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FirstCheck+ 1, 2, 3 & 5000
Maintenance
1. Keep the PID detector lamp window clean.
2. Replace the sample filters on a regular basis.
Frequency of cleaning the detector lamp and replacement of the filter depends on the type of gas
being detected and the quality of the backgr ound air (see page 49 for details of parts expected life
time.)
Cleaning the FirstCheck+ Lamp
The FirstCheck+ PID relies on an ultraviolet light source ionising VOC gases as they pass across the lamp
window. This process may result in a very fine layer of contamination appearing on the detector window that
must be removed on a regular basis.
CAUTION!
The FirstCheck+ is a sensitive detector. Internal components must be handled with clean hands and
clean tools. The FirstCheck+ lamp is fragile. Handle with great care!
1. Ensure that the FirstCheck+ is switched OFF.
2. Remove the probe and filter.
3. Unscrew the black knurled ring to expose the detector
.
lamp
4. Push a lamp-removing sleeve over the end of the lamp.
This allows the user to grip the glass.
5. Extract the lamp from its socket by pulling it in a straight
Away from the PID cell. Force is onl y required when
Pulling the lamp past the O ring. Once past the O ring
The lamp will move freely.
WARNING!
NEVER REFIT A DAMAGED LAMP!
Ion Scie nce Lt d
Page 42 of 53
Ion Science L td
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Passed the
O-ring
Move freely in
a straight line
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