KEITHLEY INSTRUMENTS INC
10-K405, 1997-12-29
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            ------------------------

                                    FORM 10-K

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF
1934 [FEE REQUIRED].

For fiscal year ended,  SEPTEMBER 30, 1997        Commission file number 1-9965
                        ------------------                               ------

                           KEITHLEY INSTRUMENTS, INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

               OHIO                                      34-0794417
- ----------------------------------------    ------------------------------------
(State of incorporation or organization)    (I.R.S. Employer Identification No.)

    28775 AURORA ROAD, SOLON, OHIO                         44139
- ------------------------------------------     --------------------------------
 (Address of principal executive offices)                (Zip Code)

Registrant's telephone number, including area code   (440) 248-0400
                                                    -----------------

Securities registered pursuant to Section 12(b) of the Act:

COMMON SHARES, WITHOUT PAR VALUE                 NEW YORK STOCK EXCHANGE
- -----------------------------------     ---------------------------------------
     (Title of each class)              (Name of exchange on which registered)



Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months, and (2) has been subject to such filing requirements
for the past 90 days. Yes X  No
                         ---   ---

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [X]

As of December 16, 1997 there were outstanding 4,885,655 Common Shares, without
par value, and 2,785,378 Class B Common Shares, without par value. At that date,
the aggregate market value of the Common Shares of the Registrant held by
non-affiliates was $38,348,345 and the aggregate market value of the Class B
Common Shares of the Registrant held by non-affiliates was $967,295 for a total
aggregate market value of all classes of Common Shares held by non-affiliates of
$39,315,640. While the Class B Common Shares are not listed for public trading
on any exchange or market system, shares of that class are convertible into
Common Shares at any time on a share-for-share basis. The market values
indicated were calculated based upon the last sale price of the Common Shares as
reported by the New York Stock Exchange on December 16, 1997, which was $8.75.
For purposes of this information, the 502,987 Common Shares and 2,674,830 Class
B Common Shares which were held by the officers and Directors of the Company
were deemed to be voting stock held by affiliates.

                       DOCUMENTS INCORPORATED BY REFERENCE

<TABLE>
<CAPTION>
DOCUMENT                                                                                         PART OF 10-K
- --------                                                                                         ------------
<S>   <C>                                                                                           <C>
1.    Annual report to shareholders for the fiscal year ended September 30, 1997                    Parts I and II
      (only the portions listed in this report).
2.    Proxy statement for the annual meeting of shareholders to be held on February 14, 1998        Part III
      (only the portions listed in this report).
</TABLE>


<PAGE>   2


                           KEITHLEY INSTRUMENTS, INC.

                               10-K ANNUAL REPORT


                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
PART I:                                                                                   PAGE
                                                                                          ----

<S               <C>                                                                      <C>
         Item 1.  Business                                                                  1
         Item 2.  Properties                                                                9
         Item 3.  Legal Proceedings                                                        10
         Item 4.  Submission of Matters to a Vote of Security Holders                      10

PART II:

         Item 5.  Market for the Registrant's Common Equity and Related
                    Stockholder Matters                                                    13
         Item 6.  Selected Financial Data                                                  13
         Item 7.  Management's Discussion and Analysis of Financial
                    Condition and Results of Operations                                    13
         Item 8.  Financial Statements and Supplementary Data                              13
         Item 9.  Changes in and Disagreements with Accountants on
                    Accounting and Financial Disclosure                                    13

PART III.

         Item 10. Directors and Executive Officers of the Registrant                       14
         Item 11. Executive Compensation                                                   14
         Item 12. Security Ownership of Certain Beneficial Owners and
                    Management                                                             14
         Item 13. Certain Relationships and Related Transactions                           14

PART IV:

         Item 14. Exhibits, Financial Statement Schedules and Reports on
                    Form 8-K                                                               15
</TABLE>



<PAGE>   3


                                                    PART I.

ITEM 1 - BUSINESS.
         ---------

General
- -------

         Keithley Instruments, Inc. is a corporation which was founded in 1946
and organized under the laws of the State of Ohio on October 1, 1955. Its
principal executive offices are located at 28775 Aurora Road, Solon, Ohio 44139;
telephone (440) 248-0400. References herein to the "Company" or "Keithley" are
to Keithley Instruments, Inc. and its subsidiaries unless the context indicates
otherwise.

Products
- --------

         Keithley Instruments, Inc. provides measurement-based solutions to the
semiconductor, telecommunications and electronic components manufacturers and
other high-growth areas of the electronics industry. Engineers and scientists
around the world use Keithley's advanced hardware and software for process
monitoring, production test and basis research. Although the Company's products
vary in capability, sophistication, use, size and price, they basically test,
measure, and analyze electrical and physical properties. As such, the Company
considers its business to be in a single industry segment. For each of the last
three fiscal years, more than 90% of the Company's revenue was derived from the
sale of electronic test and measurement instrumentation and data acquisition and
analysis hardware and software, which represents one class of similar products.

         The product groups of the Company are described below:

         INSTRUMENTS. The Instruments Business Unit designs, develops,
manufactures and markets sensitive electronic instrumentation used in production
test and research for measuring a wide range of electrical properties such as
voltage, resistance, current, capacitance and charge. The Instruments Business
Unit's products generally range in price from $1,000 to $10,000 and include the
following product groups:

             DIGITAL MULTIMETERS. This product line includes a range of
             instruments that are designed to cover measurements of voltage,
             resistance, and current for production test, design and
             development, and research applications. Each digital multimeter has
             a computer interface for integration into automated test and
             measurement systems. Typical applications include testing
             electrical components such as resistor networks and thermistors,
             and end products which include cellular telephones, computer disk
             drives, and pace makers.

             SENSITIVE INSTRUMENTS. This product group includes electrometers,
             picoammeters, sensitive digital voltmeters, micro-ohmmeters, and
             certain other instruments which are distinguished by their extreme
             sensitivity, resolution and accuracy as compared to the
             capabilities of conventional meters. Sensitive instruments are used
             by scientists, engineers, and researchers for the study of
             materials, semiconductors, and 



                                       1
<PAGE>   4



             superconductors. Typical customers are industrial and government
             research laboratories, educational institutions, and electronics
             manufacturers.

             SWITCHES AND SOURCES. Switching instruments are used to route
             electrical signals in test systems to measurement and source
             instrumentation. This allows many devices or test points to be
             measured with a minimum number of instruments. Switch products
             together with Sensitive, Digital Multimeter, Source, I-V and C-V
             instruments can be integrated into computer-based systems to
             provide flexible, automated testing and measurement. The switching
             product line allows Keithley to provide a complete measurement
             solution to customers in production test, semi-conductor
             characterization, and materials research applications.

             Sources generate the precise voltage and currents needed to test
             electronic devices and investigate properties of materials. Source
             products are sold to scientists and engineers in research,
             semiconductor and electronic manufacturing markets, especially
             where stable signals of low level current and voltage are needed.
             These sources can be interfaced with computers as part of an
             automated test system, or used manually on the laboratory bench.

             SOURCE MEASURE UNITS. These are programmable instruments capable of
             sourcing and measuring voltage and current, thus replacing the
             functionality of four instruments with one reliable, compact unit.
             These versatile instruments cover a wide dynamic range of voltage
             and current and their combination of high speed and resolution have
             made these units ideal for high volume production testing of
             electronic components for computers, automotive, and wireless
             telecommunications products. The source measure units also provide
             the measurement sensitivity needed for materials research and
             semiconductor characterization applications.

             C-V (CAPACITANCE VERSUS VOLTAGE). C-V products include
             high-frequency and quasistatic C-V meters, measurement and analysis
             software, and computer-based test systems. C-V products are used by
             scientists and engineers in semiconductor manufacturing facilities,
             industrial and governmental research laboratories, and educational
             institutions to research, develop, and characterize semiconductor
             devices, materials and manufacturing processes.

         SEMICONDUCTOR BUSINESS UNIT. The Semiconductor Business Unit designs,
develops, manufactures and markets automatic parametric test systems and process
monitoring solutions used by semiconductor manufacturers to measure various
electrical characteristics of semiconductor materials. Its products can be found
in semiconductor fabrication facilities throughout the world, and consist of two
main groups:

             APT PRODUCTS. The Company is one of the leading suppliers of these
             automatic parametric test systems for semiconductor production
             applications. In production, the systems allow manufacturers to
             monitor quality control parameters during fabrication of integrated
             circuits to improve manufacturing yields. In research, the systems
             are used to analyze the characteristics of semiconductor materials
             in the development of integrated circuit devices. The systems can
             also be used to develop 



                                       2
<PAGE>   5


             integrated circuit manufacturing processes. A typical system
             incorporates Keithley instrumentation and software and computer
             hardware manufactured by others. The system's major components are
             integrated, and in most cases, customized to customer
             specification. Installation and servicing of the equipment and
             software, and customer training are also provided. Selling prices
             for these products generally range from $100,000 to $250,000. In
             February 1996, Keithley purchased the principal assets of Turner
             Engineering Technology (Turner). Turner developed wafer test
             structures used for determining the quality of semiconductor wafers
             at various stages of manufacturing. These test structures will
             allow the company's APT systems to determine the quality of both
             the wafer and the manufacturing process much earlier than with
             previous test methods.

             OXIDE MONITORING SYSTEM. Quantox(R) is the first product based on
             the direct wafer measurement or non-contact technology licensed
             from International Business Machines in May 1994. The measurement
             data Quantox provides are used to detect and identify the types of
             charges present on semiconductor wafers. Charge is a critical
             indicator that tells the semiconductor production engineer whether
             or not the manufacturing process is "in spec." This measurement is
             made within minutes using Quantox, replacing a procedure that used
             to take up to five days. The selling price for a Quantox unit is
             approximately $500,000 depending upon the options purchased.

         RADIATION MEASUREMENTS BUSINESS UNIT. The Radiation Measurements
Business Unit designs, develops, manufactures, and markets products and systems
that accurately measure the radiation emission levels of x-ray machines and
nuclear radiation sources and are used to calibrate radiation therapy and x-ray
equipment in hospitals and manufacturing processes. Customers include hospitals,
diagnostic x-ray equipment manufacturers, radiation researchers and physicists,
and field service organizations. Selling prices for standard products range from
$500 to $10,500 per instrument. The Radiation Measurements Business Unit is
developing and producing personal dosimetry systems using recently acquired
laser thermoluminescence dosimetry for the U.S. Navy under contract and plans to
commercialize the technology over the next few years.


         PC MEASUREMENTS BUSINESS UNIT. This Business Unit designs, develops,
manufactures and markets a wide range of data acquisition and analysis hardware
and software products designed for use with personal computers and workstations.
These products are used in thousands of applications worldwide wherever a number
of variables must be monitored and analyzed quickly. Selling prices for these
products generally range from $100 to $4,000.

         These products are marketed under the brand names Keithley MetraByte
and Acculex and are composed of the following product groups:

             PLUG-IN DATA ACQUISITION BOARDS provide data acquisition
             capabilities in the form of a board that is installed into a slot
             of the computer. The Company offers a wide range of plug-in data
             acquisition boards in terms of the number of channels, input ranges
             and sampling rates. They are marketed worldwide to researchers and
             scientists engaged in laboratory automation and experimentation, as
             well as to engineers 



                                       3
<PAGE>   6


             involved with process control and data collection applications.
             These products are marketed primarily through direct marketing and
             catalog mailings.

             SOFTWARE products are specialized personal computer-based
             scientific data acquisition, analysis and graphics software
             products. Scientists and engineers often combine Keithley software
             together with data acquisition hardware or test and measurement
             instrumentation of other manufacturers. The software products are
             used with personal computers.

             ACCULEX products include digital panel meters and panel printers.
             These products display machine parameters, capture results for
             permanent storage and enunciate alarms. These products are marketed
             primarily through direct marketing and catalog mailings.

             DISTRIBUTED I/O products include Keithley's WORKHORSE and MetraBus
             product offerings. These products are primarily used in industrial
             monitoring and control applications.

             COMMUNICATION products include IEEE-488 bus interfaces and software
             for interfacing computers with programmable measurement
             instrumentation. These products are marketed through direct
             marketing and catalog mailings.

             DATA ACQUISITION INSTRUMENTS include personal computer-based
             workstations that collect data from, and provide control over, a
             variety of test and measurement modules. A typical workstation
             consists of a standard software package and hardware external to
             the personal computer that utilizes various plug-in module cards
             that allow a user to customize the workstation for a specific
             application, including research, product test and pilot plant
             process monitoring.

             PERSONAL COMPUTER INSTRUMENT PRODUCTS (PCIP) are instruments
             contained entirely on boards that fit into an expansion slot of
             almost any personal computer. Included in the PCIP offering are a
             digital multimeter, scanner oscilloscope, function generator and a
             counter. Applications include bench top engineering and automatic
             production testing. These products are marketed primarily through
             direct marketing and catalog mailings.

             SMARTLINK(TM) is a line of intelligent measurement modules that
             allow laboratory-grade measurements virtually anywhere due to their
             small size. The compact modules connect directly to a sensor or
             signal source creating no need for extra hardware. Each module has
             on-board signal processing capabilities to provide linearization,
             date/time stamping alarming that allows them to deliver useful
             information directly to a monitoring, control or data acquisition
             system. Selling prices for these products generally range from $500
             to $2,500.

         AGENCY PRODUCTS. The Company markets and distributes certain products
manufactured by approximately eight test and measurement companies. These
products are 


                                       4
<PAGE>   7


marketed and distributed primarily by the Company's European operations and are
complementary to, but not competitive with, products manufactured by the
Company.

New Products During Fiscal Year 1997
- ------------------------------------

         Several new products were introduced during fiscal 1997 including the
following:

         INSTRUMENTS introduced several new products including the Model 6517A,
2410 and 2420. The Model 6517A Electrometer/High Resistance Meter provides
accuracy, sensitivity and speed previously unavailable in this type of
instrument. The features of this model make it well-suited for measuring the
resistance, resistivity and conductance of insulating materials, finding the
voltage coefficient of resistors and characterizing the leakage of diodes and
capacitors. The Company expanded its 2400 SourceMeter Series with Model 2410, a
high voltage SourceMeter, and Model 2420, a high current SourceMeter. The new
instruments can make more than 1000 non-buffered readings per second. Both
models simultaneously source, sink and measure voltage and current, proving a
complete solution that simplifies and lowers the cost of measurement in a wide
range of applications.

         THE SEMICONDUCTOR BUSINESS UNIT began shipping a new parametric test
system, the Model S600. The S600 is designed for both production and
applications in the semiconductor industry. This product offers unprecedented
measurement speed and sensitivity, higher throughput and lower
cost-of-ownership. In the area of oxide charge monitoring, the Quantox process
monitoring product became more established.

         THE RADIATION MEASUREMENTS BUSINESS UNIT introduced software for
processing data and reporting results of tests on mammography x-ray machines to
the FDA and introduced its improved non-invasive kilovoltage divider used by
x-ray manufacturers and field service organizations worldwide. The Unit procured
a contract with the U.S. Navy worth $4.1 million for limited run initial
production of personnel dosimetry systems based on the newly acquired laser
heated thermoluminescence radiation dosimetry.

         PC MEASUREMENTS BUSINESS UNIT introduced the several additions to the
SmartLink(TM) product line. The unique design of the Models KNM-DCV41, -DCV42,
- -TC41, and -TC42 provides up to 1500V front-to-back isolation on up to six
differential analog input channels. The instruments provide unparalleled
accuracy, plus equipment and personnel protection for demanding measurement
applications, such as DC volts readings, four-wire resistance tests, and
thermocouple temperature measurements. Also introduced was the KNM-DYN12 which
can make laboratory grade measurements of force, acceleration, and dynamic
pressure in virtually any plant location.

Geographic Markets and Distribution
- -----------------------------------

         During fiscal 1997, substantially all of the Company's products were
manufactured in Ohio and were sold throughout the world in many developed
countries. The Company's 



                                       5
<PAGE>   8


principal markets are the United States, Europe and the Pacific Basin. During
the year, the Keithley Metrabyte operation was relocated from Taunton,
Massachusetts to Solon, Ohio.

