Keithley 7054 Service manual
Model 7054 High Voltage
Scanner Card
Instruction Manual
Contains Operating and Servicing Information
WARRANTY
Keithky Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 3 years fmm
date of shipment.
Keithky Inshuments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative. or contact Keitbley 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 pmduct retomed, transportation prepaid. Repaired or replaced products are warranted for the balance
of the orighd 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. Tbis warranty also does not apply to fuses, software. non-rechargeable batteries, damage from battery leakage., or problems arising from normal wear or failurc to follow instructions.
THISWARRANTYISINLJELJOFALLOTHEXW-,
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE THE REMEDIES PROVIDED HEREIN
ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
m KEZTHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONS!ZQJENTlAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVBN IF
POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED To:
COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINEZI AS THE RESULT OF INJURY TO ANY PERSON, OR
DAMAGE TO PROPERTY.
KFJTHLBY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE
EXPRJZXED OR IMPLIED, INCLUDING ANY IMPLIED
Model 7054 High Voltage Scannr Card
Instruction Manual
Q 1987, Keithley Instruments, Inc.
Test Instrumentation Group
All rights reserved.
Cleveland, Ohio, U.S.A.
February 1987, Third Printing
Document Number: 7054-901-01 Rec. C
SAFETY PRECAUTIONS
The following safety precautions should be observed before using this
product and any associated instrumentation. Although some instruments
and accessories would normally be used with non-hazardous voltages,
there are situations where hazardous conditions may be present.
This product is intended for use by qualified personnel who recognize
shock hazards and are familiar with the safety precautions required to
avoid possible injury. Read the operating information carefully before using the product.
Exercise extreme caution when a shock hazard is present. Lethal voltage
may be present on cable connector jacks or test fixtures. The American
National Standards Institute (ANSI) states that a shock hazard exists
when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are
present. A good safety practice is to expect that hazardous voltage is
present in any unknown circuit before measuring.
Before operating an instrument, make sure the line cord is connected to a
properly grounded power receptacle. Inspect the connecting cables, test
leads, and jumpers for possible wear, cracks, or breaks before each use.
For maximum safety, do not touch the product, test cables, or any other
instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or
removing switching cards, or making internal changes, such as installing
or removing jumpers.
Do not touch any object that could provide a current path to the common
side of the circuit under test or power line (earth) ground. Always make
measurements with dry hands while standing on a dry, insulated surface
capable of withstanding the voltage being measured.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as
shown on the instrument or test fixture rear panel, or switching card.
Do not connect switching cards directly to unlimited power circuits. They
are intended to be used with impedance limited sources. NEVER connect
switching cards directly to AC main. When connecting sources to switching cards, install protective devices to limit fault current and voltage to
the card.
When fuses are used in a product, replace with same type and rating for
continued protection against fire hazard.
Chassis connections must only be used as shield connections for measur-
ing circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied
to the device under test. Safe operation requires the use of a Bd interlock.
If a @ screw is present on the test fixture, connect it to safety earth
ground using #18 AWG or Iarger wire.
The t symbol on an instrument or accessory indicates that IOOOV or
more may be present on the terminals. Refer to the product manual for de-
tailed operating information.
Instrumentation and accessories should not be connected to humans,
Maintenance should be performed by qualified service personnel. Before
performing any maintenance, disconnect the line cord and all test cables.
SPECIFICATIONS
MODEL 7054 HIGH VOLTAGE SCANNER CARD
CHANNELS PER CARD: 10.
CONTACT CONFIGURATION: l-pole Form A, common guard connection.
CONNECTOR TYPE: Quick disconnect screw terminal, No. 18 AWG maximum
wire size.
RELAY DRIVE CURRENT: 50mA (per relay).
MAXIMUM SIGNAL LEVEL: lOOOV, 0.5A, 1OVA peak (resistive load).
CONTACT LIFE: 10” closures (cold switching); 10 6 closures (at maximum signal
level).
CONTACT RESISTANCE: c 1l-l.
ACTUATION TIME: <2Oms, exclusive of mainframe.
CHANNEL ISOLATION: > 10’9 and c 10pF.
INPUT ISOLATION: > 109R and < 150pF.
GUARD TO CHASSIS VOLTAGE: 200V maximum.
ENVIRONMENT:
Operating: 0” to SOT, up to 35°C at 70% non-condensing relative humidity.
Storage: -25” to t7O”C.
DIMENSIONS, WEIGHT: 32mm high x l&run wide x 272mm long (l*/(” x 44’2”
x 10%“). Net weight 0.28kg (10 oz.).
Specifications subject to change without notice.
