Keithley 2750 Service Manual

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

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A