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CALIBRATION PROCEDURE
NI 4070/4072 6½-Digit FlexDMM
This document contains step-by-step instructions for writing an external
calibration procedure for the National Instruments PXI/PCI-4070 and
NI PXI-4072 digital multimeters (DMMs). Each of these
National Instruments DMMs is a 6½-digit FlexDMM and 1.8 MS/s
isolated digitizer. For more information on calibration, visit
ni.com/
calibration
.
Contents
Conventions ............................................................................................2
Software Requirements...........................................................................2
Documentation Requirements.................................................................3
Calibration Function Reference.......................................................3
Password .................................................................................................3
Calibration Interval .................................................................................4
Test Equipment .......................................................................................4
Required Test Equipment ................................................................4
Optional Test Equipment.................................................................5
Test Conditions .......................................................................................5
Calibration Procedures............................................................................6
Initial Setup......................................................................................6
Verification Procedures ...................................................................7
Adjustment Procedures....................................................................41
Verification Limits..................................................................................58
DC Voltage ......................................................................................58
AC Voltage ......................................................................................59
4-Wire Resistance............................................................................61
2-Wire Resistance............................................................................61
DC Current.......................................................................................62
AC Current.......................................................................................62
Frequency.........................................................................................63
Capacitance and Inductance.............................................................63
Appendix A: Calibration Options ...........................................................64
Where to Go for Support.........................................................................68
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