Technical data
-8-
!
Always connect the remote control RC2 only for servicing a transmitter without
display.
The remote control RC2 may be used in explosion endangered areas.
They keys, functions and display of the
remote control RC2 are identical with
those of the transmitter.
Mounting Position of Transmitter
!
As per EN 50014 table 4 for devices of group II the casing has been tested with an
impact energy of 4 Joule (low degree of mechanical danger). Protect the casing
against very hard impacts.
It is essential to exactly know the ambient conditions, which have to be taken into consideration
before deciding on the mounting position. To achieve representative measurement results, take care
of
• the room ventilation and
• the gas density.
Install the transmitter at a place where the gases pass the sensor even in case of bad ventilation. If
necessary, use a smoke cartridge to check.
If the transmitter has to be installed at a position, where flow rates can be >3.0m/s, a wind protection
is necessary.
Generally a gas supply to the transmitter from below (sensor side) should be avoided.
Should the gas flow come from below, however, the displayed value may increased beyond the
tolerance as per EN61779-4.
Most combustible gases and vapours are subject to a higher density than air, the transmitter is to be
installed close to the floor. For lighter gases, with a lower density than air, the transmitter is being
mounted close to the ceiling. A few gases have a density which is similar to that of air. For these
gases the transmitter should be mounted at the breathing height of approx. 1.5 m over the floor. The
following chart shows the relative density of some gases and vapours. More detailed information is
available on request.
Gas/Vapour relative gas density
compared with air
Recommended
mounting position
Hydrogen, methane and ammonia lighter close to ceiling
Ethylene, ethane, acetylene, methanol about same at breathing height
Propane, butane, hexane, nonane, propanol,
toluene, ethyl acetate, aceton, diethyl ether, all
other organic solvents and fuel mixtures
heavier close to floor
Furthermore, take the following into consideration as well:
• Rain water, hose water, dripping water, condensate and
• dust in the atmosphere.