         In the United States, the Company's products are sold by the Company's
sales personnel, independent sales representatives and through direct marketing
and catalog mailings. United States sales offices are located in Solon, Ohio and
Santa Clara, California. The Company markets its products directly in European
countries in which it has a wholly owned sales subsidiary and through
distributors in other countries. European subsidiaries have sales and service
offices located in or near London, Munich, Paris, Amsterdam, Zurich and Milan.
The Company also has sales offices in Belgium, China, Taiwan and India. Sales in
markets outside the above named locations are made through independent sales
representatives and distributors.

Sources and Availability of Raw Materials
- -----------------------------------------

         The Company's products require a wide variety of electronic and
mechanical components, most of which are purchased. The Company has multiple
sources for the vast majority of the components and materials it uses; however,
there are some instances where the components are obtained from a sole-source
supplier. If a sole-source supplier ceased to deliver, the Company could
experience a temporary adverse impact on its operations; however, management
believes alternative sources could be developed quickly. Although shortages of
purchased materials and components have been experienced from time to time,
these items have generally been available to the Company as needed.

Patents
- -------

         Electronic instruments of the nature the Company designs, develops and
manufactures can not generally be patented in their entirety. Although the
Company holds patents with respect to certain of its products, it does not
believe that its business is dependent to any material extent upon any single
patent or group of patents, because of the rapid rate of technological change in
the industry.

Seasonal Trends and Working Capital Requirements
- ------------------------------------------------

         Although the Company is not subject to significant seasonal trends, its
business is cyclical and is somewhat dependent upon the semiconductor industry
in particular. The Company does not have any unusual working capital
requirements.

Customers
- ---------

         The Company's customers generally are involved in engineering research
and development, product testing, electronic service or repair, and educational
and governmental research. During the fiscal year ended September 30, 1997 no
one customer accounted for more than 10% of the Company's sales. Management
believes that the loss of any one of its customers would not materially affect
the sales or net income of the Company.



                                       6
<PAGE>   9

Backlog
- -------

         The Company's backlog of unfilled orders amounted to approximately
$13,486,000 as of September 30, 1997 and approximately $9,087,000 as of
September 30, 1996. Included in the 1997 backlog is $981,000 related to a U.S.
Navy Contract. $451,000 of this was unfunded at September 30, 1997. It is
expected that the majority of the orders included in the 1997 backlog will be
delivered during fiscal 1998; however, the Company's past experience indicates
that a small portion of orders included in the backlog may be canceled.

Competitive Conditions
- ----------------------

         The Company competes on the basis of quality, performance, service,
warranty and price, with quality and performance frequently being dominant.
There are many firms in the world engaged in the manufacture of electronic
measurement instruments, some of which are larger and have greater financial
resources than the Company. The Company's competitors vary between product lines
and certain manufacturers compete with the Company in multiple product lines.
The Company's principal competitors are Hewlett-Packard Company, National
Instruments, Inc., Fluke Corporation and Data Translation, Inc.


Research And Development
- ------------------------

         The Company's engineering development activities are directed toward
the development of new products that will complement, replace or add to the
products currently included in the Company's product line. The Company does not
perform basic research, but on an ongoing basis utilizes new component and
software technologies in the development of its products. The highly technical
nature of the Company's products and the rapid rate of technological change in
the industry require a large and continuing commitment to engineering
development efforts. Product development expenses were $17,233,000 in 1997,
$18,337,000 in 1996 and $15,385,000 in 1995, or approximately 14%, 15% and 14%
of net sales, respectively, for each of the last three fiscal years. During
1997, and continuing in 1998, the Company was involved in a design and
manufacturing, cost plus fixed fee, contract with the U.S. Navy. All contract
related costs were reimbursed by the U.S. Navy and appear in the "Cost of goods
sold" caption in the consolidated financial statements as opposed to "Product
development expenses." The Company acquired the principal assets of
International Sensor Technology (IST) in 1996. IST's activities included a
government research and development contract for the Navy which was concluded
during 1996. The amount spent by the Company on this contract was accounted for
in the manner described for the current contract.

Government Regulations
- ----------------------

         The Company believes that its current operations and its current uses
of property, plant and equipment conform in all material respects to applicable
laws and regulations. The Company has not experienced, nor does it anticipate,
any material claim or material capital expenditure in connection with
environmental laws and other regulations.



                                       7
<PAGE>   10


Employees
- ---------

         As of September 30, 1997, the Company employed 693 persons, 99 of whom
were located outside the United States. None of the Company's employees are
covered under the terms of a collective bargaining agreement and the Company
believes that relations with its employees are good.

Foreign Operations and Export Sales
- -----------------------------------

         Information related to foreign and domestic operations and export sales
is incorporated by reference to Note I of the Notes to the Consolidated
Financial Statements on page 29 of the Company's 1997 Annual Report to
Shareholders, a copy of which is filed as Exhibit 13 to this report.

         The Company has significant revenues from outside the United States
which increase the complexity and risk to the Company. These risks include
increased exposure to the risk of foreign currency fluctuations and the
potential economic and political impacts from conducting business in foreign
countries. With the exception of changes in the value of foreign currencies,
which is not possible to predict, the Company believes that its foreign
subsidiaries and other larger international markets are in countries where the
economic and political climate is generally stable.



                                       8
<PAGE>   11

ITEM 2 - PROPERTIES.
         -----------

         The Company believes that the facilities owned and leased by it are
well maintained, adequately insured and suitable for their present and intended
uses. Pertinent information concerning the principal properties of the Company
and its subsidiaries is as follows:


<TABLE>
<CAPTION>
                               Type of                                                  Acreage (Land)
Owned Properties               Facility                                            Square Footage (Building)
- ----------------               --------                                            -------------------------

<S>                            <C>                                                  <C>
     Location
     --------

     Solon, Ohio               Executive offices,
                               Engineering, Manufacturing,                          26.1 Acres
                               Marketing and Sales                                  125,000 square feet

     Solon, Ohio               Engineering, Manufacturing,
                               Marketing, Sales, Service and                        7.0 Acres
                               Administration                                       76,000 square feet

     Solon, Ohio               Marketing and Administration,                        5.5 Acres
                               Space is available for expansion with                50,000 square feet
                               the majority leased to other parties.                (4,000 square feet
                                                                                    utilized by the Co.)
</TABLE>

<TABLE>
<CAPTION>
                                                                                               Lease
                               Type of                                       Square          Expiration
Leased Properties              Facility                                      Footage            Date
- -----------------              --------                                      -------            ----

<S>                            <C>                                            <C>           <C>
     Location
     --------

     Solon, Ohio               Engineering, Manufacturing,                    40,000        October 13, 2006
                               Marketing, Sales, Service
                               and Administration

     Solon, Ohio               Manufacturing, and                             21,600        March 31, 2002
                               Administration


     Santa Clara,              Sales and Service                               4,355        October 13, 2002
     California
</TABLE>



                                       9
<PAGE>   12


<TABLE>
<CAPTION>
                                                                                           Lease
                               Type of                                Square            Expiration
Location                       Facility                              Footage               Date
- --------                       --------                              -------               ----

<S>                            <C>                                     <C>            <C>
Munich,                        Sales, Service and                      27,750         March 31, 2001;
Germany                        Administration                                         renewable

London, England                Sales and Service                        5,600         July 24, 2009

Paris, France                  Sales and Service                        3,456         June 30, 1998

Zurich,                        Sales and Service                        3,229         September 30, 1998
Switzerland                                                                           renewable

Amsterdam,                     Sales and Service                        2,906         March 31, 2002
Netherlands

Milan,                         Sales and Service                        2,691         August 31, 2001
Italy
</TABLE>


ITEM 3 - LEGAL PROCEEDINGS.
         ------------------

         The Company is not a party to any material litigation.

ITEM 4 - SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
         ----------------------------------------------------

         Not applicable.


                                       10
<PAGE>   13


EXECUTIVE OFFICERS OF THE REGISTRANT:
- -------------------------------------

         The description of executive officers is included pursuant to
Instruction 3 to Section (b) of Item 401 of Regulation S-K under the Securities
and Exchange Act of 1934.

         The following table sets forth the names of all executive officers of
the Company and certain other information relating to their position held with
the Company and other business experience.

<TABLE>
<CAPTION>
Executive Officer                Age         Recent Business Experience
- -----------------                ---         --------------------------

<S>                               <C>        <C>
Joseph P. Keithley                49         Chairman of the Board of Directors since 1991, Chief
                                             Executive Officer since November 1993 and President since
                                             May 1994.

Philip R. Etsler                  47         Vice President Human Resources of the Company since 1990.

James B. Griswold                 51         Secretary and a Director of the Company since 1988;
                                             partner in the law firm of Baker & Hostetler LLP from 1982
                                             to present.

Hermann Hamm (1)                  58         Vice President of European Operations of the Company since
                                             1986.

Frederick R. Hume (1)             54         Senior Vice President Strategic Planning and Technology
                                             since November  1996. Previously Senior Vice President
                                             Test Instrumentation Group from February 1993 to October
                                             1996. Vice President Test Instrumentation  Group from
                                             August 1992 to February  1993.  Vice  President Instrument
                                             Division of the Company from May 1988 to August 1992.

Mark J. Plush                     48         Controller since 1982 and Officer of the Company since
                                             1989.

Ronald M. Rebner                  53         Vice President and Chief Financial Officer of the Company
                                             since 1981.
</TABLE>



                                       11
<PAGE>   14


<TABLE>
<CAPTION>
Executive Officer                           Age         Recent Business Experience
- -----------------                           ---         --------------------------
<S>                                          <C>        <C>
Gabriel A. Rosica                            57         Senior Vice President since February 1996. Previously
                                                        Chief Operating Officer of Bailey Controls Company from
                                                        August 1994 to January  1996 and Senior Vice President of
                                                        Systems Operations of Bailey Controls Company from January
                                                        1992 to July 1994.

Terrence E. Sheridan                         57         Vice President Radiation  Measurements Business Unit since
                                                        1978.
</TABLE>



(1) Subsequent to September 30, 1997, Mr. Hamm and Mr. Hume resigned from their
    Executive Officer positions with the Company.


                                       12
<PAGE>   15


                                    PART II.

ITEM 5 - MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER 
         -----------------------------------------------------------------
         MATTERS.
         --------

         The information required by this Item is incorporated herein by
reference under the caption Stock Market Price and Cash Dividends appearing on
page 31 of the Keithley Instruments, Inc. 1997 Annual Report to Shareholders, a
copy of which is filed as Exhibit 13 to this Report.

         The approximate number of shareholders of record of Common Shares and
Class B Common Shares, including those shareholders participating in the
Dividend Reinvestment Plan, as of December 16, 1997 was 2,394.

ITEM 6 - SELECTED FINANCIAL DATA.
         ------------------------

         The information required by this Item is incorporated herein by
reference to the eleven year summary, appearing on pages 32 and 33 of the
Keithley Instruments, Inc. 1997 Annual Report to Shareholders, a copy of which
is filed as Exhibit 13 to this Report.

ITEM 7 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         -----------------------------------------------------------------------
         OF OPERATIONS.
         --------------

         The information required by this Item is incorporated herein by
reference to pages 21 through 23 of the Keithley Instruments, Inc. 1997 Annual
Report to Shareholders, a copy of which is filed as Exhibit 13 to this Report.

ITEM 8 - FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.
         --------------------------------------------

         The Consolidated Financial Statements, appearing on pages 18 through 20
and pages 23 through 29, the Unaudited Quarterly Results of Operations appearing
on page 31 of the Keithley Instruments, Inc. 1997 Annual Report to Shareholders,
together with the report thereon of Price Waterhouse LLP dated November 17,
1997, appearing on page 30 of the Keithley Instruments, Inc. Annual Report to
Shareholders is filed as Exhibit 13 to this Report.

ITEM 9 - CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
         ---------------------------------------------------------------
         FINANCIAL DISCLOSURE.
         ---------------------

         None.


                                       13
<PAGE>   16


                                    PART III.

ITEM 10 - DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.
          ---------------------------------------------------

         The information required by this item relating to the Directors is
incorporated herein by reference to the information set forth under the caption
Election of Directors in the Company's Proxy Statement to be used in conjunction
with the February 14, 1998 Annual Meeting of Shareholders and filed with the
Securities and Exchange Commission pursuant to Section 14(a) of the Securities
Exchange Act of 1934. The information required for an identification of
executive officers is included on pages 11 and 12 of this Form 10-K Annual
Report.

ITEM 11 - EXECUTIVE COMPENSATION.
          -----------------------

         The information required by this item relating to executive
compensation is incorporated herein by reference to the information set forth
under the caption Executive Compensation and Benefits in the Company's Proxy
Statement to be used in conjunction with the February 14, 1998 Annual Meeting of
Shareholders and filed with the Securities and Exchange Commission pursuant to
Section 14(a) of the Securities Exchange Act of 1934.

ITEM 12 - SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.
          ---------------------------------------------------------------

         The information required by this item relating to security ownership of
certain beneficial owners and management is incorporated herein by reference to
the information set forth under the caption Principal Shareholders in the
Company's Proxy Statement to be used in conjunction with the February 14, 1998
Annual Meeting of Shareholders and filed with the Securities and Exchange
Commission pursuant to Section 14(a) of the Securities Exchange Act of 1934.


ITEM 13 - CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.
          -----------------------------------------------

         James B. Griswold, a Director and nominee for Director, is a partner in
the law firm of Baker & Hostetler LLP. Baker & Hostetler LLP served as general
legal counsel to the Company during the fiscal year ended September 30, 1997,
and is expected to render services in such capacity to the Company in the
future.



                                       14
<PAGE>   17


                                    PART IV.

ITEM 14 - EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K.
          ----------------------------------------------------------------

(a)(1)  FINANCIAL STATEMENTS OF THE COMPANY

         The following documents are filed as part of this report:

1. Consolidated Balance Sheet as of September 30, 1997 and 1996.

2. Consolidated Statement of Income for the years ended September 30, 1997, 1996
   and 1995.

3. Consolidated Statement of Cash Flows for the years ended September 30, 1997,
   1996 and 1995.

4. Consolidated Statement of Shareholders' Equity for the years ended September
   30, 1997, 1996 and 1995.

5. Notes to Consolidated Financial Statements.

6. Report of Independent Accountants dated November 17, 1997.

(a)(2)  FINANCIAL STATEMENT SCHEDULES

The following additional information should be read in conjunction with the
Consolidated Financial Statements of the Company described in Item 14(a)(1):

Schedule II  Valuation and Qualifying Accounts

Schedules other than those listed above are omitted because they are not
required or not applicable, or because the information is furnished elsewhere in
the consolidated financial statements or the notes thereto.


