Thermo Electron Nicolet 380, Руководство пользователя, Страница: 98 / 135

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The spectrometer has been on continuously for one week without
being aligned. We recommended aligning the spectrometer once
a week or, for optimum performance, once a day.
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You have just replaced the laser, source or detector.
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The detector signal intensity has dropped significantly from its
usual level.
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You have just moved the spectrometer.
In OMNIC Help Topics find “aligning, spectrometer” in the Index
and go to “Aligning the spectrometer.”
Does my detector need to be cooled with liquid nitrogen?
MCT detectors need to be cooled. These detectors have a dewar, a
fairly large metal cylinder with a hole in the top. If during a work
session you find that the detector signal intensity is decreasing, the
dewar may need to be refilled with liquid nitrogen.
In Spectrometer Help Topics find “Cooling a detector” in “Using
your spectrometer” help book.
When should I change the desiccant?
When the humidity indicator on the spectrometer cover turns pink,
change the desiccant packs. If the packs are printed with information
about reactivation, you can bake them at the indicated temperature
for the specified time and then store them in a desiccator until the
next time you need to change the desiccant.
You should check the indicator every two months, more often if your
laboratory is not air conditioned or the spectrometer is in a humid
environment.
Thermo Electron Corporation
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