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NI 4071 7½-Digit FlexDMM Calibration Procedure
Documentation Requirements
In addition to this calibration document, you may find the following references helpful in writing
your calibration utility. All these documents are installed on your computer when you install
NI-DMM. To locate them, select
Start»All Programs»National Instruments»NI-DMM»
Documentation
.
•
NI Digital Multimeters Help
•
NI Digital Multimeters Getting Started Guide
NI recommends referring to the
NI 4071 Specifications
online at
ni.com/
manuals
to ensure you are using the latest NI 4071 specifications.
Calibration Function Reference
For detailed information about the NI-DMM calibration VIs and functions in this procedure,
refer to the
LabVIEW reference
or the
C/CVI/VB reference
sections of the
NI Digital
Multimeters Help
, located at
Start»All Programs»National Instruments»NI-DMM
»Documentation
. Refer to Figure 7 for the procedural flow for verification. Refer to Figure 8
for the procedural flow for adjustment.
Password
The password is required to open an external calibration session. If the password has not been
changed since manufacturing, the password is
NI
.
Calibration Interval
The accuracy requirements of your measurement application determine how often you should
calibrate the NI 4071. NI recommends performing a complete calibration at least once every two
years. NI does not guarantee the absolute accuracy of the NI 4071 beyond this two-year
calibration interval. You can shorten the calibration interval based on the demands of your
application. Refer to
Appendix A: Calibration Options
for more information.
Test Equipment
Table 1 lists the equipment required for calibrating the NI 4071. If you do not have the
recommended instruments, use these specifications to select a substitute calibration standard.
Table 1.
Required Test Equipment
Required Equipment
Recommended Models
Multifunction calibrator
Fluke 5720A
*
(calibrated within the last 90 days)
Two sets of low thermal electromotive force
(EMF) copper cables
Two sets of Fluke 5440 cables
