NI 5421/5441 Calibration Procedure
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You cannot perform an external calibration using a standard NI-FGEN
session. You must create an external calibration session using
niFgen_InitExtCal
(niFgen Init Ext Cal VI). An external calibration
session allows you to use NI-FGEN functions and attributes that are
specifically for external calibration, while still allowing you to use all
the standard NI-FGEN functions and attributes with the external calibration
session.
Along with the standard NI-FGEN attributes, the external calibration
session uses a set of calibration constants that are determined during the
calibration procedure and stored in the device onboard memory when
the session is closed. NI-FGEN uses these calibration constants during
a standard NI-FGEN session to ensure that the device operates within its
specifications.
You must close an external calibration session by using
niFgen_CloseExtCal
(niFgen Close Ext Cal VI), as shown in Figure 4.
