Keithley 2002, Руководство по калибровке

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Performance Verification
1-12
1.8.4 AC current verification
AC current verification is performed by applying accurate
AC currents at specific frequencies and then verifying that
Model 2002 readings fall within specified limits.
Follow the steps below to verify ACI measurement accuracy.
CAUTION
Do not apply more than 2A, 250V to the
AMPS input, or the current protection
fuse will blow.
1. Connect the Model 2002 to the calibrator, as shown in
Figure 1-5. Be sure to connect calibrator HI to the
AMPS input, and connect calibrator LO to INPUT LO
as shown.
2. Turn on the Model 2002 and the calibrator, and allow a
one-hour warm-up period before making measure-
ments. Be sure the calibrator is set for normal current
output.
3. Restore Model 2002 factory default conditions, as
explained in paragraph 1.7.
4. Select the AC current function and the 200µA range on
the Model 2002.
5. Set the calibrator output to 190.000µA AC at a fre-
quency of 40Hz, and allow the reading to settle.
6. Verify that the Model 2002 reading is within the limits
for the present current and frequency summarized in
Table 1-7.
7. Repeat steps 5 and 6 for each frequency listed in Table
1-7.
8. Repeat steps 5 through 7 for the remaining ranges and
frequencies listed in Table 1-7.
Figure 1-5
Connections for AC current verification
2002 MULTIMETER
Output HI
Input
LO
Output
LO
Model 2002
5700A Calibrator (Output AC Current)
Amps
Note : Be sure calibrator is set for
normal current output.
190.000 µAAC RMS