                                       15
<PAGE>   18


(a)(3)  INDEX TO EXHIBITS

<TABLE>
<CAPTION>
                                                                                                            Page Number
                                                                                                            Sequential
          Exhibit                                                                                            Numbering
          Number                  Exhibit                                                                     System
          ------                  -------                                                                     ------

<S>                     <C>                                                                                      <C>
          3(a)          Amended Articles of Incorporation, as amended on February 11, 1985. 
                        (Reference is made to Exhibit 3(a) of the Company's Form 10 Registration 
                        Statement (File No. 0-13648) as declared effective on July 31, 1985, which
                        Exhibit is incorporated herein by reference.)
                                                                                                                 --
          3(b)          Code of Regulations, as amended on February 11, 1985.  (Reference is made to
                        Exhibit 3(b) of the Company's Form 10 Registration Statement (File No. 0-13648) as
                        declared effective on July 31, 1985, which Exhibit is incorporated herein by
                        reference.)                                                                              --

          3(c)          Amended Articles of Incorporation, as amended on February 10, 1996.  (Reference is
                        made to Exhibit 3(c) of the Company's Quarterly Report on Form 10-Q for the fiscal
                        quarter ended March 31, 1996 (File No. 1-9965), which Exhibit is incorporated
                        herein by reference.)                                                                    --

          4(a)          Specimen Share Certificate for the Common Shares, without par value.  (Reference
                        is made to Exhibit 4(a) of the Company's Quarterly Report on Form 10-Q for the
                        fiscal quarter ended June 30, 1988 (File No. 1-9965), which Exhibit is
                        incorporated herein by reference.)                                                       --

          4(b)          Specimen Share Certificate for the Class B Common Shares, without par value.
                        (Reference is made to Exhibit 4(b) of the Company's Form 10 Registration Statement
                        (File No. 0-13648) as declared effective on July 31, 1985, which Exhibit is
                        incorporated herein by reference.)                                                       --

          *10(a)        1984 Stock Option Plan, adopted in February 1984.                                        --

          *10(c)        1984 Deferred Compensation Plan, adopted in February 1984.                               --

<FN>
                        *Reference is made to the appropriate Exhibits of the Company's Form 10 
                        Registration Statement (File No. 0-13648) as declared effected on July 31, 1985, 
                        which Exhibits are incorporated herein by reference.
</TABLE>



                                       16
<PAGE>   19



<TABLE>
<CAPTION>
                                                                                                            Page Number
                                                                                                            Sequential
          Exhibit                                                                                            Numbering
          Number                  Exhibit                                                                     System
          ------                  -------                                                                     ------

<S>                     <C>                                                                                      <C>
          10(k)         Employment Agreement with Joseph F. Keithley dated September 26, 1988. 
                        (Reference is made to Exhibit 10(k) of the Company's Annual Report on Form 
                        10-K for the year ended September 30, 1988 (File No. 1-9965), which
                        Exhibit is incorporated herein by reference.)                                            --

          10(l)         Employment Agreement with Joseph P. Keithley dated September 26, 1988. 
                        (Reference is made to Exhibit 10(l) of the Company's Annual Report on Form 
                        10-K for the year ended September 30, 1988 (File No. 1-9965), which
                        Exhibit is incorporated herein by reference.)                                            --

          10(o)         Form of Supplemental Executive Retirement Plan, adopted in January 1988. 
                        (Reference is made to Exhibit 10(o) of the Company's Annual Report on 
                        Form 10-K for the year ended September 30, 1988 (File No. 1-9965), which
                        Exhibit is incorporated herein by reference.)                                            --

          10(q)         1992 Stock Incentive Plan, adopted in December 1991.  (Reference is made to
                        Exhibit 10(q) of the Company's Annual Report on form 10-K for the year ended
                        September 30, 1991 (File No. 1-9965) which Exhibit is incorporated herein by
                        reference.)                                                                              --

          10(r)         1992 Directors' Stock Option Plan, adopted in December 1991.  (Reference is made
                        to Exhibit 10(r) of the Company's Annual Report on form 10-K for the year ended
                        September 30, 1991 (File No. 1-9965) which Exhibit is incorporated herein by
                        reference.)                                                                              --

          10(u)         Credit Agreement dated as of May 31, 1994 by and among Keithley Instruments, Inc. 
                        and certain borrowing subsidiaries and the Banks named herein, and NBD Bank,
                        N.A., as Agent. (Reference is made to Exhibit 10(u) of the Company's Quarterly 
                        Report on form 10-Q for the quarter ended June 30, 1994 (File No. 1-9965) which
                        Exhibit is incorporated herein by reference.)                                            --
</TABLE>


                                       17




<PAGE>   20





<TABLE>
<CAPTION>
                                                                                                            Page Number
                                                                                                            Sequential
          Exhibit                                                                                            Numbering
          Number                  Exhibit                                                                     System
          ------                  -------                                                                     ------

<S>                     <C>                                                                                     <C>
          10(v)         Contactless Testing Technology Licensing Agreement between International 
                        Business Machines Corporation and Keithley Instruments, Inc., effective as 
                        of May 26, 1994. (Reference is made to Exhibit 10(v) of the Company's Annual 
                        Report on form 10-K for the year ended September 30, 1994 (File No. 1-9965) 
                        which Exhibit is incorporated herein by reference.)                                      --

          10(x)         1996 Outside Directors Deferred Stock Plan.  (Reference is made to Exhibit 10(x)
                        of the Company's Quarterly Report on Form 10-Q for the fiscal quarter ended
                        March 31, 1996 (File No. 1-9965), which Exhibit is incorporated herein by
                        reference.)                                                                              --

          10(y)         First Amendment dated March 28, 1997, to the Credit Agreement dated May 31, 1994. 
                        (Reference is made to Exhibit 10(y) of the Company's Quarterly Report on Form
                        10-Q for the fiscal quarter ended March 31, 1997 (File No. 1-9965), which Exhibit 
                        is incorporated herein by reference.)
                                                                                                                 --
          10(z)         1997 Directors' Stock Option Plan, adopted in February 1997.                            22-24

          11            Statement Re Computation of Per Share Earnings.                                          25

          13            Annual Report to Shareholders for the Fiscal Year Ended September 30, 1997.
                                                                                                                26-60
          21            Subsidiaries of the Company.                                                             61

          23            Consent of Experts.                                                                      62

          27            Financial Data Schedule (EDGAR version only).                                            --
</TABLE>


ITEM 14(B)  REPORTS ON FORM 8-K.

No reports on Form 8-K were filed during the last quarter of the Company's
fiscal year ended September 30, 1997.

ITEM 14(C)  EXHIBITS:  See "Index to Exhibits" at Item 14(a)(3) above.

ITEM 14(D) FINANCIAL STATEMENT SCHEDULES: Schedules required to be filed in
response to this portion of Item 14 are listed above in Item 14(a)(2).


                                       18
<PAGE>   21


                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

Keithley Instruments, Inc.
(Registrant)

By:   /s/  Joseph P. Keithley
     -----------------------------
           Joseph P. Keithley, (Chairman, President and Chief Executive Officer)

Date:   December 5, 1997
     -----------------------------

         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Registrant and in the capacities on the date indicated.

<TABLE>
<CAPTION>
Signature                                      Title                                                       Date
- ---------                                      -----                                                       ----

<S>                                            <C>                                                        <C>
/s/  Joseph P. Keithley                        Chairman of the Board of Directors, President and          12/5/97
- --------------------------------------------   Chief Executive Officer
     Joseph P. Keithley                        (Principal Executive Officer)

- --------------------------------------------   Founder and Director                                       12/5/97
     Joseph F. Keithley

/s/  Ronald M. Rebner                          Vice President and Chief Financial Officer (Principal      12/5/97
- --------------------------------------------   Financial and Accounting Officer) and a Director
     Ronald M. Rebner                       

/s/  Brian R. Bachman                          Director                                                   12/5/97
- --------------------------------------------
     Brian R. Bachman

                                               Director                                                   12/5/97
- --------------------------------------------
     James T. Bartlett

/s/  Arden L. Bement, Jr.                      Director                                                   12/5/97
- --------------------------------------------
     Dr. Arden L. Bement, Jr.

/s/  James B. Griswold                         Director                                                   12/5/97
- --------------------------------------------
     James B. Griswold

/s/  Leon J. Hendrix, Jr.                      Director                                                   12/5/97
- --------------------------------------------
     Leon J. Hendrix, Jr.

/s/  R. Elton White                            Director                                                   12/5/97
- --------------------------------------------
     R. Elton White
</TABLE>



                                       19
<PAGE>   22


Report of Independent Accountants on
Financial Statement Schedule



To the Board of Directors of
Keithley Instruments, Inc.


Our audits of the consolidated financial statements referred to in our report
dated November 17, 1997 appearing on page 30 of the 1997 Annual Report to
Shareholders of Keithley Instruments, Inc., (which report and consolidated
financial statements are incorporated by reference in this Annual Report on Form
10-K) also included an audit of the Financial Statement Schedule listed in Item
14(a)(2) of this Form 10-K. In our opinion, this Financial Statement Schedule
presents fairly, in all material respects, the information set forth therein
when read in conjunction with the related consolidated financial statements.




PRICE WATERHOUSE LLP

Cleveland, Ohio
November 17, 1997



                                       20
<PAGE>   23


                                                                     SCHEDULE II
                           KEITHLEY INSTRUMENTS, INC.
                        VALUATION AND QUALIFYING ACCOUNTS
                            (In Thousands of Dollars)




<TABLE>
<CAPTION>
Column A                               Column B               Column C              Column D               Column E
- --------                               --------               --------              --------               --------
                                      Balance at            Charged to 
                                      Beginning                Costs                                    Balance at End
Description                           of Period             and Expenses         Deductions (1)           of Period
- -----------                           ---------             ------------         --------------           ---------


<S>                                     <C>                     <C>                   <C>                   <C>   
For the Year Ended 
September 30, 1997:

Valuation allowance for
deferred tax assets                     $2,994                  $172                   --                   $3,166

For the Year Ended September
30, 1996:

Valuation allowance for
deferred tax assets                     $2,606                  $467                   $79                  $2,994

For the Year Ended September
30, 1995:

Valuation allowance for
deferred tax assets                     $3,330                  $ 80                 $ 804                  $2,606
</TABLE>


(1)   Represents utilization of foreign tax credits.


                                       21


<PAGE>   1
10(z) Material Contracts.


                           KEITHLEY INSTRUMENTS, INC.

                        1997 DIRECTORS' STOCK OPTION PLAN

                  1. PURPOSE. The purpose of this 1997 Directors' Stock Option
Plan (the "Plan") is to enable Keithley Instruments, Inc. (the "Company") to
attract, retain and reward directors of the Company and strengthen the mutuality
of interest between such directors and the Company's shareholders by offering
such directors options ("Options") to purchase shares of the Company's no par
value Common Shares ("Common Shares"). This Plan replaces and supersedes the
Keithley Instruments, Inc. 1992 Directors' Stock Option Plan (the "1992
Directors' Option Plan"), effective as of the date this Plan is adopted by the
Board of Directors of the Company.

                  2. GRANT AND ELIGIBILITY. All directors of the Company who are
not employees of the Company ("Outside Directors") shall be granted Options
under the Plan. From and after the Effective Date, so long as the Plan remains
in effect and has Common Shares available for grants hereunder, each individual
who qualifies as an Outside Director at the close of any annual meeting of the
shareholders of the Company (an "Optionee") shall automatically be granted an
Option to purchase five thousand (5,000) Common Shares. In addition to the
Options granted at the close of each annual meeting of shareholders, the Board
of Directors of the Company, in its sole discretion, may grant additional
Options under the Plan to newly-elected Outside Directors, as of the date of
their initial election and in such amounts as the Board shall specify. In the
event Common Shares are available for grants hereunder, but the number of such
Shares is insufficient to provide an Outside Director with an Option to purchase
five thousand (5,000) Common Shares, such Outside Director shall receive an
Option to purchase the lesser of (i) the number of Common Shares remaining
available for grant under the Plan; or (ii) the number of Common Shares being
granted to any other Outside Director concurrently entitled to a grant of
Options hereunder, so that Options are granted to all such Outside Directors on
a PRO RATA basis. The maximum aggregate number of Common Shares available for
issuance under the Plan is two hundred thousand (200,000); such Common Shares
may be treasury shares or authorized but unissued shares or a combination of the
foregoing. If an Option granted under the Plan shall expire, terminate or become
forfeited for any reason other than its exercise, the shares subject to, but not
delivered under, such Option shall be available for the grant of other Options
pursuant to the Plan.

                  3. TERM OF OPTION, EXERCISE AND TRANSFERABILITY. The term of
each Option granted under the Plan shall be ten years. An Optionee who has
continuously served as a director of the Company from the date of the grant of
an Option through the date of vesting may first exercise such Option after the
date of vesting for all or part of the number of Common Shares in accordance
with the Plan. For this purpose, the "date of vesting" for any Option granted
under the Plan shall be that date which is six months and one day after the
later to occur of: (i) the effective date of the Plan; or (ii) the date such
Optionee is elected as a director; or (iii) the date such Option is granted. An
Outside Director who resigns or is removed before the date of vesting for any
Options held by such Director shall forfeit such Options, unless otherwise
approved by the Board of Directors.

No Option shall be transferable by the Optionee other than by will or the laws
of descent and distribution. Options shall be exercisable during the Optionee's
lifetime only by an Optionee or by his or her legal guardian or legal
representative. Notwithstanding the first and second sentences of this paragraph
or the preceding paragraph, if any Optionee dies while holding unexercised
Options, any Option held by such Optionee at the time of his or her death shall
thereafter be exercised, to the extent such Option was exercisable at the time
of death, by the estate of the Optionee (acting through its fiduciary), within a
period of one year from the date of such death regardless of the term of the
Option remaining at the Optionee's death.

                  4. OPTION PRICE AND PAYMENT. The option price for each Common
Share purchasable under an Option shall be the fair market value of a Common
Share on the date such Option is granted in accordance with Section 2; for this
purpose, "fair market value" shall be the average of the highest and lowest
price for a Common Share, as quoted on the New York Stock Exchange (or if Common
Shares are not then traded on such Exchange, on any other exchange on which
Common Shares are then traded) on the date preceding the date of grant. The
option price shall be payable (i) in cash; (ii) by check acceptable to the
Company; (iii) by delivery of shares of the same class of stock subject to such
Option; or (iv) a combination of the above, so long as the sum of the fair
market value of any such cash, check or Common Shares equals the option price.
The Company shall have the right to require an Optionee who is entitled to
receive Common Shares pursuant to the exercise of an Option to pay to the
Company the amount of any taxes which the Company is required to withhold with
respect to such Common Shares. Such amount shall be payable (i) in cash; (ii) by
check acceptable to the Company; (iii) by delivery of shares of the same class
of stock subject to the Option; or (iv) a combination of the above.



<PAGE>   2


                  5. CHANGE IN CONTROL.

                  (a) IMPACT OF EVENT. In the event of a "Change in Control" as
defined in Section 5(b), all Options granted under the Plan shall vest upon the
later to occur of (i) such Change in Control; or (ii) six months and one day
after the date of grant of such Options.

                  (b) DEFINITION OF CHANGE IN CONTROL. For purposes of Section
5(a), a "Change in Control" shall be deemed to have occurred if: (i) a tender
offer shall be made and consummated for the ownership of 25% or more of the
outstanding voting securities of the Company; (ii) the Company shall be merged
or consolidated with another corporation and, as a result of such merger or
consolidation, less than 75% of the outstanding voting securities of the
surviving or resulting corporation shall be owned in the aggregate by the former
shareholders of the Company as the same shall have existed immediately prior to
such merger or consolidation; (iii) the Company shall sell substantially all of
its assets to another corporation which is not a wholly owned subsidiary; or
(iv) a person, within the meaning of Section 3(a)(9) or of Section 13(d)(3) (as
in effect on the date hereof) of the Securities Exchange Act of 1934 (the
"Exchange Act"), shall acquire, other than by reason of inheritance, twenty-five
percent (25%) or more of the outstanding voting securities of the Company
(whether directly, indirectly, beneficially or of record). In making any such
determination, transfers made by a person to an affiliate of such person (as
determined by the Board of Directors of the Company), whether by gift, devise or
otherwise, shall not be taken into account. For purposes of this Plan, ownership
of voting securities shall take into account and shall include ownership as
determined by applying the provisions of Rule 13d-3(d)(1)(i) as in effect on the
date hereof pursuant to the Exchange Act.

                  6. ADJUSTMENTS. (a) If, at any time subsequent to the date of
adoption of the Plan, the number of Common Shares are increased or decreased, or
changed into or exchanged for a different number or kind of shares of stock or
other securities of the Company or of another corporation (whether as a result
of a stock split, stock dividend, combination or exchange of shares, exchange
for other securities, reclassification, reorganization, redesignation, merger,
consolidation, recapitalization or otherwise): (i) there shall automatically be
substituted for each Common Share subject to an unexercised Option (in whole or
in part) granted under the Plan, the number and kind of shares of stock or other
securities into which each outstanding Common Share shall be changed or for
which each such Common Share shall be exchanged; and (ii) the option price per
Common Share or unit of securities shall be increased or decreased
proportionately so that the aggregate purchase price for the securities subject
to an Option shall remain the same as immediately prior to such event.

