Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual Performance Verification 1-11
2750 Verification
4. Source 1kHz and 50kHz AC voltages for each of the ranges summarized in
Table 1-3, and make sure the respective Model 2750 readings fall within stated
limits.
Verifying DC current
Check DC current accuracy by applying accurate DC currents from the DC current cali-
brator to the AMPS input of the Model 2750 and verify that the displayed readings fall
within specified limits.
Follow these steps to verify DC current accuracy:
1. Connect the Model 2750 AMPS and INPUT LO jacks to the calibrator as shown in
Figure 1-3. Be sure the INPUTS switch is in the FRONT position.
2. Select the DC current measurement function by pressing the DCI key.
Tab le 1- 3
ACV reading limits
ACV
Range
Applied AC
Vo l t a g e
1kHz Reading Limits
(1 year, 18°C to 28°C)
50kHz Reading Limits
(1 year, 18°C to 28°C)
100mV
1V
10V
100V
750V
100.0000mV
1.000000V
10.00000V
100.0000V
700.000V*
99.910 to 100.090mV
0.99910 to 1.00090V
9.9910 to 10.0090V
99.910 to 100.090V
699.36 to 700.64V
99.830 to 100.170mV
0.99830 to 1.00170V
9.98300 to 10.0170V
99.830 to 100.170V
698.79 to 701.21V
* If the 5725A amplifier is not available, change the 700V @ 50kHz step to 220V @ 50kHz. Reading
limits for 220V @ 50kHz = 219.36 to 220.64V.

Keithley 2750 Specifications

General

Brand	Keithley
Model	2750
Category	Switch
Language	English