NI 5622 Calibration Procedure
8
ni.com
•
Ensure that the PXIe 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
,
available at
ni.com/manuals
.
•
Keep relative humidity between 10% and 90% noncondensing, or
consult the
NI PXIe-5622 Specifications
for the optimum relative
humidity.
•
Maintain an ambient temperature of 23 ±5 °C.
•
Allow a warm-up time of at least 15 minutes after the NI-SCOPE
driver is loaded. Unless manually disabled, NI-SCOPE automatically
loads with the operating system and enables the device. The warm-up
time ensures that the measurement circuitry of the digitizer is at a
stable operating temperature.
•
Plug the PXI Express chassis and the test equipment into the same
power strip to avoid ground loops.
Calibration Procedures
The calibration process includes the following steps.
1.
—Install the device and configure it in Measurement &
Automation Explorer (MAX).
Note
Allow a 15-minute warm-up time before beginning self-calibration.
2.
—Adjust the self-calibration constants of the device.
3.
—Zero the power meter and calculate
power splitter imbalance.
4.
—Verify the existing operation of the device. This step
confirms whether the device is operating within its specified range
prior to calibration.
5.
—Perform an external adjustment of the device that adjusts
the calibration constants with respect to a known voltage source. The
adjustment procedure automatically stores the calibration date on the
EEPROM to allow traceability.
6.
Reverification
—Repeat the verification procedure to ensure that the
device is operating within its specifications after adjustment.
These steps are described in more detail in the following sections.