                  (b) No adjustment pursuant to this Section 6 shall be required
unless such adjustment would require an increase or decrease of at least one
percent (1%) in such number or price; however, any adjustments which by reason
of this Section 6 are not required to be made shall be carried forward.
Calculations under this Section 6 shall be made to the nearest cent or to the
nearest full share, as the case may be. Anything in this Section 6 to the
contrary notwithstanding, the Company shall be entitled to make such reductions
in the option price, in addition to those required by this Section 6, as it, in
its discretion shall determine to be advisable in order that any stock
dividends, subdivisions or splits of shares, distribution of rights to purchase
stock or securities, or a distribution of securities convertible into or
exchangeable for stock hereafter made by the Company to its shareholders shall
not be taxable.

                  7. OTHER TERMS. Each grant of Options hereunder shall be
evidenced by a Shares Option Agreement in substantially the form attached hereto
as Exhibit A. When exercisable in accordance with Section 3, Options may be
exercised, in whole or in part, by giving written notice of exercise to the
Company specifying the number of Common Shares to be purchased. Such notice
shall be accompanied by payment of the option price of the Common Shares for
which the Option is exercised in accordance with Section 4.

                  8. AMENDMENT. The Board of Directors of the Company (the
"Board") may at any time amend, modify, suspend or terminate this Plan, except
with respect to Options already granted.

                  9. TERMINATION OF PLAN. The Plan shall be terminated and no
further Options shall be granted hereunder as of the tenth (10th) anniversary of
the date this Plan is adopted by the Board. Options granted prior to such tenth
anniversary may extend beyond that date.

                  10. COMPLIANCE WITH LAW AND APPROVAL OF REGULATORY BODY. No
Option shall be exercisable and no Common Shares will be delivered under this
Plan except in compliance with all applicable federal and state laws and
regulations, including, without limitation, compliance with applicable
withholding tax requirements, if any, and with the rules of all domestic stock
exchanges on which the Company's stock may be listed. Any stock certificates
issued to evidence Common Shares as to which an Option is exercised may bear
such legends and statements as the Company shall deem advisable to assure
compliance with federal and state laws and 


                                      -2-
<PAGE>   3

regulations; the Company may, if it deems appropriate, condition its grant of
any Options hereunder upon receipt of the following investment representation
from the Optionee:

         "I agree that any Common Shares of Keithley Instruments, Inc. which I
         may acquire by virtue of this Stock Option shall be acquired for
         investment purposes only and not with a view to distribution or resale,
         and may not be transferred, sold, assigned, pledged, hypothecated or
         otherwise disposed of by me unless (i) a registration statement or
         post-effective amendment to a registration statement under the
         Securities Act of 1933, as amended, with respect to said Common Shares
         has become effective so as to permit the sale or other disposition of
         said shares by me; or (ii) there is presented to Keithley Instruments,
         Inc. an opinion of counsel satisfactory to Keithley Instruments, Inc.
         to the effect that the sale or other proposed disposition of said
         Common Shares by me may lawfully be made otherwise than pursuant to an
         effective registration statement or post-effective amendment to a
         registration statement relating to the said shares under the Securities
         Act of 1933, as amended."

No Option shall be exercisable, and no stock will be delivered under this Plan,
until the Company has obtained such consent or approval from the regulatory
body, federal or state, having jurisdiction over such matters as the Company may
deem advisable. In the case of the exercise of an Option by a person or estate
acquiring the right to exercise such Option by bequest or inheritance, the
Company may require reasonable evidence as to the ownership of such Option and
may require such consents and releases of taxing authorities as the Committee
may deem advisable.

                  11. EFFECTIVE DATE. The Plan shall be effective as of February
15, 1997, subject to ratification by a majority vote of the Company's
shareholders, taken expressly for that purpose.

                  12. GOVERNING LAW. The Plan, all options and actions taken
thereunder and any agreements relating thereto shall be governed by and
controlled in accordance with Ohio law.














































                                      -3-

<PAGE>   1
11. Statement re computation of per share earnings

<TABLE>
<CAPTION>

                                                       Year ended         Year ended          Year ended
                                                      September 30,      September 30,       September 30, 
                                                          1997               1996                1995
<S>                                                    <C>                <C>                 <C>      
Primary EPS calculation:
- ------------------------
Shares outstanding at beginning of period              7,450,878          7,227,972           7,104,876

Net issuance of shares under stock award
  plans, weighted average                                 66,545             76,823              22,768

Net issuance of shares under stock
  purchase plan, weighted average                         70,671             55,617              30,038
                                                       ---------          ---------           ---------

Weighted average shares outstanding                    7,588,094          7,360,412           7,157,682
                                                       ---------          ---------           ---------

Assumed exercise of stock options,
  weighted average of incremental shares                 260,895            421,122             281,602

Assumed purchase of stock under stock
  purchase plan, weighted average                         17,761             40,812              36,854
                                                       ---------          ---------           ---------

Average shares and common share
  equivalents - primary EPS calculation                7,866,750          7,822,346           7,476,138
                                                       =========          =========           =========

Net income (loss) per share                                 $.10            $  (.70)             $  .66
                                                            ====            =======              ======

Net income (loss) in thousands                              $790            $(5,440)             $4,914
                                                            ====            =======              ======

Fully diluted EPS calculation:
- ------------------------------
Weighted average shares outstanding                    7,588,094          7,360,412           7,157,682

Assumed exercise of stock options,
  weighted average of incremental shares                 373,884            421,122             508,496

Assumed purchase of stock under stock
  purchase plan, weighted average                         32,903             40,812              53,598
                                                       ---------          ---------           ---------

Average shares and common share
  equivalents - fully diluted EPS calculation          7,994,881          7,822,346           7,719,776
                                                       =========          =========           =========


Net income (loss) per share                                 $.10            $  (.70)             $  .64
                                                            ====            =======              ======

Net income (loss) in thousands                              $790            $(5,440)             $4,914
                                                            ====            =======              ======
</TABLE>



<PAGE>   1
13.   Annual Report to Shareholders for the Fiscal Year Ended September 30, 1997

Consolidated Statement of Income
For the years ended September 30, 1997, 1996 and 1995 
(In Thousands of Dollars Except for Per-Share Data)

<TABLE>
<CAPTION>
                                                        1997            1996              1995
                                                     --------          -------          -------
<S>                                                 <C>              <C>               <C>      
Net sales                                           $ 123,295        $ 118,946         $ 109,574
                                                    ---------        ---------         ---------
Cost of goods sold                                     51,924           46,140            42,372
Selling, general and administrative expenses           50,789           47,695            43,945
Product development expenses                           17,233           18,337            15,385
Special charges                                           771           11,645              --
Amortization of intangible assets                         222              634               464
Net financing expenses                                  1,145              819               986
                                                    ---------        ---------         ---------
Income (loss) before income taxes                       1,211           (6,324)            6,422
Income taxes (benefit)                                    421             (884)            1,508
                                                    ---------        ---------         ---------
Net income (loss)                                   $     790        $  (5,440)        $   4,914
                                                    =========        =========         =========
Net income (loss) per share                         $     .10        $    (.70)        $     .66
                                                    =========        =========         =========
Fully diluted net income (loss) per share           $     .10        $    (.70)        $     .64
                                                    =========        =========         =========
</TABLE>

The accompanying notes are an integral part of the financial statements.






<PAGE>   2


Consolidated Balance Sheet
September 30, 1997 and 1996
(In Thousands of Dollars Except for Share Data)

<TABLE>
<CAPTION>

                                                                   1997             1996
                                                                 --------         --------
Assets
Current assets:
<S>                                                              <C>              <C>     
     Cash and cash equivalents                                   $  1,727         $  3,995
     Accounts receivable and other, net of allowances
           of $675 in 1997 and $630 in 1996                        25,113           18,538
     Inventories:
           Raw materials                                            7,787            8,255
           Work in process                                          5,671            4,880
           Finished products                                        3,121            4,291
                                                                 --------         --------
                 Total inventories                                 16,579           17,426
     Deferred income taxes                                          2,541            3,082
     Prepaid expenses                                                 566              699
                                                                 --------         --------
                 Total current assets                              46,526           43,740
                                                                 --------         --------
Property, plant and equipment, at cost:
     Land                                                           1,325            1,325
     Buildings and leasehold improvements                          15,917           13,310
     Manufacturing, laboratory and office equipment                24,285           23,238
                                                                 --------         --------
                                                                   41,527           37,873
        Less-Accumulated depreciation and amortization             24,272           22,531
                                                                 --------         --------
                 Total property, plant and equipment, net          17,255           15,342
                                                                 --------         --------
Intangible assets, net of accumulated amortization
   of $29,930 in 1997 and $29,708 in 1996                           1,825            2,064
Other assets                                                       13,507           12,688
                                                                 --------         --------
Total assets                                                     $ 79,113         $ 73,834
                                                                 ========         ========

Liabilities and Shareholders' Equity
Current liabilities:
     Current installments on long-term debt                      $     16         $     61
     Accounts payable                                              11,568            8,162
     Accrued payroll and related expenses                           4,698            4,525
     Other accrued expenses                                         6,951            9,358
     Income taxes payable                                           1,821            2,955
                                                                 --------         --------
                 Total current liabilities                         25,054           25,061
                                                                 --------         --------

Long-term debt                                                     17,442           13,308
Other long-term liabilities                                         3,899            3,655
Deferred income taxes                                                  35               54
Shareholders' equity:
     Common Shares, stated value $.025:
       Authorized - 30,000,000; issued and outstanding -
       4,877,975 in 1997 and 4,656,600 in 1996                        122              116
     Class B Common Shares, stated value $.025:
       Authorized - 9,000,000; issued and outstanding -
       2,786,278 in 1997 and 2,794,278 in 1996                         70               70
     Capital in excess of stated value                              7,297            5,293
     Earnings reinvested in the business                           25,773           25,865
     Cumulative translation adjustment                                250              562
     Unamortized portion of restricted stock plans                   (569)             (14)
     Common shares held in treasury, at cost                         (260)            (136)
                                                                 --------         --------
                 Total shareholders' equity                        32,683           31,756
                                                                 --------         --------
Total liabilities and shareholders' equity                       $ 79,113         $ 73,834
                                                                 ========         ========
</TABLE>

The accompanying notes are an integral part of the financial statements.


<PAGE>   3


Consolidated Statement of Shareholders' Equity 
For the years ended September 30, 1997, 1996 and 1995 
(In Thousands of Dollars Except for Share Data)

<TABLE>
<CAPTION>

                                               1997                       1996                         1995
                                               ----                       ----                         ----
                                              Shares        $            Shares        $              Shares        $
                                           ----------    ----------    ----------    ----------    ----------    ----------
<S>                                         <C>                 <C>     <C>                 <C>     <C>                 <C>
Common Shares:
Beginning balance                           4,656,600           116     4,308,976           108     4,156,836           104
Shares issued under stock plans               213,375             6       222,906             5       123,096             3
Conversion of Class B Common Shares             8,000          --         124,718             3        29,044             1
                                           ----------    ----------    ----------    ----------    ----------    ----------
Ending balance                              4,877,975           122     4,656,600           116     4,308,976           108
                                           ==========    ----------    ==========    ----------    ==========    ----------

Class B Common Shares:
Beginning balance                           2,794,278            70     2,918,996            73     2,948,040            74
Conversion to Common Shares                    (8,000)         --        (124,718)           (3)      (29,044)           (1)
                                           ----------    ----------    ----------    ----------    ----------    ----------
Ending balance                              2,786,278            70     2,794,278            70     2,918,996            73
                                           ==========    ----------    ==========    ----------    ==========    ----------

Common Shares held in treasury, at cost:
Beginning balance                             (10,155)         (136)         --            --            --            --
Shares repurchased                            (12,360)         (124)      (10,155)         (136)         --            --
                                           ----------    ----------    ----------    ----------    ----------    ----------
Ending balance                                (22,515)         (260)      (10,155)         (136)         --            --
                                           ==========    ----------    ==========    ----------    ==========    ----------

Capital in excess of stated value:
Beginning balance                                             5,293                       3,981                       3,469
Shares issued under stock plans                               1,742                       1,385                         512
Other                                                           262                         (73)                       --
                                                            -------                     -------                     -------
Ending balance                                                7,297                       5,293                       3,981
                                                            -------                     -------                     -------
                                                                                                                    
Cumulative translation adjustment:                                                                                  
Beginning balance                                               562                         589                         368
Translation adjustments                                        (550)                        (76)                        324
Gains (losses) from hedging net investments                                                                         
  in foreign subsidiaries                                       238                          49                        (103)
                                                            -------                     -------                     -------
Ending balance                                                  250                         562                         589
                                                            -------                     -------                     -------
                                                                                                                    
Unamortized portion of restricted stock plan:                                                                       
Beginning balance                                               (14)                         (6)                        (12)
Shares issued under stock plans                                (742)                        (14)                       --
Amortization                                                    187                           6                           6
                                                            -------                     -------                     -------
Ending balance                                                 (569)                        (14)                         (6)
                                                            -------                     -------                     -------
                                                                                                                    
Earnings reinvested in the business:                                                                                
Beginning balance                                            25,865                      32,157                      27,943
Net income (loss)                                               790                      (5,440)                      4,914
Cash dividends:                                                                                                     
  Common Shares ($.125 per share in 1997                                                                            
    and 1996 and $.106 per share in 1995)                      (603)                       (568)                       (450)
  Class B Common Shares ($.10 per share in                                                                          
    1997 and 1996 and $.085 per share in 1995)                 (279)                       (284)                       (250)
                                                            -------                     -------                     -------
Ending balance                                               25,773                      25,865                      32,157
                                                            -------                     -------                     -------
                                                                                                                    
Total shareholders' equity                                   32,683                      31,756                      36,902
                                                            =======                     =======                     =======
</TABLE>
                                                                              
On November 6, 1995, the company's Board of Directors approved a two-for-one  
split of the company's Common Shares and Class B Common Shares. The split was 
effected in the form of a stock dividend payable on December 11, 1995, to
shareholders of record on November 27, 1995. All amounts have been adjusted to
reflect the split.

The accompanying notes are an integral part of the financial statements.


<PAGE>   4


Consolidated Statement of Cash Flows 
For the years ended September 30, 1997, 1996 and 1995 
(In Thousands of Dollars)

<TABLE>
<CAPTION>

                                                                     1997             1996             1995
                                                                   --------         --------         --------
<S>                                                                <C>              <C>              <C>     
Cash flows from operating activities:
     Net income (loss)                                             $    790         $ (5,440)        $  4,914
     Adjustments to reconcile net income (loss) to
       net cash provided by (used in) operating activities:
           Depreciation                                               3,823            3,419            3,106
           Amortization of intangible assets                            222              634              464
           Deferred income taxes                                     (1,140)          (3,772)          (1,217)
           Deferred compensation                                        229              211              220
           Special charges                                             (771)          11,452             --
     Change in current assets and liabilities:
                 Accounts receivable and other                       (6,969)           2,317           (6,108)
                 Inventories                                            486           (5,275)          (2,864)
                 Prepaid expenses                                        29              (57)             289
                 Other current liabilities                            1,427             (143)           4,660
     Other operating activities                                         863             (746)          (1,007)
                                                                   --------         --------         --------
Net cash provided by (used in) operating activities                  (1,011)           2,600            2,457
                                                                   --------         --------         --------
Cash flows from investing activities:
     Payments for property, plant and equipment                      (5,849)          (8,539)          (2,695)
     Other investing activities                                         202               71               69
     Acquisitions of businesses                                        --             (1,408)            --
                                                                   --------         --------         --------
Net cash used in investing activities                                (5,647)          (9,876)          (2,626)
                                                                   --------         --------         --------
Cash flows from financing activities:
     Net decrease in short-term debt                                    (45)             (10)             (35)
     Borrowing of long-term debt                                      4,520            7,385            1,367
     Proceeds from sale of Common Shares                              1,144              974              520
     Cash dividends                                                    (882)            (852)            (700)
                                                                   --------         --------         --------
Net cash provided by financing activities                             4,737            7,497            1,152
                                                                   --------         --------         --------
Effect of changes in foreign currency exchange
   rates on cash and cash equivalents                                  (347)            (116)             195
                                                                   --------         --------         --------
Increase (decrease) in cash and cash equivalents                     (2,268)             105            1,178
Cash and cash equivalents at beginning of period                      3,995            3,890            2,712
                                                                   --------         --------         --------
Cash and cash equivalents at end of period                         $  1,727         $  3,995         $  3,890
                                                                   ========         ========         ========
Supplemental disclosures of cash flow information
     Cash paid during the year for:
           Income taxes                                            $  1,981         $  2,201         $  1,419
           Interest                                                   1,140              711              814

Supplemental schedule of noncash investing activities
     The company's acquisitions included the following
       noncash transactions:
           Fair value of assets acquired                       $       --           $  2,525     $       --
           Cash paid                                                   --             (1,408)            --
           Common Shares issued                                        --               (201)            --
                                                                   --------         --------         --------
                 Liabilities assumed                           $       --           $    916     $       --
                                                                   ========         ========         ========
</TABLE>

Disclosure of accounting policy
      For purposes of this statement, the company considers all highly liquid
      investments with maturities of three months or less when purchased to be
      cash equivalents. Cash flows resulting from hedging transactions are
      classified in the same category as the cash flows from the item being
      hedged.

