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5. Maintenance
In order to maintain the good working condition of the TDL 300, the
following maintenance should be performed as indicated:
1. Put the detector back into the carrying case, and recharge the
battery to full capacity after each use to ensure battery life.
2. If needed, clean the outer surface of the device with a clean cloth.
3. No need to clean the optical lens frequently. If needed, use a
dust blower to blow away dust on lens. Then, use medical gauze
or an equivalent non-abrasive lens tissue with a small amount of
alcohol. Avoid scratching the lens.
4. Contact a local distributor for assistance in changing or replacing
accessories and parts or directly contact ICI.
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5. To determine the location of a gas leak, work the laser beam in a
stable "S" pattern route back and forth to ensure the laser passes
through the target area. A constant alarm sound indicates a leak,
and operators should check where the sound is the loudest.
6. The TDL 300 can detect gas leaks from up to 30 m. Actual
distance may vary due to target surface and environmental
conditions. As the scanning distance is increased, the laser light
returned will decrease. As the maximum distance is approached,
a low fault alarm will sound telling you to move closer or change
the scanning angle in order to continue detection. It is best to
scan within 10 m to 20 m of the target.
• Experience with the TDL 300 will make aiming at the target
position easier and ensure the laser beam passes through the
target are.
• Windy weather or high temperatures will lead to rapid diffusion of
gas. Scan against the wind
• Methane's density is lighter than air. Scan directly over places
where gas leaks are likely to occur.
• The detection beam is a cone-shape. The spot/beam width size
will become larger with increased scanning distance and is
around 50 cm at 30 m.
• Obstructions or variations in landscape can cause dark zones
where the laser cannot scan. Change to a better angle and scan
the location again.
• Strong reflection off certain types of surfaces, e.g. stainless steel,
glass, polished surfaces, reflectors, etc., may give false readings.
Rescan the area from a different angle.
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