INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 94)

ISP-074-575-P1D 87 87
5. Continue cleaning for approximately one minute.
6. Dampen a new cotton swab with methanol and remove any trace
amounts of the cleaning compound from the lamp window.
7. Wipe the window and the lamp with a dry, lint free tissue to remove any
trace amounts of the cleaning compound and methanol. All traces of
cleaning compound must be removed.
8. If you removed an O-ring from the lamp, replace it now. Ensure your
hands are clean and dry.
9. Without touching the lamp window, replace the lamp as outlined in
Removing and Replacing the UV Lamp on page 84.
Cleaning the Lithium Fluoride Window
To clean the 11.7 eV lamp window:
1. Clean the lamp window with dry aluminum oxide powder on a dry
cotton swab. Do not use methanol or water.
2. Wipe the window and the lamp with a dry, lint free tissue to remove any
trace amounts of the cleaning compound and methanol. All traces of
cleaning compound must be removed.
3. The lamp window can also be regenerated by storing the lamp in a
desiccant for at least 5 days.
NOTE: You may not be able to fully clean the 11.7 eV lamp window.
Replacing the Sample Inlet Filter
The 2020ComboPRO is equipped with a combined dust and water filter to reduce
detector contamination. As the filter collects dust, the 2020ComboPRO’s inlet flow
rate and sensitivity decrease. The filter will not allow water to pass through, but the
filter will not stop all solvents.
NOTE: Do not aspirate liquid samples with the 2020ComboPRO!
Replace the filter on a weekly basis, or more frequently if the 2020ComboPRO is
used in a dusty or wet environment. You must replace the filter if the
2020ComboPRO has been exposed to water. If you are sampling hot gases or
vapors, condensation in the sample line may also affect the filter.
WARNING
Do not replace the inlet filter in a hazardous location.