PerkinElmer Photovac 2020, Manual

Page: 120 / 190

2020 Software Manual
118
Hot gases and vapors may contribute to a decrease in sensitivity
because they may condense on the lamp window. Condensation
may eventually evaporate off the window, but it will usually leave a
residue that must be removed by cleaning the lamp window.
Since some UV inhibiting deposits are invisible to the eye, regular
cleaning of the lamp window is strongly recommended. Clean the
lamp frequently to prevent a heavy build-up of deposits that may be
difficult to remove. As a guide, clean the window every 24 hours of
operation.
WARNING
Do not remove the UV lamp in a hazardous location.
The UV lamp cleaning kit (Part No. MX380336) includes aluminum
oxide powder (3.0 micron powder) and cotton swabs. Additionally,
you will require approximately 10 mL of methanol. When ordering
methanol, specify purge and trap grade.
The instructions provided below are for 8.4 eV, 9.5 eV, 10.0 eV and
10.6 eV lamps. Refer to
Cleaning the Lithium Fluoride Window
on page 120 for special instruction to clean the 11.7 eV lamp
window.
WARNING
Never touch the UV lamp window with your fingers
To clean the UV lamp:
1. Remove the lamp as outlined in Removing and
Replacing the UV Lamp on page 116.