Metrohm NIRS XDS SmartProbe Analyzer - Manual (Page 94)

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6
Instrument fails Instrument
Calibration.
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.
Note that Reference Standardization must be performed
before Instrument Calibration. Verify that this has been
done, and that Reference Standardization is checked in
the DCM.
7
Instrument Gain is excessively
high in Gain Test.
1. NIR Gain should always be less than 100 on the
reference, unless extreme lengths of fiber are used.
If gain is high, verify that the Interactance
Reflectance probe is positioned in the top opening,
against the internal reflectance reference.
2. Verify that lamp is lit. (see above)
8
Instrument cooling fans are
operating at maximum rate.
1. Verify that air intake on side is not blocked by
other equipment. Leave at least 3-4 inches (76-
102mm) space by intake fins for proper airflow.
2. Verify that air filter is clean. If not, clean or replace
filter. If fan speeds dropped shortly after opening
fan filter door, this is a sign of a blocked filter.
3. Verify that the fan exhaust area is not blocked,
restricting the fan outflow. Leave at least 3-4
inches (76-102mm) space by fan exhaust for
proper airflow.
4. Check ambient temperature in area where
instrument is used. If temperature is near the
maximum, fan flow will be high.