Microwave barrier
- 10 -
MOUNTING THE DETECTOR
In terms of its physical configuration, the final assembled detector is comprised of two oppositely-
placed separate units – the transmitter unit and receiver unit – which are identical in size and
appearance. To perform proper physical orientation of the units, it is necessary first to loosen their
fixing nuts, and then to tighten them after final adjustment. Firm attachment of the units on
recommended round supporting posts is done with the aid of the mounting hardware. The
recommended diameter of the posts is 2-3½ in. (5.1-8.9 cm). It is recommended to bury the
connecting cables in the ground.
On existing soft ground or ground susceptible to periodic softness, the posts must be placed in
foundations. The type and dimensions of the foundations should be determined in view of the
type of soil and characteristic weather conditions at the site, in order to establish and maintain
firm and steady support of the units during installation, adjustment and actual operation.
In areas with little snow, the section of the posts remaining above the ground should be at least
3.61 ft. (1.1 m) high. In places where the height of the snow cover may exceed 1.64 ft. (0.5 m), the
section of the posts remaining above the ground should be at least 4.92 ft. (1.5 m) high.
The installation of the units must allow free access to their adjustment controls and fastening
elements. They must remain accessible for special maintenance needs as well as for routine
seasonal adjustments. The initial height at which the units should be positioned before further
adjustment is 2.62 ft. (0.8 m), measured from the ground surface to the center of the unit. The
brackets should be positioned on the posts so that the emission of the transmitter unit is directed
toward the receiver unit.
Each unit must be fastened to its respective post with the help of two collars (where posts of
asbestos cement are used, it is necessary to replace the supplied collars).
