Checking And Changing The Purge Gas Filter - Thermo Scientific Nicolet Series User Manual

Checking and Changing the Purge Gas Filter

Thermo Scientific
NOTICE
• If you are going to dry and reuse saturated desiccant canisters, make sure you have
fresh desiccant canisters you can place in the instrument while the saturated canisters
dry.
• Do not leave canisters in the oven for more than three hours and do not exceed a
temperature of 150 °C (about 300 °F).
• Make sure the insulated cloth or hot pad you use to handle the regenerated desiccant
canisters is not contaminated with substances that could be absorbed by the desiccant
and subsequently released into your instrument.
1. Place the saturated desiccant canisters in a vented oven at 150 °C (about 300 °F) for three
hours.
CAUTION To avoid a burn hazard, use an insulated cloth or hot pad to handle the heated
desiccant canisters, and always wait until the canisters have cooled to room temperature
before you reinstall them in the instrument.
2. Use an insulated cloth or hot pad to remove the desiccant canisters from the oven.
Allow the canisters to cool on the hot pad or cloth, and do not attempt to handle or
install them until they have cooled to room temperature. As soon as the canisters reach
room temperature, however, you must either install them in the instrument or seal them
in an airtight container or bag. Otherwise, they will absorb moisture from the air in the
room and quickly become saturated again.
Check the purge filter occasionally to make sure it is clean and dry. (The drawing below shows
where the purge filter is located.)
If the filter is green, it does not need to be replaced. If it is yellow, or otherwise discolored,
replace it according to the following procedure.
Maintaining Your Instrument
Checking and Changing the Purge Gas Filter
Nicolet iS20 User Guide 27