Thermo Scientific Nicolet Continuum, User Manual

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Continuµm User Guide 11
Cooling the detector
The microscope is equipped with one or two single-element
detectors. Most of these detectors must be cooled with liquid
nitrogen before use.
Caution Liquid nitrogen is extremely cold and can cause injury. A warm
laboratory dewar, funnel, and detector may cause the liquid nitrogen
to boil rapidly and spatter. When filling the detector dewar, be
careful not to contact the liquid nitrogen with your skin.
Wear protective gloves and splash-proof goggles and follow
precautions described in the material safety data sheets provided by
your liquid nitrogen vendor.
Also note that liquid nitrogen can be hazardous and create an oxygen
deficient atmosphere if handled in an insufficiently ventilated
room.

Detectors that require cooling are encased in a stainless steel dewar.
Once cooled, the detector will remain cold for about 13 hours. You
can add liquid nitrogen as needed at any time except while you are
collecting spectra.
To cool a detector:
1. Fill a laboratory dewar with approximately 750 ml (26 fluid
ounces) of liquid nitrogen.
Less liquid nitrogen may be needed if the detector was cooled
recently.