Metrohm NIRS XDS MasterLab Analyzer - Manual (Page 158)

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5
Instrument fails Wavelength
Linearization
1. Instrument Reference is not in correct position.
Verify that reference paddle is visible in MasterLab
Analyzer sample window when a reflectance
reference scan is taken.
2. MasterLab, transmission: The tablet transmission
reference may not be in position, the detector may
not be in the “lowered” position, or the instrument
beam may be blocked. Correct these conditions
and re-try.
3. Instrumental problems – contact Metrohm service
or your authorized distributor.
6
Instrument Fails Performance
Test.
1. Verify that reference paddle is visible in MasterLab
Analyzer sample window when a reflectance
reference scan is taken.
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.