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© National Instruments Corporation 7 NI 4070/4072 Calibration Procedure
Fluke 5700A/5720A user documentation for instructions on
calibrating these devices.
Note Ensure that both the calibrator and the NI 4070/4072 (installed in a powered-on
PXI chassis or PC) are warmed up for at least 60 minutes before you begin this procedure.
3. Call
niDMM_init with the resource name of the device to create a
session.
Note You use this session in all subsequent function calls throughout the verification
procedures.
For more information on using
niDMM_init, refer to the NI Digital
Multimeters Help.
4. Call
niDMM_SelfCal. This step is optional if you have adjusted the
NI 4070/4072 within the last 24 hours and the temperature has
remained constant to within ±1 °C of the calibration temperature (T
cal
).
Verification Procedures
You can use the verification procedures described in this section for both
pre-adjustment and post-adjustment verification. The steps of each
verification procedure must be performed in the order listed; however, you
can omit entire sections (for example, the entire Verifying AC Current
section), if necessary.
The parameters Range, Resolution, and Sample Interval used in function
calls throughout this section have floating point values. For example, if
Range =
1, the floating point value is 1.0. The parameters Trigger Count,
Sample Count, Array Size, and ParamValue have integer values. Refer
to the NI Digital Multimeters Help for more information about parameter
values.
Note Many of the parameter values listed in this document are expressed in scientific
notation. Some programming languages do not support the direct entry of numbers in this
format. Be sure to properly enter these values with the appropriate number of zeros. For
example, enter the scientific notation number 10e–6 as
0.00001 and the number 100e3 as
100000. If your programming language supports scientific notation, NI recommends that
you use this feature to minimize possible data entry errors.