Installation recommendations
FP400 Product Guide
Page 23
Cable handling recommendations
•
Bend management systems should be used to restrict cable bend during installation so that
the minimum bend radius is not violated. (Cable pulleys of a suitable diameter should be used
at points where the cable changes directions during installation.)
•
Fused swivels and tension controlled hauling winches should be used to ensure the cable is
installed at a tension that does not exceed the specified limits.
•
Cable spools should be positioned to limit cable bending and minimize the angle of cable pay-
off during unwinding/hauling.
•
Cable spools should be held firmly in the pay-off stands to ensure smooth rotation and prevent
vibrations that may damage the drum and/or the sensor cable.
Installation recommendations
Sensor fiber length matching
It is critical that the two sensor fibers for each zone are exactly the same length. To meet this
length matching requirement, when the lead-in cable and sensor cable are stripped for splicing to
the start module and end module, ensure that the two sensor fibers are exactly the same length
(i.e., measure carefully and trim if necessary, to match the two fiber’s lengths). In addition, ensure
that the two fiber leads from the start module that are used for the processor connections are also
exactly the same length.
Fence height considerations
The FP400 will provide excellent detection for fences up to 3 m (10 ft.) high with a single pass of
cable. The single cable pass is installed at one-half the fence height unless the fence includes a
middle rail. For fences with a middle rail, the sensor cable should be installed 30 cm (1 ft.) above
the middle rail. For fences greater than 3 m high, use two passes of sensor cable to protect the
fence. Install one pass at 1/3 the fence height and the second pass at 2/3 the fence height.
CAUTION
The two fibers used for each zone must be exactly the same length from
the processor to the end module. If the fibers are not the same length,
optimum detection cannot be achieved.
Note
For instances in which a portion of the fence is covered by a climb-over
deterrent (i.e., razor ribbon/concertina) the fence height should be
based on the uncovered portion of the fence. For example, a 3.7 m
(12 ft.) fence with a 90 cm (3 ft.) coil of concertina wire covering the top
section of the fence should be considered a 2.75 m (9 ft.) fence.
The concertina wire must be securely attached to the fence to prevent
any metal on metal contact resulting from environmental conditions.