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Exhibit 10(dd)
 KEITHLEY INSTRUMENTS. INC
 DEFERRED COMPENSATION PLAN
  1.
    
    DefinitionsWhenever used in the Deferred Compensation Plan and the applicable forms under the Plan,
namely, the Irrevocable Election to Participate and the Beneficiary Designation, the
following terms shall have the respective meanings set forth below unless otherwise
expressly provided, and when the defined meaning is intended, the term is capitalized:
 a.
    
    Account  means the bookkeeping liability established to reflect each
Participants deferred compensation together with interest thereon.b.
    
    Board  means the Board of Directors of Keithley Instruments, Inc.c.
    
    Bonus  means any cash bonus which may be payable to an Employee.d.
    
    Committee  means the Compensation Committee of the Board or such other
Committee composed of no fewer than three (3) members as may be designated by the Board
to administer this Plan.e.
    
    Company  means Keithley Instruments, Inc., or any successor thereto.f.
    
    Employee  means an individual who is employed by the Company or a Subsidiary
on a full-time basis in a managerial or executive capacity.g.
    
    Irrevocable Election to Participate or Irrevocable Election Agreement  means
the irrevocable election agreement which must be executed by a Participant in order for
the Employee to participate in any Year.
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h.
    
    Participant  means an Employee who may receive a Performance Award or other
Supplemental Compensation in any Year and who has been designated by the Committee or
its designate(s) as eligible for participation in the Plan for that Year.i.
    
    Performance Award  means any cash bonus or Performance Award which may be
payable to an Employee.j.
    
    Plan  means this Deferred Compensation Plan as it may be amended from time to
time.k.
    
    Retirement  means the date of retirement according to the terms of the
Companys Employees Pension Plan or the terms of any Subsidiarys pension plan.l.
    
    Subsidiary  means any corporation at least fifty
percent (50%) of the voting shares of which is owned by the Company either directly or indirectly and which has
been authorized by the Board to participate in the Plan.m.
    
    Supplemental Compensation  means compensation payable to an Employee which is
in addition to an Employees salary and which the Committee, in its sole discretion,
may deem to be deferrable, either in whole or in part, under the terms and conditions
of the Plan.n.
    
    Termination  means termination of employment for any reason other than
Retirement including death, disability, resignation or release from employment with the
Company or a Subsidiary.o.
    
    Year or Plan Year  means the Companys fiscal year which ends on each
September 30 during which the Plan is in effect.
 2.
    
    Purpose of the PlanThe purpose of the Plan is to furnish a benefit to those Employees who contribute to the
success of the Company and to assist the Company in attracting and retaining such Employees.3.
    
    Establishment of the PlanThe Plan is established effective as of October 1, 1983.
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4.
    
    Administration of the PlanThe Committee shall manage and implement the provisions of the Plan. The Committee shall
have the authority to interpret the Plan, adopt and revise rules and regulations relating to
the Plan and make any other determinations which it believes necessary or advisable for the
administration of the Plan. Decisions and determinations by the Committee shall be final
and binding on Participants and other Employees except as otherwise provided in Paragraph
18.The Committee may delegate to such persons as they select any powers and duties with respect
to the Plan as the Committee shall deem appropriate.5.
    
    Designation of ParticipantsThe Committee or its delegate(s) shall designate Participants in the Plan in any Year from
among those Employees who may be eligible to receive a Bonus, Performance Award or
Supplemental Compensation during that Year on the following terms:
 a.
    
    The Committee or its delegate(s) shall notify those Employees whom it has
selected as Participants in the Plan no later than the end of the Year in which the
Bonus or Supplemental Compensation is earned or the end of the Performance Period with
respect to any Performance Award.b.
    
    The Committee may from Year to Year, at its discretion, change the eligibility
requirements for participation in the Plan.
 6.
    
    Requirements for Participation
 a.
    
    In order to participate in any Year, the Participant must complete and return
the Irrevocable Election Agreement no later than the dates set forth in Section 6(b)
and agree to defer a minimum of twenty-five percent (25%) of any Bonus, Performance
Award or Supplemental Compensation which the Company or Subsidiary would otherwise pay
to the Participant during such Year.
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b.
    
    If a Participant desires to defer any Bonus, Performance Award or Supplemental
Compensation, or the required portion thereof, the Irrevocable Election Agreement must
be completed and returned (i) before the end of the Year in which the Bonus or
Supplemental Compensation is earned, or (ii) before the end of the Performance
Period with respect to any Performance Award.c.
    
    At the time the Irrevocable Election Agreement is completed, the Participant
shall be required to specify the term of deferral and manner of payment in accordance
with the options provided in Section 8.d.
    
    Completion of the Irrevocable Election Agreement as to any Bonus, Performance
Award or Supplemental Compensation shall subject the amount deferred to all the terms
and conditions of the Plan.
 7.
    
    Deferred Compensation AccountThe Company shall establish a bookkeeping liability, an Account, for each Participant in the
Plan on the following terms:
 a.
    
