Metrohm NIRS XDS SmartProbe Analyzer - Manual (Page 93)

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4
Instrument fails Wavelength
Linearization
1. Verify that the Interactance Reflectance probe is
positioned in the top opening, against the internal
reflectance reference, when the test is initiated.
2. Verify that the Wavelength Standard is properly
positioned in the sample drawer when prompted
by software. Be sure the Interactance Reflectance
probe is positioned in the middle opening when
directed to scan the WSR Wavelength Standard,
and the probe is in contact with the WSR
Wavelength Standard.
3. Instrumental problems – contact Metrohm service
or your authorized distributor.
5
Instrument Fails Performance
Test.
1. Verify that the Interactance Reflectance probe is
positioned in the top opening, against the internal
reflectance reference, when the test is initiated.
2. Temperature and/or humidity may be changing
rapidly during the test. This can usually be
observed as large spectral activity between 1300-
1400nm and 1800-1900nm. If this is the case, the
instrument should be tested in a more controlled
setting to verify proper operation.
3. Instrument may be located on a bench with
grinders, stirrers, or other laboratory equipment
which produces vibration or mechanical
disturbance. This shows up as spectral activity in
various areas, depending upon the transmitted
frequency of the motion. Turn off all equipment
that might cause such disturbance. Locate it to
another part of the laboratory, or place it on
isolated supports away from the XDS Analyzer.
4. Increasing noise in Performance Test may indicate
a gradually failing lamp. Performance Test is very
sensitive to any optical changes in the instrument,
including noise caused by lamp issues. Be sure the
instrument is warmed up, then run the test again.
If it continues to fail, consider a lamp change to
remedy the problem.