The accompanying notes are an integral part of the financial statements.


<PAGE>   5


MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS

Percent of net sales for the years ended September 30, 1997, 1996 and 1995.

<TABLE>
<CAPTION>

                                                                1997         1996         1995
                                                                ----         ----         ----
<S>                                                            <C>           <C>          <C>  
Net sales                                                      100.0         100.0        100.0
Cost of goods sold                                              42.1          38.8         38.7
Selling, general and administrative expenses                    41.2          40.1         40.1
Product development expenses                                    14.0          15.4         14.0
Special charges                                                  0.6           9.8         --
Amortization of intangible assets                                0.2           0.5          0.4
Net financing expenses                                           0.9           0.7          0.9
                                                               -----         -----        -----
Income (loss) before income taxes                                1.0          (5.3)         5.9
Income taxes (benefit)                                           0.4          (0.7)         1.4
                                                               -----         -----        -----
Net income (loss)                                                0.6          (4.6)         4.5
                                                               =====         =====        =====
</TABLE>

RESULTS OF OPERATIONS (IN THOUSANDS OF DOLLARS EXCEPT FOR PER-SHARE DATA)
- -------------------------------------------------------------------------

Net income was $790, or $.10 per share, in 1997 compared to a net loss of
$5,440, or $.70 per share, in 1996, and net income of $4,914, or $.64 per share,
in 1995. Excluding special charges totaling $771 pretax, or $.06 per share, in
1997, and $11,645 pretax, or $1.23 per share, in 1996, net income was $1,280, or
$.16 per share, in 1997, and $4,185, or $.53 per share, in 1996. The special
charges recorded in 1997 and 1996 related primarily to the relocation of the
Keithley MetraByte operation from Taunton, Massachusetts to Cleveland, Ohio.
1997's selling, general and administrative expenses also include approximately
$512 pretax for non-recurring officer retirement expenses. All three years
include expenses to develop the Quantox(R) system, the company's first product
based on the technology licensed from IBM in 1994, as well as to explore other
new business opportunities. These start-up losses totaled approximately $11,900,
$10,800 and $6,900 pretax in 1997, 1996 and 1995, respectively. Earnings before
taxes and special charges excluding losses from the company's new businesses
were approximately $13,900, $16,100 and $13,300 in 1997, 1996 and 1995,
respectively.

For the third consecutive year, the company reported record net sales. Net sales
were $123,295, $118,946 and $109,574 in 1997, 1996 and 1995, respectively. On a
year to year basis, net sales increased 4% and 9% in 1997 and 1996,
respectively. Four years ago, the company developed a strategy of targeting
selected growth industries (specifically in semiconductor, telecommunications
and electronic components) and has 

<PAGE>   6


been developing application-specific products for these industries. Strong
demand for these products, as well as a full year's shipments of Quantox in
1997, has more than offset decreased sales of the company's parametric test
equipment due to the weak semiconductor capital equipment industry during the
last quarter of fiscal 1996 and through the majority of fiscal 1997.
Geographically, domestic and export sales have increased for the last two years.
Net sales in Europe decreased from 1996 to 1997 and were flat from 1995 to 1996.

Cost of goods sold as a percentage of net sales was 42.1 in 1997, 38.8 percent
in 1996 and 38.7 percent in 1995. Foreign exchange hedging had a minimal effect
on cost of goods sold in 1997, 1996 and 1995. The increase in 1997 was due to
increased sales of Quantox which carries a lower gross margin, higher fixed
costs resulting from the expansion of manufacturing facilities and an 8 percent
strengthening of the U.S. dollar. The slight increase from 1995 to 1996 resulted
from increased sales of lower gross margin products offset by increased
manufacturing efficiencies due to higher sales volume. The U.S. dollar
strengthened less than 1 percent from 1995 to 1996 and had a minimal effect on
changes in costs.

Selling, general and administrative expenses have increased 6 percent from 1996
to 1997 and 9 percent from 1995 to 1996. As a percentage of net sales, they were
41.2 in 1997, and 40.1 in both 1996 and 1995. The increases in expenses were due
mostly to higher marketing costs associated with new business initiatives and
the introduction of new products from existing businesses, and higher
commissions due to increased sales. Additionally, 1997's expense includes
approximately $512 for non-recurring officer retirement expenses.

Product development expenses decreased $1,104, or 6 percent, to 14.0 percent of
net sales in 1997 from 15.4 percent in 1996, and increased $2,952, or 19
percent, from 14.0 percent in 1995. The decrease from 1996 to 1997 was due to
substantially lower costs for Keithley MetraByte products and the company's
Model S600 parametric test system which was substantially complete in 1997. The
decreased expenses in 1997 were offset somewhat by increased costs over the last
three years for development of new bench-top instrument products and exploration
of other new business opportunities.

<PAGE>   7

An analysis of special charges recorded in the Consolidated Statement of Income
in 1997 and 1996, and the amount accrued in the Consolidated Balance Sheet is as
follows:

<TABLE>
<CAPTION>

                                                                                  Accrued at
                                                     Expense                     September 30,
Description:                                  1997            1996           1997           1996
- ------------                                  ----            ----           ----           ----

<S>                                         <C>             <C>            <C>            <C>    
Write off of Goodwill                       $  --           $ 5,737        $  --          $  --
Severance, outplacement and
  other personnel costs                        (291)          3,433            222          3,239
Lease and related costs                        (525)            998              3            998
Impaired inventory and equipment                 49             835           --             --
Relocation of facility and employees          1,073            --             --             --
Recruiting and consulting costs                 187            --             --             --
Manufacturing start-up costs                    282            --             --             --
European operating subleases                     (4)            642            574            642
                                            -------         -------        -------        -------
Totals                                      $   771         $11,645        $   799        $ 4,879
                                            =======         =======        =======        =======
</TABLE>

Since the acquisition of Keithley MetraByte in 1989, sales have declined for the
operation and earnings through 1996 had been poor. In September 1996, it became
apparent to management that due to the lack of growth, the business could not
support stand-alone operations. Therefore management made the decision to move
the Taunton, Massachusetts operation to Cleveland, Ohio. Also included in
special charges is an accrual for costs to be incurred over the next 3 to 11
years under two operating subleases at the company's European facilities.

Special charges of $771 pretax, or $.06 per share, recorded in 1997 include
gross costs of $1,902 primarily for the relocation of the Keithley MetraByte
operation from Taunton, Massachusetts to Cleveland, Ohio, net of a reversal of
$1,131 of expense (noncash) recorded during 1996 primarily for closing the
Taunton facility. The reversal of 1996 expense relates to changes in
circumstances which occurred during 1997. $256 of the gross expense represents a
noncash charge to reserve for additional impaired inventory. Special charges of
$11,645 pretax, or $1.23 per share, recorded in 1996 primarily represent the
expected costs of closing the Keithley MetraByte operation in Taunton. Of the
special charges, noncash charges in 1996 total $6,572. The relocation of the
Keithley MetraByte operation was complete in July 1997, and special charges for
the relocation going forward will not be material. At September 30, 1997 and
1996, $249 and $4,538, respectively was accrued in the Consolidated Balance

<PAGE>   8

Sheet under the category "Other accrued expenses" and $550 and $341,
respectively was accrued under the category "Other long-term liabilities."

Amortization expense of $222 in 1997 decreased from $634 in 1996. This is due to
the September 1996 write off of the remaining goodwill associated with Keithley
MetraByte. Amortization expense in 1996 increased from $464 in 1995 due to the
amortization of goodwill associated with the acquisitions of International
Sensor Technology in the first quarter of fiscal 1996 and Turner Engineering
Technology in the second quarter of fiscal 1996. Neither acquisition had a
material effect on net sales or earnings for fiscal 1997 or 1996.

Net financing expenses of $1,145 increased $326 from $819 in 1996 due to higher
average debt levels during the year. Net financing expenses decreased $167 in
1996 from $986 in 1995. Despite higher average debt levels in 1996, the decrease
from 1995 was due to lower interest rates on variable rate debt and absence of
certain fees related to the pay-off of a higher interest rate loan in the second
quarter of 1995.

The effective tax rate for 1997 was 34.7 percent. Foreign sales corporation
(FSC) benefits and benefits derived from the remittance of foreign dividends
were offset by a deferred tax charge resulting from the company's decision to
terminate corporate owned life insurance policies. The company recorded an
income tax benefit of $884 in 1996, which resulted from the company's pretax
loss. The 1996 effective rate (benefit) of (14.0) percent is less than the
statutory rate principally due to the non-deductibility of the Keithley
MetraByte goodwill written off, offset by the utilization of foreign tax credits
and FSC benefits. The effective income tax rate for 1995 of 23.5 percent is
lower than the statutory rate due primarily to utilization of foreign tax
credits and FSC benefits. At September 30, 1997, the company had capital loss
carryforwards of $123 and tax credit carryforwards of $2,334.

The company's financial results are affected by foreign exchange rate
fluctuations. Generally, a weakening U.S. dollar causes the price of the
company's product to be more attractive in foreign markets and favorably impacts
the company's sales and earnings. A strengthening U.S. dollar has an unfavorable
effect. This foreign exchange effect cannot be precisely isolated since many
other factors affect the company's foreign sales and earnings. These factors
include product offerings and 

<PAGE>   9

pricing policies of the company and its competition, whether competition is
foreign or U.S. based, changes in technology and local and worldwide economic
conditions.

From time to time, the company utilizes hedging techniques designed to mitigate
the short-term effect of exchange rate fluctuations on operations and balance
sheet positions by entering into forward and option currency contracts and by
borrowing in foreign currencies. The company's foreign borrowings are used as a
hedge of its net investments or of specified transactions. The company does not
speculate in foreign currencies or derivative financial instruments, and hedging
techniques do not increase the company's exposure to foreign exchange rate
fluctuations.

LIQUIDITY AND CAPITAL RESOURCES
- -------------------------------

In 1997, net cash used in operating activities was $1,011. Total debt of $17,458
at September 30, 1997, increased $4,089 from $13,369 at September 30, 1996 and
the debt-to-capital ratio at year-end was 34.8 percent versus 29.6 percent at
the end of fiscal 1996. The increase in debt and decrease in cash during the
year were used primarily to fund the expansion of the company's Semiconductor
and Radiation Measurements facilities. Additionally, accounts receivable levels
increased $6,575 primarily due to strong sales in September 1997.

On March 28, 1997, the company amended its credit agreement to extend its
expiration until March 28, 2002 and generally improve the terms under which the
company borrows. The agreement continued to be a $25,000 debt facility ($17,442
outstanding at September 30, 1997), which provides unsecured, multi-currency
revolving credit at various interest rates based on U.S. prime, LIBOR or FIBOR.
The company is required to pay a facility fee of between .125% to .20% on the
total amount of the commitment. Additionally, the company has a number of other
credit facilities in various currencies aggregating $5,460.

At September 30, 1997, the company had total unused lines of credit with
domestic and foreign banks aggregating $13,018, including short-term and
long-term lines of credit of $5,460 and $7,558, respectively. Under certain
long-term debt agreements, the company is required to comply with various
financial ratios and covenants. Principal payments on long-term debt are
scheduled as follows: 1998-$16, 2002-$17,442.

<PAGE>   10

During 1998, the company expects to finance capital spending and working capital
requirements with cash provided by operations. 1998 capital expenditures are
expected to approximate the 1997 level.

OUTLOOK
- -------

The company has spent a substantial amount of its resources over the past three
years to develop new products and new businesses. Sales from these new business
initiatives are beginning to ramp-up, while expenses as a percentage of net
sales are declining. Management's goal is to have each of these new businesses
at break-even by the end of 1998, which will substantially improve earnings from
1997's levels. The company's Quantox product will be the most challenging to
achieving this goal.

Additionally, the company expects to decrease debt levels during 1998.

FACTORS THAT MAY AFFECT FUTURE RESULTS
- --------------------------------------

Information included in the Letter to Shareholders and in the Outlook section of
Management's Discussion and Analysis of Financial Condition and Results of
Operations relating to expectations as to revenues, earnings, and expenses or
gross profits, constitute "forward-looking" statements, as that term is defined
in the Private Securities Litigation Reform Act of 1995. Such statements are
subject to certain risks and uncertainties that could cause actual results to
differ materially from those projected. Some of the factors that may affect
future results are discussed below.

Although the company operates in a single industry segment, certain of its
products and product lines including Quantox and the company's line of
parametric testers, are sold into the semiconductor capital equipment industry.
Growth in demand for semiconductors, new technology and pricing drive the demand
for new semiconductor capital equipment. Throughout much of the year, the order
growth of this industry had contracted which adversely affected revenues of the
company. Although order growth in this industry has recently increased, the
sustainability of this trend cannot be predicted.

The company's business relies on the development of new high technology products
and services to provide solutions to customer's complex measurement needs. This
requires anticipation of customers' changing needs and emerging technology
trends. The company must make long-term investments and commit significant
resources 

<PAGE>   11

before knowing whether its expectations will eventually result in products that
achieve market acceptance. The company incurs significant expenses developing
new business opportunities that may or may not result in significant sources of
revenue and earnings in the future.

In many cases the company's products compete directly with those offered by
other manufacturers. If any of the company's competitors were to develop
products or services that are more cost-effective or technically superior,
demand for the company's product offerings could slow.

The company currently has ten subsidiaries or sales offices located outside the
United States, and non-U.S. sales made up 45 percent of the company's revenue in
fiscal 1997. The company's future results could be adversely affected by several
factors, including changes in foreign currency exchange rates, changes in a
country's or region's political or economic conditions, trade protection
measures, import or export licensing requirements, unexpected changes in
regulatory requirements and natural disasters.


<PAGE>   12


NOTES TO CONSOLIDATED

FINANCIAL STATEMENTS

(In Thousands of Dollars Except for Per-Share Data)

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

PRINCIPLES OF CONSOLIDATION
- ---------------------------

         The consolidated financial statements include the accounts of Keithley
Instruments, Inc. and its subsidiaries. Intercompany transactions have been
eliminated. Certain amounts in prior years have been reclassified to be
consistent with the current year's presentation.

REVENUE RECOGNITION
- -------------------

         Sales are recognized at time of shipment for all products.

NATURE OF OPERATIONS
- --------------------

         The company operates in a single industry segment and is engaged in the
design, development, manufacture and marketing of complex electronic instruments
and systems. Its products provide measurement-based solutions to the
semiconductor, telecommunications and electronic conponents industries.
Engineers and scientists around the world use the company's advanced hardware
and software for process monitoring, production test and basic research. 

PRODUCT DEVELOPMENT EXPENSES
- ----------------------------

         Expenditures for product development are charged to expense as
incurred. These expenses include the cost of computer software, an integral part
of certain products. Costs defined by Statement of Financial Accounting
Standards No. 86, "Accounting for the Costs of Computer Software to Be Sold,
Leased, or Otherwise Marketed," are immaterial to the financial statements and
have been expensed as incurred. The company continually reviews the materiality
and financial statement classification of computer software expenditures.

