Metrohm NIRS XDS Process Analyzer – MicroBundle - Manual (Page 79)

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Vision prompts the user to position the WSR103xx standard
on the probe.
When prompted, position the WSR103xx Wavelength
Standard Cell on the probe as shown. The label should
always be in a consistent position. In this case, the bottom
of the label is parallel with the holder.
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.
Select the next channel, if used. From the menu bar, click
on Acquire, then Select Channel. Use the spinner to select
the correct channel, then click on “OK”.
This must be performed for each channel. Always verify the
channel before proceeding with the test.
Information about the Reflectance wavelength standard:
The reflectance wavelength standard used is directly traceable to NIST SRM-1920a, through direct
comparison on the Metrohm Master Reflectance Instrument, and in chemical formulation. In addition
to the prescribed formulation, one additional ingredient is added, in a small amount, to provide