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5.0 MAINTENANCE
The instrument normally requires little maintenance, providing it is used as described in this operat-
ing manual, however, to ensure accurate and reliable operation we recommend calibration once every
6 months (depending on use) at a minimum of once each year.
Points to remember:
• Empty the water catchpot frequently.
• Avoid long sample periods of high gas concentrations. (Do not continuously monitor).
• Avoid air leaks, these will result in inaccurate readings.
Storage: If the instrument is unused for long periods, it is recommended that the power supply is
connected periodically (every 4 weeks) to recharge the batteries. The sensor storage life may also be
sustained by the automatic flushing of air through the sensors.
5.1
FILTER CLEANING AND REPLACEMENT
The particulate filter located at one end of the instrument should be replaced when it has visible signs
of contamination. Unclip the filter and unplug, when replacing check that the filter casing is not dam-
aged and no air leaks exist or errors in readings will occur.
To replace the particulate filter:
1. Unclip and remove old filter; replace with new filter.
5.2
WATER CATCHPOT
Points to remember:
• The water container should be removed after completion of operations and emptied
• Ensure when replacing that a complete air seal is maintained. Check the rubber gasket.
Check the water container is secure, air leaks will result if loose resulting in incorrect readings. To
remove or empty the water container, pull the bottom of the container out from the securing clip, the
unit is hinged and will swing out to about 45°. Unscrew the container and empty out any water.
GAS PRE FILTER
FILTER FITTED
WITH SPACE
AT THE TOP
