Keithley 2750 - Table 4-17 2 Signal Multiplexing and Gain; Table 4-18 4 Signal Multiplexing and Gain; Table 4-19 4 Dry Circuit Signal Multiplexing and Gain

Model 2750 Multimeter/Switch System Service Manual Troubleshooting 4-23
Troubleshooting
Tab le 4- 17
2 signal multiplexing and gain
Range
Signal
(U163)
U129
Pin 1
U129
Pin 8
U129
Pin 9
Gain
(U166)
10
100
1k
10k
100k
1M
10M
100M
S4
S4
S4
S4
S4
S4
S4
S4
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
100
100
10
10
10
1
1
1
Tab le 4- 18
4 signal multiplexing and gain
Range
Signal
(U163)
U129
Pin 1
U129
Pin 8
U129
Pin 9
Gain
(U166)
1
10
100
1k
10k
100k
1M
10M
100M
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
100
100
100
10
10
10
1
1
1
Tab le 4- 19
4 dry circuit signal multiplexing and gain
Range
Signal
(U163)
U129
Pin 1
U129
Pin 8
U129
Pin 9
Gain
(U166)
1
10
100
1k
S4 then S7
S4 then S7
S4 then S7
S4 then S7
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
100
100
100
100