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RM-26999 Calibration Procedure
© National Instruments Corporation
15
Verification Procedure
1.
Connect all test equipment except the calibrator, as shown in Figure 2.
Repeat 4 times, once for each channel.
2.
Ensure that the calibrator output is powered off.
Caution: Possibility of Electric Shock
Power off all high-voltage signals and set the calibrator to standby before
making any connections.
3.
Connect the calibrator to the appropriate channel on the DUT. Wait
2 minutes for thermal EMF to stabilize.
Repeat 7 times, once for each frequency setting.
4.
Set the calibrator and the DMM to the appropriate frequency defined in
Repeat 4 times, once for each set of voltage input values.
5.
Configure the DMM to measure the appropriate low voltage input value,
as defined in Table 2.
a.
Implement PRESET before taking the measurement.
b.
Set the ACV function to
Synchronously sub-sampled computed
true rms technique
.
c.
NI recommends enabling LFILTER for frequencies below 50 kHz.
d.
Perform ACAL, if ACAL has not been performed within the last
24 hours or if the temperature has drifted more than
±
1
°
C from
last ACAL temperature.
6.
Configure the calibrator to the appropriate high voltage input value, as
defined in Table 2.
7.
Enable the calibrator to source the high voltage input value.