Metrohm Vision – Diagnostics - Manual (Page 56)

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Instrument Calibration (XDS instruments only)
Instrument Calibration uses a NIST-traceable, stable, standard, of known wavelength response, as a
method to establish wavelength scale response of the instrument. Instrument Calibration aligns the
wavelengths to exact positions typically reporting a 0.0 difference between known and measured
positions.
When calibration or library transfer between instruments is anticipated, be sure to use Instrument
Calibration. This feature along with Reference Standardization and Blank Correction (transmission)
assures best method transfer between similar XDS instruments. For more detailed information about
a specific XDS analyzer, please refer to the Installation and User Manual supplied with the analyzer.
The instrument is set to scan the wavelength standard, and the nominal peak positions for each
majors absorption are determined. Vision performs an algorithm to set the peak positions of the
instrument to those of the standard. These adjustments are saved, and are applied on each
subsequent scan of the instrument, yielding a correct spectrum.
Vision takes an instrument reference, which takes
about 20 seconds. This dialog box is displayed
Next a sample scan is taken, and this box is displayed.
This takes about 20-30 seconds.