Keithley 2790, Reference Manual

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Model 2790 SourceMeter
®
Switch System Reference Manual 16-21
5. Source 1kHz and 50kHz AC voltages for each of the ranges summarized in
Table 16-9 and make sure that the respective Model 2790 readings fall within
stated limits.
6. Press the OPEN key to open Channel 1.
Verifying DC current
Check DC current accuracy by applying accurate DC currents from the DC current cali-
brator to the input terminals of the Model 7702 and verifying that the displayed readings
fall within specified limits.
Follow these steps to verify DC current accuracy:
1. Connect the Model 7702 CH41 H and L terminals to the calibrator as shown in
Figure 16-10 .
Figure 16-10
Connections for Model 7702 DC current verification
Table 16-9
Model 7702 ACV reading limits
ACV range
Applied AC
voltage
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
300.000V* 99.910 to 100.090mV
0.99910 to 1.00090V
9.9910 to 10.0090V
99.910 to 100.090V
299.60 to 300.40V 99.830 to 100.170mV
0.99830 to 1.00170V
9.98300 to 10.0170V
99.830 to 100.170V
299.27 to 300.73V
* If the 5725A amplifier is not available, change the 300V @ 50kHz step to 220V @ 50kHz. Reading
limits for 220V @ 50kHz = 219.36 to 220.64V.
TE122
TE121
CH41
OUTPUT
HI
OUTPUT
LO
Calibrator (Output DC Current)
NOTE Be sure calibrator is set for
normal current output.
Model 7702