INVENTORIES
- -----------

         Inventories are stated at the lower of cost (determined by the
first-in, first-out method) or market.

PROPERTY, PLANT AND EQUIPMENT
- -----------------------------

         Property, plant and equipment are stated at cost. Depreciation is
provided over periods approximating the estimated useful lives of the assets.
Substantially all manufacturing, laboratory and office equipment is depreciated
by the double declining balance method over periods of 3 to 10 years. Buildings
are depreciated by the straight-line method over periods of 23 to 45 years.
Leasehold improvements are amortized over the shorter of the asset lives or the
terms of the leases.


<PAGE>   13


INTANGIBLE ASSETS
- -----------------

      Intangible assets relate to business acquisitions and are amortized on a
straight-line basis over their estimated useful lives of 10 years. Management
reviews the carrying value of intangible assets using an estimated future cash
flow method (undiscounted and without interest charges) whenever events or
changes in circumstances indicate that the carrying amount of the assets may not
be recoverable. At September 30, 1996, the company wrote off the remaining
goodwill associated with its 1989 acquisition of Keithley MetraByte. (See Note
B.) 

OTHER ASSETS
- ------------

      Included in the "Other assets" caption of the Consolidated Balance Sheet
at September 30, 1997 and 1996, were $8,814 and $7,152, respectively, in
deferred tax assets. Also included in "Other assets" were pension related
assets. (See note E.) 

OTHER ACCRUED EXPENSES
- ----------------------

      Included in the "Other accrued expenses" caption of the Consolidated
Balance Sheet at September 30, 1997 and 1996, were $2,496 and $1,476,
respectively, for commissions payable to outside sales representatives of the
company. 

CAPITAL STOCK
- -------------

      The company has two classes of stock. The Class B Common Shares have ten
times the voting power of the Common Shares but are entitled to cash dividends
of no more than 80% of the cash dividends on the Common Shares. Holders of
Common Shares, voting as a class, elect one-fourth of the company's Board of
Directors and participate with holders of Class B Common Shares in electing the
balance of the Directors and in voting on all other corporate matters requiring
shareholder approval. Additional Class B Common Shares may be issued only to
holders of such Shares for stock dividends or stock splits. These Shares are
convertible at any time to Common Shares on a one-for-one basis.

      Included in the "Common shares held in treasury, at cost" caption of the
Consolidated Balance Sheet at September 30, 1997 and 1996, were Common Shares
repurchased to settle non-employee Directors' fees deferred pursuant to the
Keithley Instruments, Inc. 1996 Outside Directors Deferred Stock Plan. 

INCOME TAXES
- ------------

      Provision has been made for estimated United States and foreign
withholding taxes, less available tax credits, for the undistributed earnings of
the non-U.S. subsidiaries as of September 30, 1997.


<PAGE>   14


USE OF ESTIMATES
- ----------------

      The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the reported
financial statements and the reported amounts of revenues and expenses during
the reporting period. Actual results could differ from those estimates. NET

INCOME PER SHARE
- ----------------

      The weighted average number of shares outstanding used in determining net
income per share was 7,866,750 (7,994,881 on a fully diluted basis) in 1997,
7,822,346 in 1996 and 7,476,138 (7,719,776 on a fully diluted basis) in 1995.
Both Common Shares and Class B Common Shares are included in calculating the
weighted average number of shares outstanding. 

HEDGING AND RELATED FINANCIAL INSTRUMENTS
- -----------------------------------------

      The company utilizes foreign currency borrowings and foreign exchange
forward contracts to hedge foreign exchange risks for sales denominated in
foreign currencies and net equity or unremitted foreign earnings.

      To hedge sales, the company purchases foreign exchange forward contracts
or option contracts to sell foreign currencies to fix the exchange rates related
to near-term sales and the company's margins. Underlying hedged transactions are
recorded at hedged rates, therefore realized and unrealized gains and losses are
recorded when the operating revenue and expenses are recorded.

      To hedge equity or unremitted earnings, the company borrows foreign
currencies or purchases foreign exchange forward contracts. Realized and
unrealized after-tax gains or losses on the hedging instruments are reflected in
the cumulative translation adjustment component of shareholders' equity.

      The company has entered into swap instruments to mitigate the risk of
interest rate changes. The amounts exchanged under the swap agreements are
included in the "Net financing expenses" caption of the Consolidated Statement
of Income. The estimated fair value of the swap instruments are determined
through quotes from the related financial institutions.

      The company is exposed to credit loss in the event of nonperformance by
the counterparties to these financial instruments. Because the counterparties
are major financial institutions, the company does not expect such
nonperformance.


<PAGE>   15
OTHER ACCOUNTING PRONOUNCEMENTS
- -------------------------------

      In February 1997, the Financial Accounting Standard Board issued Statement
of Financial Accounting Standards No. 128, "Earnings per Share." The Statement
redefines earnings per share under generally accepted accounting principles, and
is effective for the company's quarter ending December 31, 1997. Early adoption
is not allowable. Under the new standard, primary earnings per share is replaced
by basic earnings per share and fully diluted earnings per share is replaced by
diluted earnings per share. The adoption of this standard is not expected to
have a significant impact on the company's previously reported earnings per
share amounts.

      In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income" (SFAS
130). This Statement establishes standards for reporting and display of
comprehensive income and its components in a full set of general-purpose
financial statements displayed with the same prominence as other financial
statements. Comprehensive income includes such items as foreign currency
translation adjustments and unrealized gains and losses from investing and
hedging activities. SFAS 130 is required to be adopted in the company's fiscal
year ending September 30, 1999.

      Also in June 1997, the Financial Accounting Standards Board issued
Statement of Financial Accounting Standards No. 131, "Disclosures about Segments
of an Enterprise and Related Information" (SFAS 131). This Statement requires
that public companies report financial and descriptive information about its
reportable operating segments. Generally, financial information is required to
be reported on the basis that is used internally for evaluating segment
performance and deciding how to allocate resources to segments. This Statement
requires that a public business enterprise report a measure of segment profit or
loss, certain specific revenue and expense items, and segment assets. It
requires that public companies report information about the revenues derived
from the company's products or services, geographic areas, and major customers.
SFAS 131 is required to be adopted in the company's fiscal year ending September
30, 1999.

      In September 1997, the American Institute of Certified Public Accountants
issued Statement of Position 97-2, "Software Revenue Recognition" (SOP 97-2).
This Statement provides guidance on when revenue should be recognized and in
what amounts for licensing, selling, leasing, and otherwise marketing computer
software. It applies to all companies that earn such revenue. It does not apply,
however, to revenue earned on products or services containing software that is
incidental to the products or services as a whole. SOP 97-2 is required to be
adopted in the company's fiscal year ending September 30, 1999. The company has
not yet determined the financial statement impact of this Statement.


<PAGE>   16


NOTE B - SPECIAL CHARGES
         An analysis of special charges recorded in the Consolidated Statement
of Income in 1997 and 1996, and the amount accrued in the Consolidated Balance
Sheet is as follows:


<TABLE>
<CAPTION>
                                                                            Accrued at
                                                  Expense                  September 30,
Description:                                1997            1996         1997          1996
- ------------                                ----            ----         ----          ----
<S>                                        <C>            <C>           <C>           <C>      
Write off of Goodwill                      $  --          $ 5,737       $  --         $  --
Severance, outplacement and
  other personnel costs                       (291)         3,433           222         3,239
Lease and related costs                       (525)           998             3           998
Impaired inventory and equipment                49            835          --            --
Relocation of facility and employees         1,073           --            --            --
Recruiting and consulting costs                187           --            --            --
Manufacturing start-up costs                   282           --            --            --
European operating subleases                    (4)           642           574           642
                                           -------        -------       -------       -------
Totals                                     $   771        $11,645       $   799       $ 4,879
                                           =======        =======       =======       =======
</TABLE>

         Since the acquisition of Keithley MetraByte in 1989, sales have
declined for the operation and earnings had been poor. In September 1996, it
became apparent to management that due to the lack of growth, the business could
not support stand-alone operations. Therefore management made the decision to
move the Taunton, Massachusetts operation to Cleveland, Ohio. Also included in
special charges is an accrual for costs to be incurred over the next 3 to 11
years under two operating subleases at the company's European facilities.

         Special charges of $771 pretax, or $.06 per share, recorded in 1997
include gross costs of $1,902 primarily for the relocation of the Keithley
MetraByte operation from Taunton, Massachusetts to Cleveland, Ohio, net of a
reversal of $1,131 of expense (noncash) recorded during 1996 primarily for
closing the Taunton facility. The reversal of 1996 expense relates to changes in
circumstances which occurred during 1997. $256 of the gross expense represents a
noncash charge to reserve for additional impaired inventory. Special charges of
$11,645 pretax, or $1.23 per share, recorded in 1996 primarily represented the
expected costs of closing the Keithley MetraByte operation in Taunton. Of the
special charges, noncash charges in 1996 total $6,572. The relocation of the
Keithley MetraByte operation was complete in July 1997, and special charges for
the relocation going forward will not be material. Approximately 130 employees
were terminated in total as a result of the relocation, 40 of which were
terminated by September 30, 1996. Total net employment for the Keithley
MetraByte operation has been reduced by approximately 70 people. At September
30, 1997 and 1996, $249 and $4,538, respectively was accrued in the Consolidated
Balance Sheet under the category "Other accrued expenses" and $550 and $341,
respectively, was accrued under the category "Other long-term liabilities."


<PAGE>   17


NOTE C - FINANCING ARRANGEMENTS
<TABLE>
<CAPTION>

                                                                                  September 30,
                                                                                  -------------
                                                                                  1997           1996
                                                                                  ----           ----
<S>                                                                             <C>             <C>     
Long-term debt:
Revolving loans with various banks with interest due monthly; principal due
March 28, 2002:
    U.S. dollar denominated loans with an interest
      rate of 6.0% based on LIBOR                                               $ 14,000        $ 10,000
    U.S. dollar denominated loans with an interest
      rate of 8.5% and 8.25% based on Prime at
      at September 30, 1997 and 1996, respectively                                   600           1,000
    Deutsche mark denominated loans with an interest
      rate of 3.75% based on FIBOR                                                 2,842           2,292
Obligations under capital leases                                                      16              77
                                                                                --------        --------
                                                                                  17,458          13,369
   Less-Current installments on long-term debt                                        16              61
                                                                                --------        --------
Total long-term debt                                                            $ 17,442        $ 13,308
                                                                                ========        ========
</TABLE>

      On March 28, 1997, the company amended its credit agreement to extend its
expiration until March 28, 2002 and generally improve the terms under which the
company borrows. The agreement continued to be a $25,000 debt facility ($17,442
outstanding at September 30, 1997), which provides unsecured, multi-currency
revolving credit at various interest rates based on Prime, LIBOR or FIBOR. The
company is required to pay a facility fee of between .125% to .20% on the total
amount of the commitment. Additionally, the company has a number of other credit
facilities in various currencies aggregating $5,460.

      At September 30, 1997, the company had total unused lines of credit with
domestic and foreign banks aggregating $13,018, including short-term and
long-term lines of credit of $5,460 and $7,558, respectively. Under certain
long-term debt agreements, the company is required to comply with various
financial ratios and covenants. Principal payments on long-term debt are
scheduled as follows: 1998-$16, 2002-$17,442.

      The LIBOR interest rate was 5.7 percent and 5.4 percent at September 30,
1997 and 1996, respectively. The FIBOR interest rate was 3.3 percent at
September 30, 1997 and 1996.

      The company has two interest rate swap agreements with commercial banks to
effectively fix its interest rates on $6,000 of variable rate debt. The first
agreement effectively fixes the interest rate on a notional $3,000 of variable
LIBOR rate debt at 6.7 percent, and expires June 17, 2002. The second agreement
effectively fixes the interest rate on another notional $3,000 

<PAGE>   18

of variable LIBOR rate debt at 6.8 percent, and expires September 18, 2005. The
interest differentials to be paid or received on the notional amounts of the
swaps are recognized over the lives of the agreements. At September 30, 1997
interest rate levels, the swaps require the company to make payments to the bank
and would cost the company approximately $30 to terminate.

      Following is an analysis of Net financing expenses:
<TABLE>
<CAPTION>
                                                                 1997              1996             1995
                                                                 ----              ----             ----
<S>                                                              <C>              <C>               <C>   
Interest expense                                                 $1,315           $  957            $1,092
Investment income                                                  (170)            (138)             (106)
                                                                 ------            -----            ------
                                                                 $1,145           $  819            $  986
                                                                  =====            =====             =====
</TABLE>



<PAGE>   19


NOTE D - FOREIGN CURRENCY
      The functional currency for the company's foreign subsidiaries is the
applicable local currency. Income and expenses are translated into U.S. dollars
at average exchange rates for the period. Assets and liabilities are translated
at the rates in effect at the end of the period. Translation gains and losses
are recognized in the cumulative translation component of shareholders' equity.

      Certain transactions of the company and its foreign subsidiaries are
denominated in currencies other than the functional currency. The Consolidated
Statement of Income includes gains (losses) from such foreign exchange
transactions of $95, $91 and $(22) for 1997, 1996 and 1995, respectively.

      At September 30, 1997, the company had obligations under foreign exchange
forward contracts to sell 2,100,000 Deutsche marks, 140,000 British pounds,
2,200,000 French francs at various dates through December 1997. The total U.S.
dollar equivalent amount of these foreign exchange contracts of $1,744 includes
an unrecognized loss of $48 at September 30, 1997.

      The company has purchased and written currency option contracts that
effectively provide minimum and maximum exchange rates that the company would
receive for anticipated foreign currency denominated sales. Under the terms of
the options, the company has the right to deliver 3,000,000 Deutsche marks at
average rates of 1.91 per U.S. dollar and the obligation, if called, to deliver
4,500,000 Deutsche marks at average rates of 1.73 per U.S. dollar. The options
expire in October and December 1997 and January 1998. The options had no effect
on net income in fiscal 1997, and gains and losses on the options, if any, are
recorded as incurred.


<PAGE>   20


NOTE E - EMPLOYEE BENEFIT PLANS

      The company has non-contributory defined benefit pension plans covering
all of its eligible employees in the United States and certain non-U.S.
employees. Pension benefits are based upon the employee's length of service and
a percentage of compensation above certain base levels. Pension expense for
these plans is shown below:

<TABLE>
<CAPTION>
                                                                        1997            1996              1995
                                                                        ----            ----              ----
<S>                                                                   <C>               <C>            <C>    
      Service cost-benefits earned during the period                  $   733           $   652        $   605
      Interest cost on projected benefit obligation                     1,192             1,048            945
      Actual return on assets                                          (3,470)           (2,471)        (1,818)
      Net amortization and deferral                                     2,115             1,328            884
                                                                       ------            ------         ------
      Net periodic pension cost                                       $   570           $   557        $   616
                                                                       ======            ======         ======
</TABLE>

      The following table sets forth the funded status of the company's plans
and the related amounts recognized in the Consolidated Balance Sheet at
September 30, 1997 and 1996:

<TABLE>
<CAPTION>
                                                                                        Non-U.S.
                                                     United States Plan                   Plan
                                                         Overfunded                    Underfunded*
                                                    ---------------------              ------------
                                                      1997          1996         1997           1996
                                                      ----          ----         ----           ----
Actuarial present value of benefit obligations:
<S>                                                 <C>           <C>           <C>           <C>     
Vested benefit obligation                           $ 11,459      $ 10,439      $  1,694      $  1,678
                                                    ========      ========      ========      ========
Accumulated benefit obligation                      $ 12,094      $ 10,890      $  1,917      $  1,899
                                                    ========      ========      ========      ========
Projected benefit obligation                        $ 14,763      $ 13,280      $  2,777      $  2,732
Plan assets at fair value                           $ 19,474      $ 16,385      $    498      $    498
                                                    --------      --------      --------      --------
Projected benefit obligation (in excess of)
   or less than plan assets                         $  4,711      $  3,105      $ (2,279)     $ (2,234)
Unrecognized net gain                                 (3,824)       (1,972)         (331)         (567)
Unrecognized prior service cost                        1,149         1,263            64            79
Unrecognized initial net (asset) obligation             (358)         (401)          211           265
                                                    --------      --------      --------      --------
Prepaid pension assets (pension liability)
   recognized in the Consolidated Balance
   Sheet                                            $  1,678      $  1,995      $ (2,335)     $ (2,457)
                                                    ========      ========      ========      ========

<FN>
*     The company has purchased indirect insurance of $2,409 which is expected to be available to the
      company as non-U.S. pension liabilities of $2,335 mature. The caption, "Other assets," on the
      company's Consolidated Balance Sheet includes $2,409 and $2,514 at September 30, 1997 and 1996,
      respectively, for this asset. In accordance with 
</TABLE>
<PAGE>   21
      Statement of Financial Accounting Standards No. 87, "Employers' Accounting
      for Pensions," this company asset is not included in the non-U.S. plan
      assets.

