Cleaning Steps; Caution - MSA Sirius Operating Manual

• the PID shows increased sensitivity to humidity
• the displayed PID reading is erratic.
If you are operating the monitor in a high temperature, high humidity, or
dirty environment, you may need to clean the lamp more frequently to
maintain optimal performance.
NOTES:
• Perform this procedure using methanol only.
• After cleaning, if the instrument still fails to calibrate, replace the
bulb.
• All cleaning must be done in a clean, non-hazardous environment.

Cleaning Steps

1. Turn OFF the instrument.
2. While in a non-hazardous and non-combustible area, remove the
battery pack.
3. Use a coin to gently unscrew the bulb access cap; set the cap on a
clean surface.
NOTE: If the alternate tamper-resistant bulb access cap is
installed, the special tool provided with the cap must be
used.
4. Gently grasp the tapered end of the rubber bulb holder attached to
the tip of the bulb and firmly pull the bulb holder straight out until
the bulb comes free from the assembly.
Do not touch the bulb lens with your hands. The oily residue
from your fingers will damage the window surface.
NOTE: Inspect the bulb window for scratches. Minor scratches
should not affect bulb performance. If severe scratches
and chips are present, replace the bulb.
Be careful not to allow dirt or particulates to fall into the bulb
hole in the instrument.
5. Remove the rubber bulb holder from the end of the bulb and set
the bulb holder on a clean surface.

" CAUTION

"
" CAUTION
"
6-3