Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact - Manual (Page 133)

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3
Lamp does not
come on when
instrument is
connected.
1. Verify communication with instrument. Click on Acquire,
Disconnect, then Acquire, Connect, Select DCM to verify
proper connection. If lamp does not come on, replace lamp
according to instructions provided in part 11.2 of this
manual. Do not attempt to replace lamp with AC power
applied.
2. Lamp may be burned out. This should not occur for
thousands of hours of normal use, but could be caused by
jarring or other physical motion. Replace lamp.
3. Instrument thermal shutdown may have occurred due to
high internal operating temperatures. Determine cause of
high temperature and correct before subsequent operation.
4
Instrument fails
Wavelength
Linearization
1. Instrumental problems – contact Metrohm service or your
authorized distributor.
5
Instrument Fails
Performance Test.
1. 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. Be sure
the instrument enclosure is closed and locked. Allow to
stabilize.
2. Instrument may be located near grinders, stirrers, or other
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 offending equipment to another area, or
place it on isolated supports away from the XDS Process
Analytics Instrument.
6
Instrument fails
Instrument
Calibration.
1. Verify that the Wavelength Standard is properly positioned
when prompted by software.
2. In Interactance Reflectance, use the WSR103xx standard.
3. In transmission, use the WST3WCAL standard.
7
Instrument Gain is
excessively high in
Gain Test.
1. NIR Gain should always be less than 100 on the reference. If
gain is high, check for fiber breakage.
2. Verify that lamp is lit. (see above)
If these measures do not correct the problem, please contact Metrohm service or your next sales and
distribution office.