Metrohm NIRS XDS Interactance OptiProbe Analyzer - Manual (Page 45)

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The “visible” portion of the
spectrum is similar. A linearization
is applied to this portion of the
spectrum.
Minor artifacts appear in these
raw spectra due to detector
crossover and other spectroscopic
reasons. After linearization these
artifacts are minimal or not
evident, some being beyond the
usable range of the instrument.
These peak positions are not meant to be traceable, as the wavelength calibration of the instrument
is done on an external standard, traceable to NIST.
The internal wavelength materials are used to maintain the wavelength registration of the
instrument. This is done by software. Final, tighter adjustments are later performed in Instrument
Calibration.
Select Wavelength Linearization from the
Diagnostics menu. The instrument will scan the
instrument reference.
Vision prompts to position the reference. Verify
that the OptiProbe is positioned as shown.
Verify the probe position and click “OK”.