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What is the minimum distance I should keep from a wall or any other
object?
Much depends on the type of material it is made, its density, how the
environmental factors affect it.
If we take the example of an area monitor mounted on a wall bracket, we
must also consider how the latter will act on the signal that it is going to
measure. If the wall was made of polystyrene, the control unit could also be
attached to it, but in reality the density of the materials with which the wall is
made, affects the signal.
It is also necessary to consider the atmospheric phenomena which, in
conjunction with the structures around the control unit, can affect the signal.
During a rain, with the slightly wet wall, will the reflected signal be the same?
And if instead of just being slightly wet it was completely covered with water?
How does the refraction of the signal change?
It should be remembered that the area monitor measures a true value. If in a
point the antenna marks 10 V/m, it is because in that precise point there are
actually 10 V/m, which is the result of the sum of all vectorial components, so
both the direct and the reflected signals.
How do I know what is the most suitable point?
Good sense says that at least 3 to 4 meters away help minimize possible
perturbations of the signal that you go to measure.
The best approach would be to use a wide bandwidth meter and make pads
in some parts of the area chosen for installation, trying to locate an area
where the signal is more homogeneous.
You do not just have to consider radio frequency though. Area monitors are
programmed to send data using a SIM card. So also the presence of the
3G/4G GSM signal is important. We recommend using a cell phone to
evaluate the presence and quality of cell signal.
When set the internal clock?
Every time the Area monitor is switched OFF, and the battery pack
disconnected from it, the internal clock has to be set.
It is always better prepare the first installation on site with the help of a laptop
or a tablet to verify that internal clock has the right hour and date
7-12
Troubleshooting
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