Keithley 7011-S Instruction Manual page 9

4.1 Introduction.. ....................................................................................................................................................
4-1
4.2
Power limits.. ....................................................................................................................................................
4-1
4.3
Mainframe control of multiplexer card.. ...................................................................................................... 4-l
4.3.1
Channel assignments ..............................................................................................................................
42
4.3.2
Front panel control. .................................................................................................................................
4-4
4.3.3
IEEE-488 bus operation.. .........................................................................................................................
44
4.4
Multiplexer switching examples ...................................................................................................................
4-5
4.4.1
Resistor testing .........................................................................................................................................
45
4.4.2
Transistor testing .....................................................................................................................................
49
4.4.3
Testing with matrix cards.. ...................................................................................................................
4-11
4.5
Measurement considerations .......................................................................................................................
4-15
4.5.1
Path isolation.. ........................................................................................................................................
415
4.52
Magnetic fields .......................................................................................................................................
4-16
4.5.3
Radio frequency interference.. ............................................................................................................. 4-16
4.5.4
Ground loops .........................................................................................................................................
4-17
4.5.5
Keeping connectors clean .....................................................................................................................
4-17
4.5.6 AC frequency
response.. .......................................................................................................................
4-17
5.1
5.2
5.3
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.6
5.6.1
5.6.2
5.6.3
Introduction ......................................................................................................................................................
5-l
Handling and cleaning precautions.. ............................................................................................................ 5-l
Performance verification
...............................................................................................................................
5-2
Environmental conditions ......................................................................................................................
5-2
Recommended equipment .....................................................................................................................
5-2
Multiplexer card connections ................................................................................................................
5-3
Channel resistance tests ..........................................................................................................................
5-3
Offset current tests ...................................................................................................................................
5-5
Contact potential tests .............................................................................................................................
5-7
Bank and channel-to-channel isolation tests ....................................................................................... 5-8
Differential and common-mode isolation tests.. ............................................................................... 5-12
Special handling of static-sensitive devices.. .................................................................. .: ......................... 5-14
Principles of operation ..................................................................................................................................
5-15
Block diagram ........................................................................................................................................
5-15
ID data circuits.. .....................................................................................................................................
5-15
Relay control ...........................................................................................................................................
5-17
Relay power control ..............................................................................................................................
5-17
Power-on safeguard ..............................................................................................................................
5-17
Troubleshooting .............................................................................................................................................
5-17
Troubleshooting equipment ................................................................................................................. 5-17
Troubleshooting access .........................................................................................................................
5-18
Troubleshooting Procedure .................................................................................................................. 5-18
6.1 Introduction ......................................................................................................................................................
6-l
6.2
Parts lists ...........................................................................................................................................................
6-l
6.3
Ordering
information..
....................................................................................................................................
6-1
6.4
Factory service.. ................................................................................................................................................
6-l
6.5
Component layouts and schematic diagrams.. ........................................................................................... 6-2