Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact - Manual (Page 97)

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2. Select the channel to be used for the test.
In this case, we select “SAMPLE”. The end
of the Interactance Immersion probe
should be protected from stray light for
this test.
This tests the sample channel, and provides
a comprehensive test of instrument
performance.
Vision provides a split-screen display that details instrument performance. The lower right quadrant
shows tabulated data. Double-click to enlarge this screen to full size. When the test is complete, tabs
shows results.
11.5 XDS PA Silicon
The Transmission Probes require special methods of calibration. One
fiber bundle carries “white light” from the instrument to the sample.
The other fiber bundle is used to return light to the instrument, to be
broken down in the monochromator to individual wavelengths, then
measured for spectral response. Absorbance of the sample is then
determined.
11.5.1 Wavelength Linearization, Transmission Probes