Gas Detection (Australia) Pty Ltd
GTD 2000 Ex Operating Manual
Page 24 of 26
M-GTD2000Ex-01-01
11. BEFORE INSTALLING
11.1 Deciding installation site
(Installation site of gas leakage detector should follow the categories below.
1)
Place where gas leakage is suspected such as compressor used for combustible
and/or toxic gases installed inside and outside of a building, valve, reactor, piping
connections and chemical and corrosive installments.
2)
Place where gas may dwell and near source of heat such as a heater in factory.
3)
Connection of chargers for combustible and/or toxic material.
4)
Transformer rooms, distribution rooms, and control rooms in hazardous area.
5)
Other places where gas can congregate easily.
11.2 Deciding installation site
Gas leakage detector should be installed near the places where leakage is suspected.
However, if the place has hazard of gas dwelling but does not have direct leakage, the
detectors should be installed in following places.
1)
Gas leakage detectors, which are installed outside a building, should be installed in
places where gas may dwell considering direction of wind, speed of wind, and
weight of the gas.
2)
Gas leakage detectors, which are installed inside a building, should be installed
near the base of the building if the gas is heavier than air and should be installed
near vent or top of the building if the gas is lighter than air. Gas leakage detectors
should be installed in working places.
11.3 Sensor poisons
Catalytic combustion type sensor may be affected by exposure to air containing certain
chemicals and its sensitivity will be reduced in that case.
Such poisons are;
Halides; compounds containing fluorine, chlorine, iodine and bromine
Glycols, Silicones, Sulphur compounds
If these kinds of chemicals leaks, Gas detector should be recalibrated after such
exposures.