      The significant actuarial assumptions as of the year-end measurement date
were as follows:

<TABLE>
<CAPTION>
                                                                          1997           1996         1995
                                                                          ----           ----         ----
<S>                                                                       <C>            <C>          <C> 
United States Pension Plan:
Discount rates                                                            7.5%           7.5%         7.5%
Expected long-term rate of return on plan assets                          8.5%           8.5%         8.5%
Rate of increase in compensation levels                                   5.5%           5.5%         5.5%

Non-U.S. Pension Plan:
Discount rates                                                           6.25%           6.5%         7.5%
Expected long-term rate of return on plan assets                          7.0%           7.0%         7.0%
Rate of increase in compensation levels                                   3.5%           3.5%         4.5%
</TABLE>

      The "Projected Unit Credit" Actuarial Cost Method is used to determine the
company's annual expense.

      For the United States plan, the company uses the "Entry Age Normal"
Actuarial Cost Method to determine its annual funding requirements. United
States plan assets are invested primarily in common stocks and fixed-income
securities.

      Although there are no requirements for the company to fund the non-U.S.
pension plan, the company has made contributions in the past. Non-U.S. plan
assets represent employee and company contributions and are invested in a direct
insurance contract payable to the individual participants.

      In addition to the defined benefit pension plan, the company also
maintains a retirement plan for substantially all of its employees in the United
States under Section 401(k) of the Internal Revenue Code. The company makes
contributions to the 401(k) plan, and expense for this plan amounted to $403,
$388 and $539 in 1997, 1996 and 1995, respectively.

      The company also has an unfunded supplemental executive retirement plan
(SERP) for an officer and for former key employees which includes retirement,
death and disability benefits. The officer took early retirement causing a
reversal of previously accrued expense in 1997. Expense (income) recognized for
these benefits was $(3) for 1997, $102 for 1996 and $85 for 1995. Liabilities of
$489 and $497 were accrued in the "Other long-term liabilities" caption on the
company's Consolidated Balance Sheet to meet all SERP obligations at September
30, 1997 and 1996, respectively.


<PAGE>   22


NOTE F - STOCK PLANS
Stock Option Plans
- ------------------
      Under the 1984 Stock Option Plan and the 1992 Stock Incentive Plan,
675,000 and 1,900,000 of the company's Common Shares, respectively, were
reserved for the granting of options to officers and other key employees. After
February 11, 1994, no new grants could be issued from the 1984 Stock Option
Plan. The Compensation and Human Resources Committee administers the plans with
incentive stock options granted at not less than fair market price at the date
of the grant for an exercise period not to exceed ten years from the grant date.
Such grants generally become exercisable over a four year period. The option
price under a nonqualified stock option is determined by the Committee on the
date the option is granted. The 1992 Stock Incentive Plan also provides for
restricted stock awards and stock appreciation rights. This plan will expire on
February 8, 2002. All options outstanding at the time of termination of either
plan shall continue in full force and effect in accordance with their terms.

       Subject to shareholder approval in February 1998, the Company's Board of
Directors adopted the 1997 Directors' Stock Option Plan. This Plan provides for
the issuance of 200,000 of the company's Common Shares to non-employee
Directors. Under the terms of the plan, each non-employee Director is
automatically granted an option to purchase 5,000 Common Shares at the close of
each annual shareholders' meeting. The plan will expire on February 15, 2007.
All options outstanding at the time of termination of the plan shall continue in
full force and effect in accordance with their terms. On February 15, 1997, the
company's Board of Directors terminated the 1992 Directors' Stock Option Plan.
Prior to its termination, this plan provided for the issuance of 60,000 of the
company's Common Shares to non-employee Directors, with each non-employee
Director automatically granted an option to purchase 600 Common Shares at the
close of each annual shareholders' meeting. The option price for grants under
both Plans is the fair market value of a Common Share on the date of grant. The
options under both plans are exercisable six months and one day after the date
of grant and will expire after ten years.


<PAGE>   23


   The activity under the option plans, combined, was as follows:

<TABLE>
<CAPTION>
                                                Outstanding                     Exercisable
                                                -----------                     -----------
                                                             Weighted                    Weighted
                                                             Average                      Average
                                                 Number      Exercise         Number      Exercise
                                               of Shares      Price         of Shares      Price
                                               ---------      -----         ---------      -----
<S>                                            <C>             <C>            <C>          <C>  
September 30, 1994                               848,888       $ 5.23         306,892      $5.73
 Options granted at fair market value            237,500        13.44
 Options granted below fair market value           1,800        13.52
 Options exercised                               (96,408)        5.09
 Options forfeited                                (5,792)        5.35
                                          -------------------------------------------------------

September 30, 1995                               985,988         7.23         303,030       5.74
 Options granted at fair market value            359,400         9.93
 Options granted below fair market value          14,560                                    --
 Options exercised                              (149,373)        4.90
 Options forfeited                               (38,586)        8.01
                                          -------------------------------------------------------

September 30, 1996                             1,171,989         8.24         400,044       5.45
 Options granted at fair market value            310,000        11.18
 Options granted above fair market value           1,100        11.54
 Options granted below fair market value          82,528                                    --
 Options exercised                              (124,873)        1.70
 Options forfeited                               (37,212)        9.23
                                          -------------------------------------------------------

September 30, 1997                             1,403,532       $ 8.97         593,607      $7.01
                                          =======================================================
</TABLE>

      The options outstanding at September 30, 1997 have been segregated into
ranges for additional disclosure as follows:

<TABLE>
<CAPTION>
                                          Outstanding                                      Exercisable        
                                          Weighted 
                                          Average                Weighted                           Weighted  
                        Number of         Remaining              Average           Number of        Average   
Range of Exercise       Shares            Contractual            Exercise          Shares           Exercise  
Prices                  Outstanding       Life                   Price             Exercisable      Price     
- ------                  -----------       ----                   -----             -----------      -----     
<S>                      <C>              <C>                    <C>               <C>              <C>       
$4.00 - $4.88              297,707        6.30 years             $ 4.75            232,957          $ 4.73    
$5.00 - $9.06              269,025        4.03 years             $ 6.20            253,400          $ 6.26    
$9.25 - $9.25              310,500        8.94 years             $ 9.25                  0            --   
$10.00 - $13.52            284,400        9.94 years             $11.44                900          $13.52    
$13.69 - $15.69            241,900        8.00 years             $13.96            106,350          $13.72    
                        ----------        ----------             ------            -------          ------    
                         1,403,532        7.48 years             $ 8.97            593,607          $ 7.01    
                        ==========        ==========             ======            =======          ======    
                                                                 
</TABLE>

<PAGE>   24



1993 Employee Stock Purchase Plan
- ---------------------------------
On February 5, 1994, the company's shareholders approved the 1993 Employee Stock
Purchase and Dividend Reinvestment Plan. The plan offers eligible employees the
opportunity to acquire the company's Common Shares at a discount and without
transaction costs. Eligible employees can only participate in the plan on a
year-to-year basis, must enroll prior to the commencement of each plan year, and
in the case with U.S. employees, must authorize monthly payroll deductions.
Foreign employees submit their contribution at the end of the plan year. The
purchase price of the Common Shares is 85 percent of the lower market price at
the beginning or ending of the calendar plan year. A total of 750,000 Common
Shares are available for purchase under the plan. Total shares may be increased
with shareholder approval or the plan may be terminated when the shares are
fully subscribed. No compensation expense is recorded in connection with the
plan. During 1997 and 1996, 94,227 and 74,156 shares had been purchased by
employees at prices of $7.86 and $4.25 per share, respectively.

Pro Forma Disclosure
- --------------------
       As of September 30, 1997, the company had various stock-based
compensation plans which are described above. The company has elected to
continue to account for stock issued to employees according to APB Opinion 25,
"Accounting for Stock Issued to Employees" and its related interpretations.
Under APB No. 25, no compensation expense is recognized in the company's
consolidated financial statements for employee stock options except in certain
cases when stock options are granted below the market price of the underlying
stock on the date of grant. During 1997, $187 was recognized in compensation
expense for such grants. Alternatively, under the fair value method of
accounting provided for under Statement of Financial Accounting Standards No
123, "Accounting for Stock-Based Compensation" (SFAS 123), the measurement of
compensation expense is based on the fair value of employee stock options or
purchase rights at the grant or right date and requires the use of option
pricing models to value the options.

      The weighted average fair value of options granted under stock options
plans in 1997 and 1996 was $4.97 and $4.34, respectively. The fair value of
options at date of grant was estimated using the Black-Scholes model with the
following weighted average assumptions:

<TABLE>
<CAPTION>
                                             1997               1996
                                             ----               ----
<S>                                         <C>                <C>  
Expected life (years)                       5.0                4.6
Risk-free interest rate                     6.0%               6.4%
Volatility                                 41.5%              41.5%
Dividend yield                              1.3%               1.3%
</TABLE>
     
<PAGE>   25
      The weighted average fair value of purchase rights granted under the 1993
Employee Stock Purchase Plan in 1997 and 1996 was $3.05 and $5.49, respectively.
The fair value of employees' purchase rights was estimated using the
Black-Scholes model with the following assumptions:

<TABLE>
<CAPTION>
                                             1997              1996
                                             ----              ----
<S>                                         <C>                <C>  
Expected life (years)                        1.0                1.0
Risk-free interest rate                      5.5%               4.9%
Volatility                                  41.5%              41.5%
Dividend yield                               1.3%               1.3%
</TABLE>

       The pro forma impact to both net income and net income per share from
calculating stock-related compensation expense consistent with the fair value
alternative of SFAS 123 is indicated below:

<TABLE>
<CAPTION>
                                          1997                1996
<S>                                       <C>              <C>     
Pro forma net income                      $214             $(5,704)
Pro forma net income per share            $.03             $  (.73)
</TABLE>

       For purposes of the pro forma disclosures, the estimated fair value of
the stock-based awards is amortized over the vesting period. The effects of
applying SFAS 123 in this pro forma disclosure are not indicative of future
amounts, because SFAS 123 is applicable only to awards made after fiscal 1995.


<PAGE>   26


NOTE G - INCOME TAXES
      For financial reporting purposes, income (loss) before income taxes
includes the following components:

<TABLE>
<CAPTION>
                                                          1997           1996         1995
                                                          ----           ----         ----
<S>                                                      <C>           <C>           <C>   
      United States                                      $  (892)      $(9,383)      $ 1,970
      Non-U.S                                              2,103         3,059         4,452
                                                         -------       -------       -------
                                                         $ 1,211       $(6,324)      $ 6,422
                                                         =======       =======       =======
      The provision for income taxes is as follows:
                                                            1997          1996          1995
                                                         -------       -------       -------
Current:
      Federal                                            $   275       $ 1,330       $   720
      Non-U.S                                              1,091         1,513         1,859
      State and local                                        195            45           146
                                                         -------       -------       -------
      Total current                                        1,561         2,888         2,725
                                                         -------       -------       -------
Deferred:
      Federal                                             (1,124)       (3,800)       (1,199)
      Non-U.S                                                (16)           28           (18)
                                                         -------       -------       -------
      Total deferred                                      (1,140)       (3,772)       (1,217)
                                                         -------       -------       -------
      Total provision (benefit)                          $   421       $  (884)      $ 1,508
                                                         =======       =======       =======
</TABLE>

      Differences between the statutory United States federal income tax and the
effective income tax rate are as follows:

<TABLE>
<CAPTION>
                                              1997          1996           1995
                                              ----          ----           ----
<S>                                         <C>           <C>           <C>    
Federal income tax at statutory rate        $   412       $(2,150)      $ 2,183
State and local income taxes                    129            30            96
Tax on non-U.S. income and tax credits         (945)         (884)         (881)
Non-deductible amortization                    --           2,123           158
Terminated life insurance contract              877          --            --
Other                                           (52)           (3)          (48)
                                            -------       -------       -------
Effective income tax (benefit)              $   421       $  (884)      $ 1,508
                                            =======       =======       =======
</TABLE>



<PAGE>   27


      Significant components of the company's deferred tax assets and
liabilities as of September 30, 1997 and 1996 are as follows:

<TABLE>
<CAPTION>

Deferred tax assets:                                 1997             1996
- --------------------                                 ----             ----

<S>                                               <C>            <C>     
Capitalized research and development              $  6,589       $  5,221
Special charges                                        184          1,724
Intangibles                                            832          1,006
State and local taxes                                1,471          1,441
Alternative minimum tax credit carryforwards         1,276          1,174
Deferred compensation                                  558            615
Inventory                                            1,597          1,124
General business credit carryforwards                1,058            872
Other                                                1,909          1,252
                                                  --------       --------
Total deferred tax assets                           15,474         14,429
                                                  --------       --------
Valuation allowance for deferred tax assets         (3,166)        (2,994)
                                                  --------       --------
                                                    12,308         11,435
                                                  --------       --------

Deferred tax liabilities:
Pension contribution                                   818            904
Other                                                  170            351
                                                  --------       --------
Total deferred tax liabilities                         988          1,255
                                                  --------       --------
Net deferred tax assets                           $ 11,320       $ 10,180
                                                  ========       ========
</TABLE>

      The valuation allowance relates to tax credit carryforwards which will
likely not be realized. The current year increase relates primarily to an
increase in deferred state tax items.

      At September 30, 1997, the Company had capital loss and tax credit
carryforwards as follows:

<TABLE>
<CAPTION>

                                                                                 Year Expiration
                                                                                   Commences
                                                                                ---------------
<S>                                                         <C>                       <C> 
General business credit                                     $1,058                    2002
Capital loss                                                   123                    1998
Alternative minimum tax credit                               1,276                  Indefinite
</TABLE>



<PAGE>   28


NOTE H - LEASES
      The company leases certain equipment under capital leases. Manufacturing,
laboratory and office equipment includes $526 of leased equipment at September
30, 1997 and 1996. Accumulated depreciation includes $510 and $487 at September
30, 1997 and 1996, respectively, related to these leases. The company also
leases certain office and manufacturing facilities and office equipment under
operating leases. Rent expense under operating leases (net of sublease income of
$84 in 1997, $245 in 1996 and $282 in 1995) for 1997, 1996 and 1995 was $2,658,
$2,178 and $2,119, respectively. Future minimum lease payments under operating
leases are:
<TABLE>
<CAPTION>
<S>   <C>                                                        <C>   
      1998                                                       $2,063
      1999                                                        1,820
      2000                                                        1,656
      2001                                                        1,198
      2002                                                          701
      After 2002                                                  2,507
                                                                  -----
Total minimum operating lease payments                           $9,945
                                                                 ======
</TABLE>



<PAGE>   29


NOTE I - GEOGRAPHIC SEGMENTS
      The company operates in a single industry segment and is engaged in the
design, development, manufacture and marketing of complex electronic instruments
and systems. The operations by geographic area are presented below:

<TABLE>
<CAPTION>
                                                                1997            1996           1995
                                                                ----            ----           ----
NET SALES, INCLUDING INTERCOMPANY SALES:
- ----------------------------------------
<S>                                                         <C>             <C>             <C>      
United States (1)                                           $ 106,217       $  98,232       $  88,410
Europe                                                         31,606          37,799          37,659
Intercompany                                                  (14,528)        (17,085)        (16,495)
                                                            ---------       ---------       ---------
Net sales                                                   $ 123,295       $ 118,946       $ 109,574
                                                            =========       =========       =========
INCOME (LOSS) BEFORE INCOME TAXES (2):
United States                                               $   1,889       $  (7,372)      $   4,282
Europe                                                          2,236           3,180           4,158
Adjustments/eliminations                                         (219)            (34)             77
                                                            ---------       ---------       ---------
                                                                3,906          (4,226)          8,517
                                                            ---------       ---------       ---------
Corporate expenses                                             (1,550)         (1,279)         (1,109)
Net financing expenses                                         (1,145)           (819)           (986)
                                                            ---------       ---------       ---------
Income (loss) before income taxes                           $   1,211       $  (6,324)      $   6,422
                                                            =========       =========       =========
IDENTIFIABLE ASSETS:
United States                                               $  61,264       $  54,507       $  49,087
Europe                                                          9,120           9,720          11,164
Adjustments/eliminations                                       (4,979)         (5,651)         (5,429)
                                                            ---------       ---------       ---------
                                                               65,405          58,576          54,822
Corporate assets                                               13,708          15,258          11,287
                                                            ---------       ---------       ---------
Total assets                                                $  79,113       $  73,834       $  66,109
                                                            =========       =========       =========

<FN>
(1) U.S. sales include $24,186, $21,295 and $18,793 in export sales to markets other than Europe in
1997, 1996 and 1995, respectively.

