Keithley 7169 Manuale utente

Model 7169 General PurposeScannerCard

Instruction Manual

Contains Operating and Servicing Information

WARRANTY

LIMITATION OF WARRANTY

STATEMENT OF CALIBRATION

Model 7169

General Purpose Scanner Card

Instruction Manual

01989, Keithley Instruments, Inc.

Cteveland, Ohio, U.S.A.

First Printing, July 1989

Document Number: 716Y-901.01 Rev. A

All Keithley product names are trademarks or registered trade,

marks of Keithley Instruments, Inc.

Other brand and product names are trademarks or registered

trademarks of their respective holders.

SAFETY PRECAUTIONS

The following safety precautions should be observed before using the

Model 7169 and the associated instruments.

This card is intended for use by qualified personnel who recognize

shock hazards and are familiar with the safety precautions required to

avoid possible injury. Read over this manual carefully before using the

card.

Exercise extreme caution when a shock hazard is present at the test cir-

cuit. User-supplied lethal voltages may be present 011the PC board. The

American National Standards Institute (ANSI) states that a shock haz-

ard exists when voltage levels greater than 30V RMS or 42.4V peak are

present. A good safety practice is to expect that hazardous voltage is

present in any unknown circuit before measuring.

Do not exceed500V peak between any two pins or between any pin and

earth ground.

Inspect the connecting cables and test leads for possible wear, cracks, or

breaks before each use.

For maximum safety, do not touch the test cables or any instruments

while power is applied to the circuit under test. Turn off the power and

discharge any capacitors before connecting or disconnecting cables

from the card.

Do not touch any object which could provide a current path to the com-

mon 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 card, as defined in the

specifications and operation section of this manual.

Model 7169 20 Form C Switch Card

CHANNELS PER CARD: 2.0independent Form C. All poles available

at connectors. Replacement of factory installed jumper allows

current limit resistor in series with common of each channel. On-

card bus allows for addition of jumper to change configuration from

switch to multiplex. Bus also allows channel interconnection.

CONNECTOR TYPE: 3 x 20 pin mass termination.

RELAY DRIVE CURRENT: 3OmA per relay typical.

MAXIMUM SIGNAL LEVEL: 500V peak, 0.5A rms switched, 1A rms

carry, 1OW (resistive load only).

CONTACT LIFE: >108 closures cold switching; >107 closures at

maximum signal levels.

CONTACT RESISTANCE: <2Q to rated life.

CONTACT POTENTIAL: <3OkV, C to NO or NC.

ACTUATION TIME: <lmsec., exclusive of mainframe.

CHANNEL ISOLATION: >109Q, <150pF.

INPUT ISOLATION: >lOgQ <150pF.

COMMON MODE VOLTAGE: 500V peak.

OPERATING ENVIRONMENT: 0” to 55”C, up to 35°C at 70% RH.

STORAGE ENVIRONMENT: -25’ to 65°C.

DIMENSIONS, WEIGHT: 32mm high x 114mm wide x 272mm long

(1.25 in. x 4.5 in. x 10.75 in.). Net weight 0.54 kg (19 oz.).

Specifications subject to change without notice.

Table of Contents

SECTION 1 - General Information

1.1 INTRODUCTION

1.2 WARRANTYINFORMATION

1.3 MANUAL ADDENDA

1.4 SAFETY SYMBOLS AND TERMS

1.5 SPECIFICATIONS

1.6 UNPACKING AND INSPECTION

1.6.1 Inspection for Damage

1.6.2 shipping Contents

1.6.3 Instruction Manual

1.7 REPACKING FOR SHIPMENT

1.8 OM’IONALACCESSOIXES

SECTION 2 - Operation

l-l

1-l

l-2

l-3

2.1 INTRODUCTION ......................... 2-l

2.2 HANDLING PRECAUTIONS ................ 2-l

2.3 EQUIVALENT CIRCUIT .................... 2-2

2.4 MLKTI-CARD CONFIGURATIONS ........... 2-2

2.5 CONNECTIONS _.., _, ., _.., ..__ __ 2-6

2.5.1 Connections Using Model 7169~KIT 2-6

2.5.2 Connections Using Model 7169-MTC Cable 2-10

25.3 Shielded Cables 2-12

2.6 CARDINSTALLATIONANDREMOVAL 2-12

2.6.1 Scanner Card Installation 2-12

2.6.2 Scanner Card Removal 2-14

2.7 MAINFRAME CONTROL OF SCANNER CARD 2-14

2.7.1 Matrix Mode 2-14

2.7.2 Multi-Channel Svstems 2-18

2.7.3 Scanner Switch&g Control 2-18

2.7.4 ReactiveLoads ,__._.__..,,__,,....._.. 2-19

SECTION 3 - Applications

3.1 INTRODUCTION 3-l

3.2 COUPON TESTING 3-l

3.3 CABLING INSULATION TESTING 3-2

SECTION 4 - Service Information

4.1 INTRODUCTION 4-l

4.2 HANDLING AND CLEANING PRECAUTIONS 4-l

4.3 PERFORMANCE ~RIFICATION 4-2

4.3.1 Environmental Conditions 4-2

4.3.2 Recommended Equipment 4-2

4.3.3 Connector Preparation 4-2

4.3.4 Channel Isolation Tests 4-3

4.3.5 Input Isolation Tests 4-8

4.3.6 Path Resistance Tests 4-10

SECTION 5 - Replaceable Parts

5.1 INTRODUCTION .......................

5.2 PARTSLISTS ..........................

5.3 ORDERING INFORMATION ..............

5.4 FACTORY SERVICE .....................

5.5 COMPONENT LAYOUT AND SCHEMATIC

DIAGRAM ............................

5-l

5-1

5-l

5-2

List of Illustrations

SECTION 2 - Operation

Figure 2-I

Figure 2-2

Figure 2-3

Figure 2-4

Figure 2-5

Figure 2-6

Figure 2-7

Figure 2-8

Figure 2-9

Figure 2-10

Model 7169 Simplified Schematic

Multi-Card Configuration

Separate Outputs Configuration

Connectors on Scanner Card

(Pin Side Shown)

Female Connector Pin Identification

(Terminal Crimp Side Shown)

Model 7169-MTC-10

Card Installation in Model 705

Card Installation in Model 706

Limiting Capacitive Reaction Current

Limiting Inductive Reaction Voltage

SECTION 3 -Applications

Figure 3-l Coupon Insulation Resistance Testing 3-2

Figure 3-2 Cabling Insulation Testing 3-3

SECTION 4 - Service Information

Figure 4-1

Figure 4-2

Figure 4-3

Channel Isolation ...............

Input Isolation ............ ....

Path Resistance .................

2-2

2-4

2-5

2-6

2-7

2-10

2-13

2-14

2-19

2-21

4-5

4-9

4-11

List of Tables

SECTION 2 - Operation

Table 2-l

Table 2-2

Table 2-3

Table 2-4

Connector Pin Identification 2-8

Model 7169-MTC Conductor Identification 2-11

Scanner Control of Model 7169 Matrix

Mode (O-Pole) 2-16

Model 705 Channel Assignments in O-Pole

Mode . . . . . . . . . . . . ..t............. 2-18

SECTION 4 - Service Information

Table 4-l Verification Equipment 4-3

Table 4-2 Connector Pin Identification 4-6

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