Agilent Technologies E1343A Manuale di Servizio Pagina 59
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Making Visual
Checks
Visual checks for the multiplexer assemblies include the following.
See Table 4-3 for typical symptoms/actions.
• Check switches/jumpers
• Check for heat damage
• Check terminal module connections
NOTE Refer to the appropriate user’s manual for information on logical address
and IRQ settings. If there are no apparent problems following the visual
checks, run the Performance Verification Tests in Chapter 2 to see if a relay
or other component is defective.
Table 4-3. E1343A/44A/45A/47A/55A/56A Visual Tests/Checks
Test/Check Reference
Designator
Check Action/Notes
Heat Damage - - - - -
- - - - -
- - - - -
Discolored PC boards
Damaged insulation
Evidence of arcing
If there is damage, do not operate the
multiplexer until you have corrected the
problem.
Switch/Jumper
Settings
- - - - -
SW1
SW2
IRQ Level setting
Logical address setting
Card ID setting
Factory set at 1
Factory set at 112
Set to 45A,47A,55A, or 56A as
appropriate for multiplexer
Component
Assembly
F1, F2
J1
P1
Fuse continuity
Dirty or bent connector pins
Dirty or bent connector pins
Check fuses with ohmmeter
Straighten/clean pins
Straighten/clean pins
Terminal
Module
P1
TB1 - TB5
J0, J1
(E1355A/56A)
Dirty or bent connector pins
Loose screw connections
Bridge connections
Straighten/clean pins
Check/tighten connections
Set for 1/4, 1/2, or full as required
Chapter 4 Service 57
- E1355A and E1356A 1
- Relay Multiplexers 1
- Contents 3
- WARNINGS 6
- Documentation History 6
- Safety Symbols 6
- Declaration of Conformity 7
- What’s in This Manual 11
- General Information 13
- Safety Considerations 14
- Relay Life 16
- Multiplexer Descriptions 17
- Recommended Test Equipment 19
- Inspection/Shipping 19
- Verification Tests 23
- Functional Verification Test 24
- Operation Verification Test 24
- Wiring the Test 25
- Measuring Protection 26
- Resistors 26
- Chs 00 - 07 and 90 27
- Ch 00 - 07 and 90 27
- LO Measurements 27
- Ch 00 - 07 and 90 28
- GU Measurements 28
- Ch 08 - 15 and 91 - 92 29
- HI Measurements 29
- Example: Closed 31
- Channel Resistance 31
- Continued on Next Page 32
- Test 2-2: DC Isolation Test 35
- HI to LO Isolation 36
- HI to GU Isolation 37
- Example: DC Isolation 37
- (0.005 ⋅ 1.2×10 39
- Replaceable Parts 43
- (cont’d) 45
- Reference Designators 47
- Parts Locators 48
- Chapter 4 51
- Introduction 51
- E1343A/44A 52
- Multiplexer 52
- Descriptions 52
- E1345A/47A 53
- 52 Service Chapter 4 54
- E1355A/56A Strain 55
- Gage Multiplexer 55
- 54 Service Chapter 4 56
- Terminal Module 57
- Description 57
- Chapter 4 Service 55 57
- Troubleshooting Techniques 58
- (E1355A/56A) 59
- Testing the 60
- Soldering Printed 61
- Circuit Boards 61
- Post-Repair Safety 61
- 60 Service Chapter 4 62
- Chapter 4 Service 61 63
- 62 Service Chapter 4 64
- Appendix A 65
- Performance 66
- Verification 66
- Example: DC 70
- Isolation Test 70
- Backdating Information 73
- *E1345-90013* 84
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