Cleaning the uv lamp window – INFICON 2020ComboPRO Portable Photoionization Detector User Manual
Page 92

ISP-074-575-P1D
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2. Remove the lamp housing cover using the multi-tool.
3. Tilt the 2020ComboPRO slightly and remove the UV lamp.
CAUTION
Do not touch the wire grid inside the detector cell. Any dust or dirt in the
detector cell can be blown out with a gentle jet of compressed air.
Do not insert any object, other than the UV lamp, into the lamp holder.
4. Without touching the lamp window, place the new lamp into the
2020ComboPRO
lamp holder, window first. See Figure 26.
Figure 27. Removing the UV Lamp
NOTE: Do not force the lamp into the lamp holder.
5. Replace the lamp housing cover. Tighten the cover down with the multi-
tool. Do not over tighten.
6. Calibrate the 2020ComboPRO and then continue normal operation.
Cleaning the UV Lamp Window
During the course of normal operation, a film builds up on the window of the UV
lamp. The rate at which the film develops depends on the type and concentration of
the gases and vapors being sampled, and results from the UV light interacting with
them.
Hot gases and vapors encountered when sampling may contribute to a decrease in
sensitivity because they may condense on the lamp window. Condensation may
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