9023744 - 3rd edition - October 2005
Installing Transmitters Polytron Ex resp. Ex R
Installing Transmitters Polytron Ex resp. Ex R
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Select installation location in accordance with local regulations.
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Avoid external influences such as splashing water, oil etc. and the possibility of
mechanical damage.
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Electrical wiring is only to be laid and connected by an expert paying attention to
the pertinent regulations and laws concerning electrical equipment in potentially
explosive atmospheres as well as the approval conditions.
Transmitter Polytron Ex resp. Sensing Head SE Ex:
Pay attention to density of gas!
— In case of gases, the density of which is lower than that of air, such as hydrogen,
methane or ammonia the transmitter resp. sensing head must be located above a
possible leak or at the highest points at which major concentrations of gas may
be found.
— In case of gases and vapours with a density greater than that of air, the sensing
head resp. transmitter must be installed beneath a possible leak or at the lowest
points at which such gases and vapours may be present.
Pay attention to ventilation!
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Always arrange sensing head resp. transmitter in air flow between possible leak
or collection point and possible source of ignition.
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Install in vertical position (sensing head with the diffusion surface facing down-
wards) at a low-vibration location with maximum possible temperature stability (no
direct sunlight) in the vicinity of a possible leak.
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Leave at least 30 cm (12") free space beneath the sensing head resp. transmitter
to provide accessibility for calibration work.
Mounting of the Transmitter Polytron Ex
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Mount with four screws through the housing
or
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by means of the mounting brackets.
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