Sensitron SMART3G-C3 - Special Conditions for Safe Use

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Pag. 25
3.3 Environment conditions
The gas detector can be used in the temperature range reported on the label. It is suitable
for indoor and outdoor installations, depending on dust protection, IP grade and relative
humidity reported on the label.
When preparing the installation site, it is necessary to take into account the nature of the gas
to be detected and the presence of chemical agents in the environment
³ All of the gases lighter than air (Methane, Hydrogen, Ammonia) tend to spread
upwards; the detector should be placed at 30 cm from the ceiling in order to maximise
the eectiveness of the detection.
³ All of the gases heavier than air (LPG, Butane, Petrol Vapours) tend to spread downwards;
the detector should be placed at 30 cm from the oor.
In case of varnished aluminium enclosures there’s the possibility of electric charges accu-
mulation. This accumulation could generate a ame under extreme conditions. To avoid this
risk, the user has to guarantee that the equipment won’t be installed in places where extre-
me conditions could provoke an accumulation of electrostatic charges. Moreover, the user
has to clean the equipment with a damp cloth.
Do not use gas detectors in atmospheres with a oxygen concentration greater than 21%.
4. Special conditions for safe use
³ The installation, use, maintenance and restoration must be done following the Safety
Instructions supplied by Sensitron.
³ The gas detector installation must guarantee the equipotential connection of the en-
closure.
³ Only the models equipped with dust lter can be installed in zone 22.
³ The dust lter has a membrane, this must not be damaged or removed. Moreover, the
membrane cannot be touched with bare hands to avoid lter damage.
³ For models with varnished aluminium enclosures, there’s the risk of electrostatic char-
ges accumulation. The equipment must be cleaned with a damp cloth or antistatic
products.
³ The operating temperature conditions are described in the label, they are compatible
with sensing elements’ operating temperatures.
WARNING!