Metrohm NIRS XDS MultiVial Analyzer - Manual (Page 85)

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If operating in Reference Standardized mode,
Vision requests the 99% standard from the
set.
If not operating in Reference Standardized
mode, Vision requests the 80% standard,
which is used in place of the internal
instrument reference.
Select the requested standard from the set.
Labels on the back of each standard identify
the reflectance value.
Insert the 99% standard into the tray as
shown, with the label parallel to the long axis
of the tray.
When the 99% standard has been scanned,
the result will be plotted as shown.
In this picture, the upper and lower spectra
are tolerances from the initial IPV Setup
spectrum. The IPV Setup spectrum is the dark
spectrum in the middle, displayed in black on
screen.
The lighter spectrum in the middle (red on
screen) is the current spectrum. It should be
within the upper (blue) and lower (green)
spectra as shown.