CIAS Elettronica S.r.l.
Ed 2.0
Installation Handbook
page
25
to
44
ERMUSA
2.3 Ground conditions
It is inadvisable to install the equipment along sections with tall grass (more than 10 cm),
ponds, longitudinal waterways, and all those types of grounds whose structure is rapidly
mutable.
2.4 Presence of Obstacles
The fences, are generally metallic therefore highly reflecting hence causing various problems,
for this reasons some precautions are suggested:
- first of all, make sure that the fence has been properly
fixed
in order that the wind does
not move.
- if it is possible the microwave beam
should
n’t
be placed in
parallel
to a metallic fence,
is necessary to create a corner with it.
- metal fences placed behind the equipment might cause distortions to the sensitive beam
especially, and might cause movement detection in unexpected spots, with subsequent
likely generation of false alarms.
- In case of Mw barrier should be installed in a corridor between two metallic fences, the
width of the corridor should be necessary not less to 5 m.
Along the section, within the area of the protection field, are allowed pipes, poles or similar
(e.g., lamp posts) as long as their dimensions, with respect to the protection beam, are not too
excessive. The trees, hedges, bushes in general, need
very great attention
if near or within
the protection beams. These obstacles vary in size and position, in fact they grow and they can
be moved by the wind. Therefore, it is absolutely inadvisable to tolerate the presence of the
cited obstacles within the protection sections.
Figure 6
It is possible to tolerate the presence of these elements near the protection sections only if their
growth is limited through routine maintenance, and if their movement is stopped through
containment barriers. Various
Obstacles
might be present along the protection sections. For
them there is the need to make the same considerations and take the same necessary
precautions adopted for the above cases. These create
dead zones
not protected and
hypersensitive zones
which, cause false alarm.
Содержание ERMUSA 30
Страница 43: ...NOTE...
