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National Instruments Corporation
39
NI 4070/4072 Calibration Procedure
22. Repeat steps 18 through 21, using the parameters shown in
Table 12 for
niDMM_ConfigureMeasurement
and
NIDMM_ATTR_LC_NUMBER_MEAS_TO_AVERAGE
for all verification
capacitors listed.
Note
If you use capacitance verification values that differ from the values listed in
Table 12, verify that each measurement falls between the tolerances listed in Table 24.
The tolerances shown in Table 24 correspond to the NI 4072 accuracy specifications.
You have completed verifying the capacitance and inductance of the
NI 4072. Select one of the following options:
•
If you are performing a pre-adjustment verification, call
niDMM_close
to close the session.
•
If you are performing a post-adjustment verification, go to the
Completing the Adjustment Procedures
section.
Adjustment Procedures
This section explains how to adjust the NI 4070/4072. You can choose to
perform these adjustment procedures with or without performing the
verification procedures first.
The parameters
Range
,
Resolution
,
Expected Value
, and
Frequency
used in function calls in this section have floating point values. For
example, if
Range
=
1
, the floating point value is
1.0
. Refer to the
NI Digital Multimeters Help
for more information about parameter values.
Table 12.
niDMM_ConfigureMeasurement Parameters
Value of
Verification
Capacitor
niDMM Configure Measurement
Parameters
Number of Averages
Range
Resolution
100 nF
100e-9
10e-12
20
1e-6
100e-12
20
10
μ
F
10e-6
1e-9
20
100e-6
10e-9
3
1000
μ
F
1e-3
100e-9
3
10e-3
1e-6
3