•
Adjustment Procedures
- Perform an external adjustment of the device that adjusts the
calibration constants with respect to standards of known values.
•
Reverification
- Repeat the verification procedure to ensure that the device is operating
within its specifications after adjustment.
Initial Setup
Note
Ensure that both the calibrator and the PXIe-4080/4082 are warmed up for at
least 60 minutes before you begin this procedure.
To set up the test equipment, complete the following steps:
1.
Remove all connections from the four inputs on the PXIe-4080/4082.
2.
Verify that the calibrator has been calibrated within the time limits specified in the
Test
Equipment
section, and that DC zeros calibration has been performed within the last 30
days. Consult the calibrator user documentation for instructions.
Test Conditions
The following setup and environmental conditions are required to ensure the PXIe-4080/4082
meets published specifications:
•
Ensure that the PXI Express chassis fan speed is set to HIGH and that the fan filters are
clean.
•
Use PXI Express filler panels in all vacant slots to allow proper cooling.
•
Plug the PXI Express chassis and the calibrator into the same power strip to avoid ground
loops.
•
Power on and warm up both the calibrator and the PXIe-4080/4082 for at least 60
minutes before beginning this calibration procedure.
•
Maintain an ambient temperature of 23 ±1 °C.
•
Maintain an ambient relative humidity of less than 80%.
•
Allow the calibrator to settle fully before taking any measurements. Consult the calibrator
user documentation for instructions.
•
Allow the thermal EMF enough time to stabilize when you change connections to the
calibrator or the PXIe-4080/4082. The suggested time periods are stated where necessary
throughout this document.
•
Keep a shorting bar connected between the V-GUARD and GROUND binding posts of
the calibrator at all times.
•
Clean any oxidation from the banana plugs on the cables before plugging them into the
binding posts of the calibrator or the connectors of the PXIe-4080/4082. Oxidation
4
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PXIe-4080/4082 Calibration Procedure