Metrohm NIRS XDS MasterLab Analyzer User Manual

Page 100

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When all standards are scanned, results are
posted as shown.

When Vision has completed the test, the
tabulated results may be printed. They are
also stored in the Diagnostic Database for
later recall.

There is a tab marked “USP Test”. Click on
this tab to see the USP-suggested plot and
summary report. These are shown on the
next page. (This test is not required as of 12-
1-2008.)

When the test is complete, click “Print
Results” for a hard-copy report. Click “Close
Window” when finished.

If the photometric scale of the instrument has drifted, or if
the instrument is not fully warmed up, the user may see
this message.

Photometric Test is a good check of Reference
Standardization. If Reference Standardization needs to be
re-run, this message will be shown. Re-run Reference
Standardization. If required, run Photometric Test again to
verify that the photometric scale of the instrument is now
reading properly.

USP Photometric Linearity Test is not a true
test of optical linearity, however it is an
accepted test of instrument repeatability at
various absorbance levels.

USP has not defined tests for high-
absorbance tablet transmission applications.
FOSS NIRSystems has provided this test in
anticipation of the need. There is no result at
2000nm, as this wavelength area is not
covered by this instrument in transmission.

This test is not required by USP.