
Do’s and Don’ts a planning primer
MPS-4100 product guide • • • a - 5
•
DO use bistatic microwave sensors in areas where the ground is smooth
and flat.
•
DON’T use bistatic microwave sensors over drainage ditches, hills, or
ungraded areas where there is more than a 15 cm (6 in.) change in terrain
over the full length of the zone. Microwave detection is not terrain-
following (see Figure a-7).
•
DO use bistatic microwave sensors in areas that are free of extraneous
motion.
•
DON’T use bistatic microwave sensors in areas with trees, shrubs or
vegetation in, or near, the detection zone. Vegetation within the detection
zone will cause nuisance alarms.
•
DO eliminate all puddles and areas of standing water inside the detection
zone.
•
DON’T use bistatic microwave sensors near large areas of water, such as
ponds, streams, drainage ditches and water runoff areas.
•
DO use bistatic microwave sensors in areas that are fenced-in.
•
DON’T use bistatic microwave sensors in unfenced/ uncontrolled areas
because of potential problems with animal-initiated nuisance alarms.
•
Do limit the length of the microwave zone to exclude fences, buildings
and other reflective surfaces from inside the detection area. Use
additional overlapping and offset microwave units to provide complete
coverage of the area.
•
Don’t allow fences, buildings or other reflective objects into the
microwave zone or nuisance alarms and inconsistent detection will
result.
•
DO mount microwave units at least 3 m (10 ft.) inside the fence line for
short zones. For longer zones, follow the guidelines for unit separation.
•
DON’T mount the microwave unit too close to the fence to protect
against bridging attempts, and to avoid nuisance alarms caused by fence
movement.
•
DO keep microwave units away from traffic areas, and DO provide
protective devices to prevent damage.
•
DON’T mount microwave units near fence gates that can swing into the
heads.
•
DO use microwave offsets and corner overlaps to provide complete
coverage of an area, including the transmitter and receiver mounting
locations.
•
DON’T leave vulnerable areas at the transmitter and receiver mounting
locations.
Figure a-7 Do’s and Don’ts of installation terrain
DO
DON'T
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