Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact - Manual (Page 115)

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Wavelength Linearization is performed again in
two sections, each of which takes about 15
seconds.
Following Wavelength Linearization, the user is asked to select a standard file. This is provided on the
diskette/CD in the Certified Standard box. It may be manually copied on the computer, as shown.
Select this file and click on “Open”.
When prompted, position the WSRxxxxx Wavelength Standard Cell on the fixture as shown.
NOTE: The label should always be in a consistent position for example pointing towards the
operator.
Click “OK” to continue. This test takes about 45 seconds.
The wavelength response for each defined peak is adjusted, to assure precise wavelength registration
between instruments. At the same time, bandwidth (bandpass) is measured, and is iteratively
adjusted to an optimum value for the peaks measured. This is performed to assure good agreement
from instrument to instrument, should multiple instruments be used for analysis of similar products.