    The Account shall serve solely as a device for determining the amount to be
paid to the Participant at the time specified for payment. The Account will not be
funded by the Company or the Subsidiary and it will not constitute or be treated as
funds set aside in trust or escrow and the Participant shall have no proprietary right
of any nature with respect to such Account.b.
    
    At such time as a Bonus, Performance Award or Supplemental Compensation would
otherwise be paid to a Participant, his Account shall be credited with an amount equal
to that portion of the Bonus, Performance Award or Supplemental Compensation which the
Participant had designated to be deferred and be subject to this Plan reduced by the
Employees portion of any Social Security taxes which are payable with respect to the
deferred amounts.
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c.
    
    As of September 30 in each Year, a Participants Account shall be credited with
interest at the prime rate of interest in effect on such September 30 at AmeriTrust
Company or its successor. Such interest shall be credited on the average daily balance
credited to the account during the twelve (12) month period ending on such September
30th.d.
    
    Amounts payable to a Participant or beneficiary pursuant to this Plan shall be
debited to his Account as of the date of payment. In the event a Participant or
beneficiary shall be entitled to receive the full amounts then credited to his Account,
he shall also be paid interest for the period from the preceding October 1 until the
date of payment. Such interest shall be computed at the prime rate of interest in
effect on the last day of the month next preceding the date of payment at AmeriTrust
Company or its successor. Payment of such interest shall be in lieu of interest for
such Year under paragraph c above.
 8.
    
    Payments of Deferred Compensation
 a.
    
    The Participant shall specify the end of the deferral term in his Irrevocable
Election Agreement which ending date may be:
 1.
    
    a specified date;2.
    
    the Participants Retirement;3.
    
    the attainment of a specified age by the Participant; or4.
    
    any combination of the foregoing.
 b.
    
    The Participant shall specify in the Irrevocable Election Agreement to have any
Years deferral, together with interest accrued thereon, paid in a lump sum or in a
specified number of approximately equal annual installments. Payment of the first
installment or the lump sum shall be made on or before the January 31st coinciding with
or next following the end of the deferral term.
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c.
    
    In the event of the Participants Termination, other than Termination upon
Retirement, or upon the Participants death after Retirement, and prior to the end of
the deferral term or before all installments have been paid with respect to any Years
deferral, the remaining balance as reflected on the Participants Account shall be paid
as follows:
 1.
    
    if, under the Participants Irrevocable Election Agreement, the
balance of the Account would have been payable within five (5) years of the
date of the
Participants Termination or death, then the Account shall be payable in
accordance with the Irrevocable Election Agreement; or2.
    
    if, under the Participants Irrevocable Election Agreement, the
balance of the Account would not have been payable within five (5) years of the
date of the Participants Termination or death, then the Account shall be
payable in five installments commencing on the January 31st next following the
Participants Termination or death and on the four (4) succeeding January
31st. Each installment shall equal the balance then credited to the Account
divided by the remaining number of unpaid installments.
 d.
    
    Payments shall be made to the Participant, or in the event of the Participants
death, to the beneficiary provided according to Section 10. If no beneficiary has been
designated, payment shall be made to the Participants spouse, if he or she survives
the Participant, or, if the Participant does not have a surviving spouse, payment shall
be made to the Participants estate.e.
    
    The Committee may in its sole discretion, accelerate the time and manner of
making payments from the Participants Account in the event of the Participants
Termination for any cause other than Retirement or upon the death of the Participant
after Retirement or an emergency or necessity involving hardship affecting the personal
or family affairs of any Participant or beneficiary of a deceased Participant.
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f.
    
    All payments made to a Participant, beneficiary of a deceased Participant or
the estate of the Participant pursuant to Section 8 shall be debited to the
Participants Account as of the date of payment.g.
    
    The Company shall have the right to withhold and pay over any and all
withholding taxes which it may be required to collect under federal, state or local law
with respect to payments hereunder.
 9.
    
    Additional DistributionIf Bonuses deferred under this Plan are not considered as pay in determining benefits under
the Keithley Instruments, Inc. Employees Pension Plan, as such Plan may be amended from
time to time hereafter, or the pension plan of a Subsidiary, then, if necessary, a
supplemental payment of equivalent actuarial value as determined by the Companys consulting
actuaries for the pension plan shall be made by the Company, or, if applicable, a
Subsidiary, with each payment (which will be in addition to the amounts payable under
Paragraph 8) to compensate a Participant for any reduction in benefits suffered under the
pension plan due to the deferral of a Bonus under this Plan.10.
    
    Designation of BeneficiaryEach Participant shall have the right to designate a beneficiary or beneficiaries to receive
any amount credited to his Account remaining unpaid at the Participants death. Such
designation shall be effected by filing written notification with the Committee and may be
changed from time to time by similar action. If the Participant fails to make such
designation, any such unpaid amount credited to his Account shall be paid to the
Participants surviving spouse, if any, or, if there is no surviving spouse, to the
Participants estate in the manner provided in Paragraph 8(c).11.
    
    Non-Alienation of PaymentsAny amount payable from a Participants Account shall not be subject in any manner to
alienation, sale, transfer, assignment, pledge, attachment, garnishment, or encumbrance of
any
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12.
    
