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Instruction Manual




Model 7014
3%Channel Thermocouple/
General Purpose Multiplexer Card




Contains Operating and Servicing information
WARRANTY




Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year
from date of shipment.


Kcithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable
batteries, diskettes, and documentation.


During the warranty period, WCwill, at our option, either repair or replace any product that proves to be defect&


To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio.
You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service
facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for
the balance of the original warranty period, or at least 90 days.


LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley's express written consent, or
misuse of any product or part, This warranty also does not apply to fuses, software, non-rechargcahle batteries, damage from
battery leakage, or problems arising from normal wear or failure to follow instructions.


THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO-
VIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.


NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS
INSTRUMENTS AND SOFTWARE EVEN IF KFITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE
OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIM-
ITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSON, OR DAMAGE TO PROPERTY.
Model 7014 Instruction Manual




01992, Keithley Instruments, Inc.
All Rights Reserved
Cleveland, Ohio, U. S. A.
Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The
Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are
released between Revisions, contain important change information that the user should incorporate immediately
into the manual. Addenda are numbered sequentially. When a new Revision is created, all Addenda associated
with tlw previous Revision of the manual are incorporated into the new Revision of the manual. Each new Revi-
sion includes a revised copy of this print history page.


revision A (Document Number 70~901.01) ............................................................................
October 1992
Revision B (Document Number 7014.901-01).........................................................................
November 1992
Safety Precautions

The following safety precautions should be observed bcforc using Users of this product must bc protected from electric shock at all
this product and any associated instrumentation. Although some in- times. The rcsponsiblc body must ensure that users are prevented
stmmcnt~ and accessories would nomxally bc used with non-haz- access and/or insulated from every connection point. In some c.xses.
ardous voltages, there are situations where hazardous conditions connections must bc exposed to potendal human contact. Product
may be presem. users in these circumstances must bc trained to protect thcn~scl~es
from the risk of electric shock. If the circuit is capable of operating
This producl is intended for use by qualified personnel who recog- at or above 1000 volts, no conductive part of the circuit may be
nize shock hazards and are familiar with the safely precautions rc- exposed.
quired to avoid possible injury. Read the operating information
arcfully before using the product. As described in the lntemetional Elcctrmcchnical Commission
(IEC) Standard IEC 664, digital muldmeter measuring circuits
The types of product users are: (e.g.. Kcithley Models 175A, 199. 2000. 2001. 2002. and 2010) arc
Responsible body is the individual or group responsible for the USC lnstallatiou Category II. All other instruments signal terminals are
and maintenance of cquipmcnt. for ensuring that the equipment is Installation Category I and must not bc connected to mains.
operated within its spccitications and operating limits, and for en-
suring that operators are adequately trained. Do not connect switching cards directly to unlimited power circuits.
`hey arc intended to be used with impcdancc limiled sources.
Operators use the product for its intended function. They mull be NEVER connect switching cards directly to AC mains. When con-
trained in electrical safety procedures and proper use of the instru- necting sources to switching cards. install protective devices to iim
ment. They must be protected from electric shock and contact with it fault current and voltage to the card
hazardous live circuits.
Before operating an inwument, make sure the lint cord is connects
Maintenance personnel pafonn routine procedures on the product ed to B properly grounded power receptacle. lnspcct the connecting
to keep it operating, for example, setting the line voltage or replac- cables. test leads, and jumpers for possible wear, cracks. or brwks
ing consumable materials. Maintenance procedures are described in before each use.
the manual. The procedures explicitly state if the operator may pcr-
form them. Otherwise, they should be performed only by service For maximum safety, do not touch the product. test cables, or .vly
pxs0""e1. other inatrumcnrs while power is applied to the circuit under test.
ALWAYS remove power from the entire test system and discharge
Service personnel are trained to work on live circuits, and perform any capacitors before: connecting or dirconnecdng cables or jumpy
safe installations and repairs of pmducts. Only properly trained ser- em, instdting Or removing switching cards, or making internal
vice personnel may perform installation and sen%x procedures. changes, such as installing or removing jumpers.

Exercise extreme caution when a shock hazard is present. Lethal Do not touch any object that could provide a current path to the
voltage may be present on cable connector jacks or test fixtures. The common side of the circuit under test or power line (earth) ground.
American National Sandards Institute (ANSI) states that B shock Always make ,,,~a~"rcm~"ts with dry hands while standing on a
hazard exists when voltage levels greater than 30V RMS, 42.4V dry, insulaled surface capable of withstanding the voltage being
peak, or 60VDC are present. A good safety practice is to expect measured.
that hazardous voltage is present in any unknown circuit before
measuring.
The instrument and accessories must be used in accordance with its The WARNING heading in a manual explains dangers that might
specifications and operating instructions or the safety of the cquip- result in personal injury or death. Always read the associated infor-
ment may be impaired. mation very canfully before performing the indicated procedure.

Do not exceed the maximum signal levels of the instruments and ac- The CAUTION heading in a manual explains hazards that could
cessories, as defined in the specifications and operating informa- damage the instrument. Such damage may invalidate the warranty.
tion, and as shown on the instrument or test fixture panels, or
switching card. Instrumentation and accessarics shall not be connected to humans.

When fuses are used in a product, replace with fame type and rating Before performing any maintenance, disconnect the line cord and
for continued protection against fire hazard. all test cables.
To maintain protection from electric shock and tire, replacement
Chassis connections must only be used as shield connections for
components in mains circuits, including the power transformer, test
measuring circuits, NOT as safety earth ground connections.
leads, and input jacks, must be purchased from Keirhley hutn-
menrs. Standard fuses, with applicable national safety approvals,
If you are using a test fixture, keep the lid closed while power is ap-
may be used if the rating and type are the same. Other components
plied to the device under test. Safe operation requires the use of a
that are not safety related may be purchased from other suppliers as
lid interlock.
long as they arc equivalent to the original component. (Note that se-
lected parts should be purchased only through Keithley lnstmments
[email protected] screw is present, connect it to safety earth ground using the
to maintain accuracy and functionality of the product.) If you are
wire recommended in the user documentation.
unsure about the applicability of a replacement component, call a
Keithley Instruments office for information.
Then. symbol on an instrument indicates that the user should re-
ker to the operating instructions located in tbc manual.
To clean an instrument, USCa damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply
men symbol on an instrument shows that it am source ormea-
cleaner directly to the instmmcnt or allow liquids to enter or spill
sure 1000 volts or more, including tbc combined effect of normal
on the instrument. Products that consist of a circuit board with no
and common mode voltages. Use standard safety precautions to
case or chassis (c.g., data acquisition board for installation into a
avoid personal contact with thcsc voltages.
computer) should never require cleaning if handled according to in-
structions. If the board becomes contaminated and opertiion is af-
fected, the board should bc returned to the factory for proper
clcaning/scrvicing.




Rev. IO/99
Model 7014
39 Channel Thermocouple/General Purpose Multiplexer




10.7'C ((PC to 18