Keithley 2750 Service Manual

List of Illustrations
1 Performance Verification
Figure 1-1 Connections for Model 2750 DC volts verification .............. 1-9
Figure 1-2 Connections for Model 2750 AC volts verification ............ 1-10
Figure 1-3 Connections for Model 2750 DC current verification ......... 1-12
Figure 1-4 Connections for Model 2750 AC current verification ......... 1-13
Figure 1-5 Connections for Model 2750 resistance verification
(1 to 10M ranges) .......................................................... 1-14
Figure 1-6 Connections for Model 2750 resistance verification
(100M range) .................................................................... 1-15
Figure 1-7 Connections for Model 2750 dry circuit resistance
verification ........................................................................... 1-17
Figure 1-8 Connections for Model 2750 frequency verification ........... 1-20
Figure 1-9 Connections for Model 7700 DC volts verification ............ 1-21
Figure 1-10 Connections for Model 7700 AC volts verification ............ 1-22
Figure 1-11 Connections for Model 7700 DC current verification ......... 1-24
Figure 1-12 Connections for Model 7700 AC current verification ......... 1-25
Figure 1-13 Connections for Model 7700 resistance verification
(1 to 10M ranges) .......................................................... 1-27
Figure 1-14 Connections for Model 7700 resistance verification
(100M range) 1-27
Figure 1-15 Connections for Model 7700 dry circuit resistance verification 1-29
Figure 1-16 Connections for Model 7700 thermocouple
temperature verification ....................................................... 1-31
Figure 1-17 Connections for Model 7700 frequency verification ........... 1-34
Figure 1-18 Connections for Model 7700 ratio and average verification 1-35
2 Calibration
Figure 2-1 Low-thermal short connections ............................................. 2-7
Figure 2-2 Connections for DC volts and ohms calibration .................... 2-8
Figure 2-3 Connections for DC and AC amps calibration .................... 2-11
Figure 2-4 Connections for AC volts calibration .................................. 2-12
Figure 2-5 Function generator connections for manufacturing calibration2-22
3 Routine Maintenance
Figure 3-1 Power module ........................................................................ 3-3
Figure 3-2 AMPS fuse ............................................................................. 3-4
Figure 3-3 Model 7700 amps fuses ......................................................... 3-5
Figure 3-4 Rack preparation .................................................................. 3-11
4 Troubleshooting
Figure 4-1 Power supply block diagram ................................................. 4-4

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