What is a particulate filter and why do I need one?
A particulate filter removes small particles—dust, pollen and so forth—from the gas stream. This is important because particles degrade the instrument’s performance and must eventually be cleaned out during servicing. The particulate filter is inside the GEM-2000 body, in the back behind the circular door with the large slot in it. The door can be opened with a quarter or something similar. Slide the quarter into the slot and turn counter clockwise. The particulate filter should be checked regularly, at least every three months, and replaced immediately if it is clogged.
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