Microwave barrier
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SELECTING THE INSTALLATION LOCATION
Attention! The safety and reliability of the operation of the detector depend on the strict
observation of the following requirements.
The presence of wa er due o overflow/spillage/leakage/seepage/e c. from nearby s ruc ures (e.g.,
roofs, e c.) should be avoided in he direc vicini y of he de ec or uni s (in he direc ion of he
emission, no closer han 16.40 f . (5 m); perpendicularly o he direc ion of he emission, no closer
han 0.82 f . (0.25 m)).
The prepara ion and main enance of an exclusion zone, where he presence of bushes and
branches of rees, as well as of big, immovable objec s (e.g., buildings, e c.) – see Comment below
– is no allowed, is necessary. The presence or mo ion of o her movable objec s ( rac ors, people,
animals, e c.) is also no permi ed in he exclusion zone. The recommended wid h of he exclusion
zone for various de ec or segmen leng hs is shown below.
The horizon al dis ance from he de ec ion zone axis o he edge of he exclusion zone mus
be:
-
a leas 3.94 f . (1.2 m) for a segmen wi h a leng h of up o 164 f .
(50 m);
-
a leas 4.92 f . (1.5 m) for a segmen wi h a leng h of from 165-328 f .
(51-100 m);
-
a leas 6.56 f . (2.0 m) for a segmen wi h a leng h of from 329-656 f .
(101-200 m);
-
a leas 8.20 f . (2.5 m) for a segmen wi h a leng h of from 657-984 f .
(201-300 m).
In he exclusion zone, op imally he maximum heigh varia ion be ween bare ground and
ha wi h snow or long grass cover should no exceed 1 f . (0.3 m). No e – modified
effec ive use of he de ec or is s ill possible in condi ions of grea er heigh varia ion, e.g., in
si ua ions where i is conceivable ha an in ruder migh a emp o evade de ec ion by
using higher areas of he snow cover i self for concealmen of approach. In such cases, i
may be necessary o al er he generally recommended heigh of ins alla ion of he de ec or
uni s; however, he Note below should always be given due considera ion.
Comment – Wi hin he exclusion zone, here should be absolu ely no presence of non-radio
ransparen (e.g., s one, me al, ferroconcre e, e c.) na ural or man-made objec s like
boulders, walls, barriers or o her large s a ionary en i ies which migh conceivably produce
signal dis urbances such as noise or reflec ion.
The presence of nearby walkways, bikeways, roadways, railways, e c., fores ed rac s, and large,
immovable objec s and s ruc ures mus be a a dis ance from he de ec or of no less han wice
he wid h of he exclusion zone i self. In he even of subjec ion of he de ec or or immedia ely
adjacen objec s o vibra ion caused by passing raffic, he appropria e dis ance of he de ec or
herefrom mus be de ermined by rial-and-error.