    IncompetencyEvery person receiving or claiming payments under this Plan shall be conclusively presumed
to be mentally competent until the date on which the Committee receives a written notice, in
form and manner acceptable to the Committee, that such person is incompetent and that a
guardian, conservator, or other person legally vested with the care of the persons estate
has been appointed. In the event a guardian or conservator of the estate of any person
receiving or claiming payments under this Plan shall be appointed by a court of competent
jurisdiction, payments may be made to such guardian or conservator provided that proper
proof of appointment and continuing qualification is furnished in form and manner acceptable
to the Committee. Any such payment so made shall be a complete discharge of any liability
therefor.13.
    
    Right to Other BenefitsParticipation in this Plan shall not disqualify a Participant from the right to participate
in other benefits of the Company or a Subsidiary to which the Participant may be entitled.
However,
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14.
    
    No Right to Continued EmploymentIn no event shall participation in this Plan give or be deemed to give a Participant any
right to be retained in the employ of the Company.15.
    
    Amendment or Termination of the PlanThe Committee reserves the right to amend, modify or discontinue future deferrals under the
Plan at any time; provided, however, no such action shall:
 a.
    
    reduce the then amount credited to any Participants account;b.
    
    reduce the rate of interest to be credited until the date of payment to amounts
deferred prior to the date of such action;c.
    
    change the date of payment or the manner of payment of any amounts deferred
prior to the date of such action or the interest thereon; ord.
    
    provide for any forfeiture of any amounts deferred prior to the date of such
action or the interest thereon;
 
  a.
    
    the Company shall sell substantially all its assets, the purchaser of such
assets shall fail or refuse to assume the obligations of the Company and the Company
shall make liquidating distributions to its shareholders; orb.
    
    the Company shall institute proceedings to be adjudicated bankrupt, or shall
consent to the filing of a bankruptcy proceeding against it, or shall file a petition
or answer or
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consent seeking reorganization under the Bankruptcy Act or any similar
applicable federal or state law or shall make an assignment of its assets for the
benefit of creditors.
  16.
    
    Change of ControlIn the event a Change of Control of the Company has occurred or is about to occur, the
Company shall notify each Participant and each beneficiary of a deceased Participant, in
writing, that a Change of Control has occurred or is about to occur. Each Participant and
each beneficiary of a deceased Participant shall have the right, prior to the later of
thirty (30) days after the date of the Change of Control and thirty (30) days after receipt
of such notice, to elect to change the deferral
term, or the manner of payment of any amounts previously deferred under this Plan and may,
for example, elect to receive their full Account balance in an immediate lump sum payment.
For purposes of this Plan, a Change of 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 13(a)(9) or of Section 13(d)(3)
(as in effect on the date hereof) of the Securities Exchange Act of 1934, 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).
For purposes of this Plan, ownership of voting securities shall take into account and
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17.
    
    Books and RecordsThe books and records to be maintained for the purpose of the Plan shall be maintained by
the Company at its own expense and subject to the supervision and control of the Committee.
All expenses of administering the Plan shall be paid by the Company from its own funds.18.
    
    Review of Claims or DeterminationsAny Participant or beneficiary who desires to make a claim for a benefit under the Plan or
desires a determination with respect to any provision of the Plan, shall send such claim or
request in writing to the Compensation Committee, Keithley Instruments, Inc., 28775 Aurora
Rd., Cleveland, Ohio 44139.Any Participant or beneficiary who claims a benefit under the Plan which is wholly or
partially denied, or requests a determination with respect to any provision of the Plan,
shall be advised in writing of the denial or determination of the Committee and its reason
therefor. Upon receipt of a written request which is filed with the Committee within sixty
(60) days after the claim is denied or the determination is made, such Participant or
beneficiary will be afforded a full and fair review by the Committee of the claim denied or
the determination made. The result of such review by the Committee shall be delivered in
writing within sixty (60) days after the request for review is received and shall include
specific reasons for the decision.19.
    
    Governing LawThe Plan shall be construed, administered and governed in all respects under and by the laws
of the State of Ohio.
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DEFERRED COMPENSATION PLAN
 8th September
 WITNESSETH
    September 8
  c.
    
    As of September 30 in each Year, a Participants Account shall
be credited with interest. The rate of such interest shall equal the average
of the prime rates of interest for large money center banks as reported in the
Wall Street Journal for the last day of such September for which such rates are
reported and the last day
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of the December, March and June last preceding such
September and for which such rates are reported. Such interest shall be credited on the average
daily balance credited to the account during the twelve (12) month period
ending on such September 30th.d.
    
    Amounts payable to a Participant or beneficiary pursuant to
this Plan shall be debited to his Account as of the date of payment. In the
event a Participant or beneficiary shall be entitled to receive the full
amounts then credited to his Account, he shall also be paid interest for the
period from the preceding October 1 until the date of payment. The rate of
such interest shall equal the average of the prime rates of interest for large
money center banks as reported in the Wall Street Journal for the last day of
the December, March, June and September last preceding the date of payment and
for which such rates are reported. Payment of such interest shall be in lieu
of interest for such Year under paragraph c above.
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