Metrohm NIRS XDS RapidContent Analyzer - Manual (Page 48)

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7.1.3 Instrument Calibration
Instrument Calibration uses an NIST-
traceable, stable, standard, of known
wavelength response, as a method to
establish wavelength scale response of
the instrument.
The instrument is set to scan the
standard, and the nominal peak
positions for each major absorption are
determined. Vision performs an
algorithm to set the peak positions of
the instrument to those of the standard.
These adjustments are saved, and are
applied on each subsequent scan of the
instrument, yielding a correct spectrum.
Vision takes an instrument reference, which takes
about 20 seconds. This dialog box is displayed.
Vision determines the detector “time constants” using
a patented algorithm, and sets the proper correction
for this parameter.
Wavelength Linearization is performed in two
sections, each of which takes about 45 seconds.
No user response is required during this test.
Another reference scan is taken, and this box is
displayed. This takes about 20-30 seconds.