Elkron MR16 Guide D'utilisation Rapide page 14

WARNINGS FOR CORRECT INSTALLATION
Maximum distance in the connection between two radio sets is determined by the strength and cleanness of
signal from receiving set. A number of factors may either reduce the strength of received signal or interfere
with signal reception. With proper contrivances, these factors can be removed or minimised.
The strength of radio signal is affected either by the absorption of materials the signal is to run through or by
radio waves reflection phenomena. Below table shows how the different materials affect the power of
transmitted radio signal.
Low absorption
Wood (e.g. cabinets,
furniture), plastic,
synthetic materials (e.g.
plexiglas), glass, drilled
bricks (e.g. partition
walls).
In some cases, the signal may practically extinguish, e.g. inside metal cabinets.
On the contrary, radio signal may be jammed by not sufficiently screened electronic equipment, electric
motors or other devices working in radio frequency.
For radio devices correct installation apply following precautions:
• position the devices far from sources of electromagnetic noise, such as electric motors, electric
panels,etc.;
• do not mount the devices on metal surfaces or close to large metal objects, or inside metal structures,
such as metal boxes or cabinets;
• should chosen position not allow suitable radio communication, try to displace the device to another
position to see if radio communication is improving.
Warning: always displace peripheral unit (detector, siren, etc.), not radio module.
Medium absorption
Water(e.g. aquariums),
integer bricks, marble.
High absorption
Concrete, bulletproof
windows, metal
structures (e.g.
household appliances,
piping, railings)
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Reflection
Mirrors, metal surfaces