Metrohm NIRS XDS MasterLab Analyzer - Manual (Page 70)

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7
Instrument Diagnostics, Tablet Transmission
Vision provides diagnostics for instrument setup. These diagnostics must be performed before use of
the instrument for analysis. Following these diagnostics, another set of diagnostics is provided to
evaluate the ongoing performance of the instrument. These are explained in the sections that follow.
Before proceeding with a full explanation, it is important to change the instrument settings from
reflectance use to tablet transmission use. Follow these steps:
7.1 Setup Diagnostics, Tablet Transmission
These options may already exist as defaults.
Verify before proceeding.
To reach this menu, click on Configure, Options.
The menu shown at right is the default set of
selections. A brief explanation follows:
Instrument must stabilize before data
acquisition:
This prevents spectral acquisition if the
instrument (or detector) is cold.
Performance Test must pass before data
acquisition:
This prevents the user from taking data on a non-
functional instrument.
Run performance test after wavelength
linearization:
Forces user to run test sequentially. This is not
necessary with XDS.
Use Auto-Linearization:
Maintains correct wavelength registration
automatically, using internal wavelength
materials to keep instrument in precise
adjustment over time.
Reference Standardization:
Used to create a virtual 100% reflectance reference, using a traceable photometric standard. This is
explained in the next section. This feature must be used to assure method transferability.
Blank Correction:
Not used with this instrument. Applies only to XDS Rapid Liquid Analyzer.
Master Standardization:
This method is not used with XDS. Do not select.
Use Instrument Calibration (XDS only):