Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact - Manual (Page 93)

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Following Wavelength Linearization, the user is
asked to select a standard file. This is located on
the computer in the Vision directory, as shown.
Select the file “TSS3Wxxx” and click on “Open”.
Vision prompts the user to position the probes in
the fixture as shown.
To avoid stray light reaching the probes, the center
area may be covered to avoid light infiltration. The
cover shown is for this purpose.
When prompted, position the WST3Wxxx
Wavelength Standard in the probe area as shown.
NOTE: Slide the probes outward to allow insertion
of the WST3Wxxx Standard into the fixture.
Observe that in the photo above, the left probe
extends inward and will block insertion of the
WST3Wxxx standard, if not retracted slightly.
WST3Wxxx standard, if not retracted slightly.
Re-insert the probes when the standard is in
position.
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.
At the end of the test this dialog box is displayed.
Click “OK” to exit Instrument Calibration