CALIBRATION PROCEDURE
NI 4071 7½-Digit FlexDMM
This document contains instructions for writing an external calibration procedure for the
National Instruments PXI-4071 (NI 4071) 7½-digit FlexDMM and 1.8 MS/s isolated digitizer.
For more information about calibration, visit
ni.com/calibration
.
Contents
Software Requirements............................................................................................................. 1
Documentation Requirements .................................................................................................. 1
Password................................................................................................................................... 2
Calibration Interval................................................................................................................... 2
Test Equipment......................................................................................................................... 2
Test Conditions......................................................................................................................... 3
Calibration Procedures ............................................................................................................. 4
Initial Setup....................................................................................................................... 4
Verification Procedures .................................................................................................... 6
Adjustment Procedures...............................................................................................104
DC Voltage .................................................................................................................143
AC Voltage .................................................................................................................144
4-Wire Resistance.......................................................................................................146
2-Wire Resistance.......................................................................................................147
DC Current .................................................................................................................148
AC Current .................................................................................................................150
Frequency ...................................................................................................................151
Appendix A: Calibration Options.......................................................................................151
Where to Go for Support ....................................................................................................155
Software Requirements
NI-DMM supports a number of programming languages including LabVIEW,
LabWindows
™
/CVI
™
, Microsoft Visual C++, and Microsoft Visual Basic. When you install
NI-DMM, you need to install support for only the language you intend to use to write your
calibration utility. The procedures in this document are described using LabVIEW VIs and
C function calls.
Note
You must use NI-DMM version 3.0.2 or later with this calibration procedure.
™