Metrohm NIRS XDS RapidLiquid Analyzer - Manual (Page 54)

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Photometric Test provides a method to verify ongoing photometric performance of the instrument.
This is a requirement for pharmaceutical users. Test results are stored in the Diagnostic Database, and
may be accessed at any time. Control charts are plotted (after several tests have been stored) to
provide an ongoing record of performance.
The test uses the same standards used in IPV Setup. Photometric Test compares current spectra of
each standard to those stored during IPV Setup. If any differences exceed normal tolerance values,
the instrument can be assumed to have changed in some manner, and may need service.
Because the calibrated photometric standards are the link to previous photometric performance, the
standards should always be stored in their wooden box, and protected from fingerprints, dropping,
or other damage. If any standard is disassembled, dropped, or otherwise altered, Photometric Test
results may fail.
To run Photometric Test, select it from the
Diagnostics menu.
Vision requests a “Standard File”. For
Photometric Test, use the TSSVxxxx.da file
stored in the C:\Vision directory. This file was
created during IPV Setup. Current
photometric readings will be compared to
that initial file.
Click on the TSSVxxxx.da file as shown. (The
serial number will be different, of course.)
Click “Open”.
Do not use the file on the standards diskette
for Photometric Test, as it will cause Vision
to return an error message.