NI 4065 Calibration Procedure
54
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Caution
If you skip any of the steps within a section of the adjustment procedures, the
niDMM Close External Cal VI and the
niDMM_ExtCalClose
function do
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 input banana plug connectors on the
NI 4065.
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 5700A/5720A user documentation for instructions on
calibrating these devices.
Note
Ensure 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 PXI/PCI/PCIe-4065 to
warm up for 30 minutes within a powered-on chassis or PC and the
NI USB-4065 to warm up for 50 minutes after it is plugged into a USB
port on a powered-on PC.
Adjustment Procedures Initial Setup for Calibration
To initially set up the NI 4065 for calibration, complete the following steps:
1.
Fasten the connectors on one end of the Fluke 5440 cable to the
NI 4065 HI and LO banana plug connectors. Fasten the connectors on
the other end of the cable to the HI and LO calibrator binding posts,
respectively. Figure 1 shows the correct connections for the
NI PXI/PCI/PCIe-4065 and Figure 2 shows the correct connections for
the NI USB-4065. Table 2 lists the cable connections.
2.
If the cable was not previously connected in this configuration, wait
two minutes for the thermal EMF to stabilize.