(2) 1997 and 1996 income (loss) before income taxes includes special charges (benefit) of $775 and
$11,003 in the U.S., and $(4) and $642 in Europe, respectively. (See Note B.)
</TABLE>

        Intercompany sales were at cost plus a negotiated markup. Assets of
geographic areas are identified with the operations of each area. Corporate
assets consist of cash and cash equivalents, other receivables, prepaid expenses
and deferred income taxes.


<PAGE>   30


NOTE J - CONTINGENCIES
      The company is engaged in various legal proceedings arising in the
ordinary course of business. The ultimate outcome of these proceedings is not
expected to have a material adverse effect on the company's financial position,
results of operations or cash flows.



<PAGE>   31


                        Report of Independent Accountants
                        ---------------------------------


To the Board of Directors and Shareholders of
Keithley Instruments, Inc.


      In our opinion, the accompanying consolidated balance sheets and the
related consolidated statements of income and shareholders' equity and of cash
flows present fairly, in all material respects, the financial position of
Keithley Instruments, Inc. and its subsidiaries at September 30, 1997 and 1996,
and the results of their operations and their cash flows for each of the three
years in the period ended September 30, 1997, in conformity with generally
accepted accounting principles. These financial statements are the
responsibility of the company's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with generally accepted auditing
standards which require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above.


PRICE WATERHOUSE LLP



Cleveland, Ohio
November 17, 1997



<PAGE>   32


                     Statement of Management Responsibility
                     --------------------------------------


      The consolidated financial statements of Keithley Instruments, Inc. were
prepared by management and, accordingly, management is responsible for their
accuracy and objectivity. The company utilizes accounting policies which are, in
the judgment of management, the most appropriate for the company's
circumstances. Certain estimates and judgments are required in the preparation
of financial statements. The financial information included in this Annual
Report has been prepared using management's best estimates, which were based
upon appropriate research and investigation.

      The company maintains internal accounting control systems that are
designed to detect and correct material misstatements of financial information.
These systems are regularly modified in response to the company's changing
business conditions. Additionally, our independent accountants, Price Waterhouse
LLP, obtain a sufficient understanding of the internal control structure in
order to plan and complete the annual audit of the company's financial
statements.

      The Audit Committee of the Board of Directors, which consists of three
Directors otherwise independent of the company, serves an oversight role in
reviewing the internal control monitoring process. The Committee regularly meets
with and has direct access to Price Waterhouse LLP.

      Management acknowledges its responsibility to provide financial
information (both audited and unaudited) that is representative of the company's
operations and financial position, prepared on a consistent basis and relevant
for a meaningful appraisal of the company.



Joseph P. Keithley                               Ronald M. Rebner
Chairman, President                              Vice President and Chief
and Chief Executive Officer                      Financial Officer



<PAGE>   33


Stock Market Price and Cash Dividends


      Since November 28, 1995, the company's Common Shares have traded on the
New York Stock Exchange under the symbol KEI. Prior to November 28, 1995, the
company's Common Shares traded on the American Stock Exchange under the symbol
KEI. The high and low prices shown below are sales prices of the company's
Common Shares as reported on the NYSE or the AMEX. There is no established
public trading market for the company's Class B Common Shares; however, they are
readily convertible on a one-to-one basis for Common Shares.

<TABLE>
<CAPTION>
                                                                                       Cash Dividends
                                                              Cash Dividends             Per Class B
Fiscal 1997                   High            Low            Per Common Share           Common Share
- -----------                   ----            ---            ----------------           ------------

<S>                          <C>             <C>                <C>                       <C>    
First Quarter                $11 1/8         $7 3/8             $  .031                   $  .025
Second Quarter                 9 3/8          7 3/4                .031                      .025
Third Quarter                 12              7 5/8                .031                      .025
Fourth Quarter                12 3/8         10 1/8                .031                      .025

Fiscal 1996

First Quarter               $18             $14                 $  .031                   $  .025
Second Quarter               16 7/8          12 7/8                .031                      .025
Third Quarter                19 1/8          12 5/8                .031                      .025
Fourth Quarter               14 1/4           8 3/8                .031                      .025

</TABLE>


<PAGE>   34


Unaudited Quarterly Results of Operations
(In Thousands of Dollars Except for Per-Share Data)

<TABLE>
<CAPTION>

                                                                    First          Second         Third          Fourth
                                                                    -----          ------         -----          -------
Fiscal 1997
- -----------

<S>                                                                <C>            <C>            <C>            <C>     
Net sales                                                          $ 27,886       $ 28,148       $ 32,410       $ 34,851

Gross profit                                                         16,132         16,402         18,514         20,323

Income (loss) before income taxes (1) (2)                            (1,171)          (464)         1,088          1,758

Net income (loss) (1) (2)                                              (838)          (338)           761          1,205

Net income (loss) per share (primary and fully diluted)(1)(2)
                                                                       (.11)          (.04)           .10            .15
Fiscal 1996

Net sales                                                          $ 29,823       $ 30,019       $ 29,403       $ 29,701

Gross profit                                                         17,988         19,052         18,027         17,739

Income (loss) before income taxes (1)                                 1,659          2,045          1,006        (11,034)

Net income (loss) (1)                                                 1,145          1,485            761         (8,831)

Net income (loss) per share (primary and fully diluted) (1)
                                                                        .15            .19            .10          (1.14)

<FN>
(1) Includes special charges as follows:

  1997 Special charges pretax                                      $     58       $    375       $    306       $     32      
  1997 Special charges per share                                       --             (.03)          (.02)          --        
  1996 Special charges pretax                                          --             --             --           11,645      
  1996 Special charges per share                                       --             --             --            (1.23)  
                                                                   

(2)The fourth quarter includes pretax charges of $512 for non-recurring
   officer retirement expenses.
</TABLE>

<PAGE>   35
<TABLE>
<CAPTION>

Eleven Year Summary
(In Thousands Of Dollars Except For Per-Share Data)

For the year ended September 30,                            1997             1996            1995           1994       1993(b)    
- ----------------------------------------------------------------------------------------------------------------------------------

<S>                                                     <C>                    <C>             <C>            <C>           <C>   
Operating Results
 Net sales                                              $123,295          118,946         109,574         89,248        91,146    
 Income (loss) before income taxes and
  cumulative effect of accounting change                   1,211           (6,324)          6,422            124         5,530    
 Net income (loss)                                           790           (5,440)          4,914            907         4,784    
 Net income (loss) per share (a)                            0.10            (0.70)           0.66           0.13          0.68    
 Fully diluted net income (loss) per share (a)              0.10            (0.70)           0.64           0.13          0.68    

Common Stock Information (a)
 Cash dividends per Common Share                        $  0.125            0.125           0.106          0.100         0.100    
 Cash dividends per Class B Common Share                $  0.100            0.100           0.085          0.080         0.080    
 Weighted average number of shares
  outstanding- fully diluted (in thousands)                7,995            7,822           7,720          7,088         7,061    
 At fiscal year-end:
  Dividend payout ratio (d)                                125.0%            --              16.1%          76.9%         14.7%   
  Price/earnings ratio (d)                                 120.0             --              23.3           40.4           7.4    
  Shareholders' equity per share                        $   4.26             4.26            5.11           4.50          4.45    
  Closing market price                                  $ 12.000            8.875          14.938          5.250         5.000    

Balance Sheet Data
 Total assets                                           $ 79,113           73,834          66,109         54,410        52,413    
 Current ratio                                               1.9              1.7             2.0            1.9           2.2    
 Total debt                                             $ 17,458           13,369           6,113          4,816         6,518    
 Total debt-to-capital                                      34.8%            29.6%           14.2%          13.1%         17.2%   
 Shareholders' equity                                   $ 32,683           31,756          36,902         31,946        31,415    

Other Data
 Return on average shareholders' equity                      2.5%           -15.8%           14.3%           2.9%         16.0%   
 Return on average total assets                              1.0%            -7.8%            8.2%           1.7%          9.1%   
 Return on net sales                                         0.6%            -4.6%            4.5%           1.0%          5.2%   
 Number of employees                                         693              716             659            625           625    
 Sales per employee                                     $  175.0            173.0           170.7          142.8         139.8    
 Cash flow
  Noncash charges to income (c)                         $  3,390            7,064           2,573          1,346         1,849    
  Net cash provided by (used in) operating activities   ($ 1,011)           2,600           2,457          6,641         6,289    
 Ten-year compound annual growth rate
  Net sales                                                  7.9%             9.6%            8.8%           7.0%         10.0%   
  Net income (d)                                           -13.3%            --               5.7%         -14.2%          9.1%   

Eleven Year Summary
(In Thousands Of Dollars Except For Per-Share Data)

For the year ended September 30,                         1992          1991         1990         1989         1988         1987
- ---------------------------------------------------------------------------------------------------------------------------------

Operating Results
 Net sales                                             94,666        99,497      100,593       88,728       72,282       57,652
 Income (loss) before income taxes and
  cumulative effect of accounting change              (10,420)        6,816        5,675        7,311        8,204        5,209
 Net income (loss)                                    (12,453)        4,233        3,378        4,131        5,414        3,280
 Net income (loss) per share (a)                        (1.77)         0.60         0.48         0.59         0.78         0.49
 Fully diluted net income (loss) per share (a)          (1.77)         0.60         0.48         0.59         0.78         0.49

Common Stock Information (a)
 Cash dividends per Common Share                        0.100         0.094        0.089        0.082        0.058        0.046
 Cash dividends per Class B Common Share                0.080         0.075        0.071        0.066        0.046        0.036
 Weighted average number of shares
  outstanding- fully diluted (in thousands)             7,046         7,026        7,014        6,994        6,974        6,790
 At fiscal year-end:
  Dividend payout ratio (d)                              --            15.7%        18.5%        13.9%         7.4%         9.4%
  Price/earnings ratio (d)                               --            10.1          8.5         11.0         11.5         17.5
  Shareholders' equity per share                         4.05          5.85         5.40         4.88         4.37         3.68
  Closing market price                                  4.563         6.063        4.063        6.500        8.938        8.500

Balance Sheet Data
 Total assets                                          53,160        66,637       69,205       69,917       46,602       44,268
 Current ratio                                            2.3           2.1          2.3          2.7          2.4          1.9
 Total debt                                             8,978        10,506       16,562       22,419        2,027        5,773
 Total debt-to-capital                                   23.9%         20.3%        30.4%        39.6%         6.2%        18.4%
 Shareholders' equity                                  28,530        41,129       37,870       34,216       30,518       25,577

Other Data
 Return on average shareholders' equity                -35.8%          10.7%         9.4%        12.7%        19.0%        14.5%
 Return on average total assets                        -20.8%           6.2%         4.9%         7.1%        11.9%         8.5%
 Return on net sales                                   -13.2%           4.3%         3.4%         4.7%         7.5%         5.7%
 Number of employees                                      679           716          750          742          579          523
 Sales per employee                                     135.7         135.7        134.8        134.3        131.2        115.1
 Cash flow
  Noncash charges to income (c)                        15,185         4,325        6,649        4,234        3,062        2,516
  Net cash provided by (used in) operating activities   4,475         9,399        9,111        4,592        6,812        5,741
 Ten-year compound annual growth rate
  Net sales                                              11.1%         12.8%        13.7%        16.4%        17.9%        19.2%
  Net income (d)                                         --            39.7%        10.4%        12.5%        21.2%        19.8%

<FN>
(a)  Share data adjusted for two-for-one stock split in November 1995, three-for-two stock split in 1987 and three-for-one stock
     split in 1985.
(b)  Includes a benefit for the cumulative effect of adopting FAS 109 of $1,447 or $.21 per share.
(c)  Noncash charges to income include depreciation, amortization, deferred compensation, deferred taxes, noncash special charges
     and the cumulative effect of adopting FAS 109.
(d)  These ratios are not meaningful in 1992 and 1996 due to reported net losses.

</TABLE>

<PAGE>   1
21. Subsidiaries of the registrant



                            WHOLLY OWNED SUBSIDIARIES
                            -------------------------

Keithley International Investment Corporation
28775 Aurora Road, Cleveland, Ohio 44139, U.S.A.

Keithley Foreign Sales Corporation
5 Norre Gade, Charlotte Amalie
St. Thomas, U.S. Virgin Islands 00801

FRANCE:  Keithley Instruments SARL
BP 60, 3 allee des Garays
91122 Palaiseau Cedex

GERMANY:  Keithley Instruments GmbH
Landsberger Strasse 65
82110 Germering (Munich)

GREAT BRITAIN:  Keithley Instruments Ltd.
The Minister, 58 Portman Road
Reading (London), Berkshire RG30 1EA

ITALY:  Keithley Instruments SRL
Viale San Gimignano 38
20146 Milano

NETHERLANDS:  Keithley Instruments BV
Avenlingen West 49
4202 MS Gorinchem (Amsterdam)

SWITZERLAND:  Keithley Instruments SA
Kriesbachstrasse 4
8600 Dubendorf (Zurich)



<PAGE>   1
23. Consent of experts



                       CONSENT OF INDEPENDENT ACCOUNTANTS
                       ----------------------------------

We hereby consent to the incorporation by reference in the Registration
Statement on Form S-8 (No. 33-2496) of Keithley Instruments, Inc. of our report
dated November 17, 1997 appearing on page 30 of the Annual Report to
Shareholders which is incorporated in this Annual Report on Form 10-K. We also
consent to the incorporation by reference of our report on the Financial
Statement Schedule, which appears on page 20 of this Form 10-K.




PRICE WATERHOUSE LLP

Cleveland, Ohio
December 22, 1997



<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             OCT-01-1996
<PERIOD-END>                               SEP-30-1997
<CASH>                                           1,727
<SECURITIES>                                         0
<RECEIVABLES>                                   25,788
<ALLOWANCES>                                       675
<INVENTORY>                                     16,579
<CURRENT-ASSETS>                                46,526
<PP&E>                                          41,527
<DEPRECIATION>                                  24,272
<TOTAL-ASSETS>                                  79,113
<CURRENT-LIABILITIES>                           25,054
<BONDS>                                         17,442
                                0
                                          0
<COMMON>                                           192
<OTHER-SE>                                      32,491
<TOTAL-LIABILITY-AND-EQUITY>                    79,113
<SALES>                                        123,295
<TOTAL-REVENUES>                               123,295
<CGS>                                           51,924
<TOTAL-COSTS>                                   51,924
<OTHER-EXPENSES>                                17,233
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,145
<INCOME-PRETAX>                                  1,211
<INCOME-TAX>                                       421
<INCOME-CONTINUING>                                790
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       790
<EPS-PRIMARY>                                     0.10
<EPS-DILUTED>                                     0.10
        

</TABLE>


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