FNM alpha SM 230, User Manual, Page: 24 / 72

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Putting into operation
Mounting
General instructions
Mounting instructions for the base module alpha WSN BM 1x0
The base module has to be operated in the indoor area. You just have to mind that
there are good propagation conditions. The base module should not be covered and
not be exposed to direct sunlight.
Instructions for the operation of the PCB version (SM 230, RM 300)
When operating the PCB version with the provided standard antennas, you have to
mind that the antennas need a counterpoise. This means that the antenna has to be
mounted on a conductive base that needs a conductive connection to the ground.
This base should have the shape of a cross (length of every leg approx. 15 cm) and
the antenna should be mounted in the middle. But you can also use a full surface of
the same size.
In case the base is reduced, you will have to expect a deterioration of the propaga-
tion conditions. By this, the efficiency of the wireless measurement system, especially
the efficiency of the range, is restricted.
Furthermore, you should bear in mind that, especially at operation with the power
supply unit with voltages higher than 15 V, there has to be sufficient circulation of air
and there may be no extremely high temperatures at the place of installation.
Please note: The following applies to all units SM 230 and RM 300:
During operation with the power supply unit, no battery may be inserted into the
unit!
Please read the chapter "Antennas" before mounting the units to
walls, ceilings or into housings!