Metrohm NIRS XDS MasterLab Analyzer - Manual (Page 56)

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If a Reference Standardization does not exist
for the selected configuration, Vision will
display this message.
The user should perform both Reference
Standardization and Instrument Calibration,
to assure good method transfer.
As explained in the section on Reference Standardization, Vision stores two reflectance references,
based upon whether the sample is scanned directly on the sample window, or on the vial (or tablet)
tray which is raised from the sample window to allow free motion.
By storing two separate reflectance reference files, Vision can compensate for the optical difference
between the two methods.
The first row shows the correct setting for Reference Standardization using the Tray.
When using the Iris Adapter, Reference Standardization is performed using the settings shown below:
If the user does not see the message to perform Reference Standardization and/or Instrument
Calibration, Vision has located the required settings (stored in the instrument) to continue with