Maintaining Your Instrument
Checking the Humidity Indicator
22
Nicolet iS20 User Guide
Thermo Scientific
Checking the Humidity Indicator
The optical components of your instrument are protected by two desiccant canisters that
absorb moisture. As long as the humidity indicator on your instrument’s main cover is blue,
the desiccant canisters are not saturated and do not need to be replaced. When the desiccant
canisters become saturated, the humidity indicator turns pink and then white. This means
you must replace the desiccant cartridges, and you may need to replace the humidity indicator
as well.
Replacing the Humidity Indicator
The humidity indicator must be replaced when it turns white or does not return to blue after
the desiccant has been replaced.
Time needed:
Less than 1 minute
Tools needed:
Gloves, finger cots, or laboratory tissue
Replacement humidity indicator
NOTICE
• Check the humidity indicator every time you use your instrument. If use the
instrument infrequently, make sure you check the indicator at least once a month.
• We recommend that you maintain seal and desiccation and/or purge your instrument
at all times. Equipment damage due to failure to maintain seal and desiccation and/or
purge is not covered under the warranty. If you have questions about this
requirement, please contact us.
Humidity indicator
NOTICE
Use only Thermo Scientific certified replacement parts. To order parts, contact
us.