TABLE OF CONTENTS
SEcmON i-
1.1
1.2
1.3
1.4
1.5
1.6
SECTION 2 - OPERATION
2.1
2.2
2.3
2.4
2.5
2.6
2.7
SECTION 3 - SERVICING INFORMATION
3.1
3.2
3.3
3.4
3.5
3.5.1
3.5.2
Introduction.
Warranty Information
Manual Addenda
Safety Symbols and Terms
Unpacking and Inspection.
Specifications
Zntroduction..............................~
Safety Precautions
Wiring.
Installation and Removal
Operating Considerations
Applications.
Switch Terminology
Introduction
Handling and Cleaning
Recommended Test Equipment.
Contact Resistance Test
Isolation Tests
GENERAL INFORMATION
.........................................
..................................... 2
........................................
....................................
..............................................
........................................
..................................
.........................................
.......................................
Channel isolation
Input Isolation,
..................................
.................................... 19
.................................
............................
............................ 2
..............................
.............................
..............................
....................... 16
............................... 16
...........
1
1
2
3
5
5
5
6
6
11
13
l5
15
‘18
18
SECTION 4 -
Introduction
ii
4.3
4.4
4.5
Replaceable Parts..
Ordering Information
Factory Service
Component Layout and Schematic Diagram.
REPLACEABLE PARTS
.........................................
..................................
................................
......................................
...........
21
22
22
22
22
LIST OF TABLES
SECTION 3 -
3-1
SECTION 4 -
4-1
Recommended Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . 16
Model 7054 Replaceable Parts . , . . . . . . . . , . . . . . . . . . . . . . . 21
SERVICING INFORMATION
REPLACEABLEPARTS
LIST OF ILLUSTRATIONS
SECTION 2 - OPERATION
2-1
2-2
2-3
2-4
SECTION 3 -
3-l
3-2
3-3
Limiting Ca
Limiting In
Measuring 3-Phase Voltages
Switch Terminology
Contact Resistance
Channel Isolation
Input Isolation
acitive
cp
uctive Reaction Voltage.
SERVICING INFORMATION
.................................... 19
......................................
Reaction Current
..........................
..................................
...................................
...................
...................
9
10
12
13
17
20
SECTION 4 -
4-1
4-2
ii
Model 7054 Component Layout . . . . . . . . . . . . . . . . . . . . . . . 23
Model 7054 Schematic Diagram . . . . . . . . . , . . . . . . . . . . . . . 25
REPLACEABLE PARTS
SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
The Model 7054 is a high voltage scanner card that switches signal levels
up to lOOOV, 0.5A or 1OVA peak (lOmA at 1OOOV) for resistive loads only.
Each of the 10 channels on the card conSists of a single-pole, Form A
(normally open) relay with a common guard connection and a fused
input. The output connection and the input connections have quick
disconnect screw terminals with a maximum allowable wire size of No.
18 AWG.
Single-pole switching is done in less than 20msec exclusive of the main-
frame, and the specified contact life is 10B closures with cold switching
and lo6 closures at maximum signal levels. Contact resistance is less
than 10. The relay drive current is 50mAlrelay.
The Model 7054 is field installable in an appropriate Keithley scanner
mainframe (e.g. Model 705 or Model 706). With the isolation between
each channel being greater than 1O”Q and less than lOpF, each channel is well insulated from cross channel noise and interference.
1.2 WARRANTY INFORMATION
Warranty information is stated on the inside front cover of this manual.
If there is a need for service, contact the Keithley representative or
authorized repair facility in your area. Check the back cover for addresses. The service form supplied at the end of the manual should
be used to provide the service facility with information concerning any
difficulty.
1.3 MANUAL ADDENDA
Product improvements or changes to this manual will be explained on
an addendum included with the manual. It is recommended that this
information be incorporated immediately into the appropriate places
in the manual.
If an additional instruction manual is required, order the manual
package (Keithley Part Number 7054-901-00). The manual package includes an instruction manual and all pertinent addenda.
1.4 SAFETY SYMBOLS AND TERMS
The symbol !
operating instructions.
The symbol
terminals.
The WARNING used in this manual explains dangers that could result
in personal injury or death.
The CAUTION used in this manual explains hazards that could damage
the instrument.
A on the card denotes that the user should refer to the
denotes that a high voltage may be present on the
AIM
1.5 UNPACKING AND INSPECTION
The Model 7054 was inspected both electrically and mechanically before
shipment. Upon receiving the Model 7054, unpack all items from the
shipping carton and check for any obvious damage that may have occurred during transit. Report any damage to the shipping agent. Retain and use the original packaging materials in case reshipment is
necessary. The following items are shipped with every Model 7054:
Model 7054 High Voltage Scanner Card
Model 7054 Instruction Manual
Loading...