Removing And Cleaning The Pid Bulb; Cleaning Steps - MSA SIRIUS Manual De Instrucciones

7 Warranty, Maintenance, and Troubleshooting

7.3 Removing and Cleaning the PID Bulb

WARNING!
Do not attempt to clean the PID bulb in a hazardous environment. The SIRIUS Multigas
Detector must be turned OFF before cleaning or replacing the bulb and ion chamber.
Using a bulb that is contaminated with dust, dirt or oily residue can impair the perfor-
mance of the instrument. Failure to clean the PID bulb can cause inaccurate readings,
jeopardizing monitoring functions. For the best performance, clean the PID bulb when:
• the monitor does not respond acceptably to a calibration check
• the PID Failed Span Cal occurs (to indicate low output)
• the PID Bulb/Cal Now error occurs
• 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.

7.3.1 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.
NOTE:
Do not touch the bulb lens with your hands. The oily residue from your fingers will
damage the window surface. 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.
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