Keithley 7037, Инструкция по эксплуатации

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6 Service Information
Introduction......................................................................................................................................................... 6-1
Handling and cleaning precautions ..................................................................................................................... 6-1
Performance verification..................................................................................................................................... 6-2
Environmental conditions ........................................................................................................................... 6-2
Recommended equipment........................................................................................................................... 6-2
Card connections......................................................................................................................................... 6-2
Channel resistance tests .............................................................................................................................. 6-3
Offset current tests ...................................................................................................................................... 6-4
Contact potential tests ................................................................................................................................. 6-5
Channel to channel isolation tests............................................................................................................... 6-5
Common-mode isolation tests..................................................................................................................... 6-8
Channel functionality test ................................................................................................................................... 6-9
Special handling of static-sensitive devices........................................................................................................ 6-9
Principles of operation ...................................................................................................................................... 6-10
Block diagram ........................................................................................................................................... 6-10
ID data circuits .......................................................................................................................................... 6-11
Relay control ............................................................................................................................................. 6-12
Relay power control .................................................................................................................................. 6-12
Digital I/O output channel control ............................................................................................................ 6-12
Digital I/O input channel control .............................................................................................................. 6-12
Power-on safeguard................................................................................................................................... 6-12
Troubleshooting ................................................................................................................................................ 6-13
Troubleshooting equipment ...................................................................................................................... 6-13
Troubleshooting access ............................................................................................................................. 6-13
Troubleshooting procedure ....................................................................................................................... 6-14
7 Replaceable Parts
Introduction......................................................................................................................................................... 7-1
Parts lists ..............................................................................................................................................................7-1
Ordering information .......................................................................................................................................... 7-1
Factory service .................................................................................................................................................... 7-1
Component layouts and schematic diagrams ...................................................................................................... 7-1
Index
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