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© National Instruments Corporation 41 NI 4070/4072 Calibration Procedure
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 Measurement, 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.
Note NI recommends repeating the verification procedures after you perform these
adjustment procedures. Reverification ensures that the device you have calibrated is
operating within specifications after adjustments.
Caution If you skip any of the steps within a section of the adjustment procedures,
NI-DMM does not allow you to store your new calibration coefficients. Instead, NI-DMM
restores the original coefficients to the EEPROM.
Setting Up the Test Equipment
If you have not already set up the test equipment, complete the following
steps:
1. Remove all connections from the four input banana plug connectors on
the NI 4070/4072.
2. Verify that the calibrator has been calibrated within the time limits
specified in the Required Test Equipment section, and that DC zeros
calibration has been performed within the last 30 days. Consult the
Fluke 5700A/5720A user documentation for instructions on
calibrating these devices.
Note Ensure that the calibrator is warmed up for at least 60 minutes before you begin this
procedure.
3. Reset the calibrator.
4. If you have not already done so, allow the NI 4070/4072 to warm up
for 60 minutes within a powered-on PXI chassis or PC.