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Monthly Maintenance
CHECK THE HUMIDITY INDICATOR
The spectrometer’s optical components can be easily damaged by excessive moisture in the air. The
spectrometer is sealed and its components are protected by two desiccant canisters that absorb
moisture. A humidity indicator located here monitors the humidity level inside the spectrometer.
You can also monitor the humidity through OMNIC Paradigm software. In the Desktop interface, click
the instrument icon to view the system status, or in the Touchscreen interface, select the Diagnostics
icon. The humidity level is listed in the Environment section.
Figure 4-1: Location of Humidity Indicator
Check the humidity indicator at least once a month and change the desiccant cannisters when needed
(see the table below), or purchase and install a purge kit. See
"Install and Maintain a Purge Kit" for more
information.
Humidity Indicator
State
Meaning Action
Blue Desiccant is fully charged None
Light blue
Desiccant is becoming
saturated with moisture and
no longer providing sufficient
protection
Replace the desiccant
Table 1 - Humidity Indicator States and Recommendations
Thermo Scientific Nicolet Summit LITE FTIR Spectrometer User Guide 43
Maintenance