Setting Up The Test Equipment; Adjusting Dc Voltage And Resistance - National Instruments PXI-4070 6 1/2 Digit FlexDMM Calibration Procedure

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

Ensure that the calibrator is warmed up for at least 30 minutes before you begin this
Note
procedure.

Adjusting DC Voltage and Resistance

Caution Step 1 must be performed correctly to avoid shorting on unconnected spade lugs.
NI PXI-4070 Calibration Procedure
For example, if Range =
NI Digital Multimeters Help for more information.
If you have not already set up the test equipment, complete the following
steps:
1. Remove all connections from the four input banana connectors on the
NI 4070.
2. Verify that the calibrator has been calibrated within the time limits
specified in the Required Test Equipment
calibration has been performed within the last 30 days. Consult the
Fluke 5700A/5720A user documentation for instructions on
calibrating these devices.
3. Reset the calibrator.
4. If you have not already done so, allow the NI 4070 to warm up for
30 minutes within a powered-on PXI chassis.
To adjust the DC voltage and resistance of the NI 4070, complete the
following steps:
1. Connect the calibration cable assembly with the connector block
plugged into the NI 4070 and with the spade lugs connected to the
appropriate binding posts on the calibrator, as described in Figure 3
and Table 1.
2. Wait two minutes for the thermal EMF to stabilize if the calibration
cable assembly was not previously connected in this configuration.
, the floating point value is
1
40
. Refer to the
1.0
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