Metrohm NIRS XDS MasterLab Analyzer - Manual (Page 92)

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protected and are moved by software command, transparent to the user. When Performance Test is
run, the relative wavelength positions and repeatability of these wavelength materials are monitored
and reported.
Note that these internal wavelength materials need not be precisely on the assigned nominals. These
nominals are arbitrary. The internal wavelength materials are a method to assure stable readings on
the external wavelength standard, measured at the sample plane. Click on the second OpQual tab to
see this display:
7.2.2 Wavelength Certification
Wavelength Certification is used to confirm the peak positions of the instrument to a defined,
external wavelength standard.
Click on Diagnostics,
Wavelength Certification,
Run Wavelength
Certification.
The Number of Samples should be 10, as
shown. The wavelength standard for tablet
transmission is the “Trans Cal Std”, which
refers to the WST4xxxx standard. This
standard is in the Tablet Transmission
Standards tray.
Click “OK” when ready.