Metrohm NIRS XDS RapidContent Analyzer - Manual (Page 58)

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wavelength standard. These are the same peaks used during Instrument Calibration. Wavelength
Certification is a verification that the peaks are in correct positions, and that the peak positions are
consistent over time. Note that both tests use the wavelength standard at the sample plane, where
actual sample measurement is done.
Wavelength Certification is an excellent method to test whether Instrument Calibration needs to be
re-run. If the original settings in Instrument Calibration have drifted, a message will be displayed in
Wavelength Certification that Instrument Calibration should be re-run. Click on the Instrument
Calibration tab to see the results:
The wavelength peaks used here are not the NIST peak positions, though they are within +/- 1.0nm
of the NIST peaks. The peaks used in Instrument Calibration are the peak positions used to assure
transferability of the XDS instrument, and are defined based upon tests of many XDS instruments.
Note that Performance Test measures peak positions of internal reference materials, and these
positions are used as a preliminary method to maintain wavelength measurement. The final
measurement is made at the sample plane, using the external standard. As discussed under
Performance Test, the internal reference materials are not traceable, and are only used as an internal
method of maintaining correct wavelength measurement prior to measurement of the external
wavelength standard.
If the test has passed, the user should click the cursor on the tabular display, go to the File menu, and
click Print to keep a copy of the report. It is saved in the Diagnostic Database for future recall. See the
Vision manual for a full explanation.