Metrohm NIRS XDS MultiVial Analyzer - Manual (Page 59)

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7
Instrument Diagnostics
Vision provides diagnostics for instrument setup, which 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.
The instrument must be set up with the Iris Adapter or Reference Tray for these diagnostics, as small
round sample cells are used. See section 5.4 for instructions on how to install the Iris Adapter.
7.1 Setup Diagnostics
Before use of the XDS Analyzer, some steps must
be performed using Vision Software.
The “Options” for a given Project may be set. 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
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 a later section. Reference Standardization is performed on both the “Use Iris” level, and
on the “Use Tray” level on XDS MultiVial. This feature must be used to assure method transferability.
Blank Correction:
This is not used on this instrument. It applies only to the XDS Rapid Liquid Analyzer.
Master Standardization:
This method is not used with XDS. Do not select.
Use Instrument Calibration (XDS only):
This is a method to adjust the instrument wavelength profile to an external, traceable wavelength
standard. This feature must be used to assure method transferability.
Use Window Correction (XDS only):