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National Instruments Corporation
11
NI 5922 Calibration Procedure
•
Allow a warm-up time of at least 15 minutes after NI-SCOPE loads.
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 NI 5922 is at a stable operating
temperature.
•
Ensure that the PXI chassis fan speed is set to HI, that the fan filters are
clean, and that the empty slots contain filler panels.
•
Plug the PXI chassis and the calibrator into the same power strip to
avoid ground loops.
External Calibration Procedures
The complete external calibration procedure consists of self-calibrating,
verifying the performance of the digitizer, adjusting the calibration
constants, and verifying again after the adjustments. In some cases, the
complete calibration procedure may not be required. Refer to the
The external calibration procedure automatically stores the calibration date
to allow traceability.
Verifying NI 5922 Specifications
Note
After the 15-minute warm-up time, always self-calibrate the NI 5922 before
beginning a verification procedure.
This section describes the program you must write to verify either the
calibration test limits or the published specifications for the NI 5922. Refer
to the
section to determine which limits to
use in these procedures.
All verification procedures described in this section begin with
niScope_init
(niScope Initialize VI) with
resetDevice
set to
NISCOPE_VAL_TRUE
and end with
niScope_close
(niScope Close VI).
If any of these tests fail immediately after you perform an external
adjustment, verify that you have met the required test conditions listed in
the
External Calibration Requirements
digitizer to NI for repair.
