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National Instruments
3
NI PXIe-4353 Calibration Procedure
Test Conditions
The following setup and environmental conditions are required to ensure the module meets published
specifications.
•
Keep connections to the module as short as possible. Long cables and wires act as antennas, picking
up extra noise that can affect measurements.
•
Use shielded wire for all cable connections to the module. Use twisted-pair wire to eliminate noise.
•
Maintain an ambient temperature of 23 °C ±5 °C. The module temperature will be greater than the
ambient temperature.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of 15 minutes to ensure that the measurement circuitry of the NI PXIe-4353
and CAL-4353 are at a stable operating temperature.
Note
If you are using the Fluke 5520A, allow the calibrator to warm up for 30 minutes and maintain
an ambient temperature of 23 °C ±3 °C.
1
•
Ensure that the PXI Express chassis fan speed is set to HIGH, that the fan filters are clean, and that
the empty slots contain filler panels. For more information, refer to the
Maintain Forced-Air
Cooling Note to Users
document available at
ni.com/manuals
.
NI PXIe-4353 Calibration Procedure
This section provides instructions for verifying the voltage accuracy performance of the NI PXIe-4353.
The calibration process consists of the following steps:
1.
Initial Setup for the NI PXIe-4353
—Install the module and configure it in Measurement &
Automation Explorer (MAX).
2.
Verifying Module Operating Temperature Changes
—Verify that the current module operating
temperature will not cause you to incorrectly calibrate your module.
3.
—Verify the existing operation of the module. This steps confirms whether
the module is operating within its specified range and whether it needs adjustment.
4.
Adjustment
—If the module does not fall within the desired specifications, perform the adjustment
procedure. This will adjust the module calibration constants. If the module does fall within the
desired specifications, but the module has reached its calibration time interval since the last
calibration adjustment, perform the adjustment procedure. Otherwise, performing the adjustment
procedure is optional.
5.
Reverification
—Repeat the verification procedure to ensure that the module is operating within the
published specifications after adjustment.
The first four steps are explained in the following sections.
1
Refer to the Fluke 5520A user manual for the latest set up requirements and recommendations to achieve the best accuracy.
