Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact - Manual (Page 91)

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8. 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.
11.4.4 Instrument Calibration, Transmission Probes
First select the channel. 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.
Instrument Calibration uses a traceable, stable,
standard, of known wavelength response, as a
method to establish wavelength scale response of
the instrument.
The instrument is set to scan the standard, and the
nominal peak positions for each major absorption
are determined. Vision performs an algorithm to
set the peak positions of the instrument to those
of the standard. These adjustments are saved, and
are applied on each subsequent scan of the
instrument, yielding a correct spectrum.
This adjustment is performed in Transmission,
using the calibration jig for the fiber bundles as
shown.
For instruments that ship as of late 2004, a
calibrated wavelength standard (XC-1300) is used,
with serial number WST3Wxxx.