In stal la tion
HESA ad vises to make an in spection of the site to pro-
tect con si de ring the fol lowing ele ments:
Width pat tern of de tection area
The width of the beam va ries depending on the distan-
ce between the receiver and the transmitter and the
sen si ti vity le vel used. The fol lowing dia gram (Figu re 2)
allows you to de termine the ma ximum width of the
beam that is at half of the di stance of the bar rier.
Mount ing height
The mo unting height from the ground of the bar rier de -
pends on the in stal la tion re qui re ments but espe cial ly
must be de ter mi ned con si de ring that the in crea se of
the height in creases also the the length of the un cove-
red area that is the area to the ground not co vered by
the beam of the barrier. This in formation is im portant
also for de termining the overlapping of two bar riers
that are crossing or that are in stalled in pa rallel. Plea -
se note that the un covered area in creases by decrea-
sing the sensitivity (see Figu re 4).
Typically the height should be of 85 cm.
The
height is betwe en ground and the middle of the devi-
ce.
For se curity purposes we advise to overlap the ends of
the bar riers in or der to eli mi na te the un co ve red areas.
Con si de ring an avera ge sen si ti vity and a mo un ting
height of 85 cm, you should over lap for about 5,5 m
in the cor ners and for about 11 m on the rec tilinear
pro tec tions. In case the re are con se cu ti ve bar riers, the
distance between the centers should be of about 50
cm (see Figure 3).
Model HE400 mi cro wa ve barrier
DT01142 - Page 2
DOCU MEN TAZI ONE TEC NICA
TECH NI CAL DOCU MEN TA TION
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Lunghezza della barriera (m)
Diametro
a
m
età
tratta
(m)
Fig.2: Diameter of the sensitive zone
Distance betwe en TX and RX (m)