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NI 4071 7½-Digit FlexDMM Calibration Procedure
You have completed verifying the frequency of the NI 4071. Select one of the following options:
•
If you do
not
want to verify other modes
and
you are performing a
post-adjustment
verification, go to the
Completing the Adjustment Procedures
section.
•
If you do
not
want to verify any additional modes
and
you are performing a
pre-adjustment
verification, call the niDMM Close VI to close the session.
Adjustment Procedures
This section explains how to adjust the NI 4071. 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 4071.
2.
Verify that the calibrator has been calibrated within the time limits specified in the
section, and that DC zeros calibration has been performed within the last 30
days. Consult the Fluke 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 4071 to warm up for 60 minutes within a
powered-on PXI chassis.
LabVIEW Block Diagram
C/C++ Function Call
Call
niDMM_close
with the
following parameters:
Instrument_Handle
:
The instrument
handle from
niDMM_init