Keithley 2750 Service Manual

4-16 Troubleshooting Model 2750 Multimeter/Switch System Service Manual
Analog signal switching states
Table 4-5 through Table 4-13 provide switching states of the various relays, FETs, and
analog switches for the basic measurement functions and ranges. These tables can be used
to assist in tracing an analog signal from the input to the A/D multiplexer.
Tab le 4- 5
DCV signal switching
Range Q101 Q102 Q151 Q150 Q114 Q136 Q109
100mV
1V
10V
100V
1000V
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
Range K101* Q113 Q104 Q108 Q106 Q148
100mV
1V
10V
100V
1000V
SET
SET
SET
SET
SET
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
*K101 set states: Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
K101 reset states: Pin 8 switched to Pin 9
Pin 3 switched to Pin 2

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