Keithley 2000, Calibration Manual

Page: 20 / 88

Verifying AC current
Check AC current accuracy by applying accurate AC current at specific frequencies from the
calibrator to the Model 2000 input and verifying that the display reads within specified limits.
Follow these steps to verify the AC current:
1. Connect the Model 2000 AMPS and INPUT LO jacks to the calibrator as shown in Fig-
ure 1-4.
2. Select the AC current function by pressing the ACI key.
3. Set the Model 2000 for the 1A range.
4. Source 1A and 2.2A, 1kHz AC currents as summarized in Table 1-5, and verify that the
readings are within stated limits.
Table 1-5
ACI limits
ACI
Range
Applied AC
current
Reading limits
(1 year, 18°C-28°C)
1kHz
1A
3A 1.000000A
2.20000A
0.998600 to 1.001400A
2.19490 to 2.20510A
2000 MULTIMETER
!
R
5700A Calibrator (Output AC Current)
Output HI
Input
LO Output
LO
Model 2000
Amps
Performance Verification 1-11
Figure 1-4
Connections for
AC current verifi-
cation