49
INSTALLATION AND OPERATION INSTRUCTIONS — FENCE PROTECTION SYSTEMS
Dual Zone Pre-Amp Tests
Following the FPS-3 Central Controller tests proceed to the field to test each dual zone pre-amp as
follows:
Visually inspect the entire length of the transducer cable to verify proper installation, free from
abrasions or breaks in the outside jacket. Pay particular attention to the following:
•
Where the cable crosses each post.
•
Service loops every 40-50 feet (every 100 feet with Helisensor).
•
Special conditions at corner posts and ends of zones.
•
The installation of each TSK.
•
Dow 4 Compound in each TSK.
•
Drip loops provided at each TSK, EOL, condulet and dual zone pre-amp.
NOTE:
These tests must be conducted using the FPS-3 Field Performance Analyzer
(FPA). There are no adjustments or settings at the dual zone pre-amp.
Open the front door of the dual zone pre-amp. Note that this will set off a tamper alarm at
central control.
Remove the five-position output terminal strip, TB3, by unplugging it from the circuit board.
Plug-in the identical five-pin terminal strip from the FPA. The FPA provides a local alarm panel
and allows you to test and adjust these two zones. Operate the FPA in accordance with the FPA
instruction manual.
Unplug each sensor cable and test with an ohmmeter for leakage between conductors and
leakage to ground.
•
With the end-of-line termination installed, the center conductor to shield resistance should
be 1 megohm
±
10 %.
•
The resistance from shield to ground (i.e., fence, conduit, helisensor covering, etc.) should
be 10 megohms minimum.
If either of these measurements are not within the specified limits refer to the Troubleshooting
section.
Determine the sensitivity and count adjustments by performing tests on fence panels in each
zone. Use the form located at the end of this section, Table 2, to record the gain and count
settings for each alarm zone. This information will be used later to make final adjustments at the
FPS-3 Central Controller and the MX-5300.
Determining the best sensitivity and count settings.
•
Begin testing with an initial sensitivity (gain) setting of 4 and an initial count setting of 4.
These settings should provide excellent fence protection operation in most installations.
•
Sensitivity should be determined by tapping on the fence fabric with a metal object, such
as a screwdriver, and by actual climb tests.
•
Generally speaking, increasing the gain in the zone increases the possibility of nuisance
alarms. As the gain is increased, the fence is more susceptible to producing alarm counts
from movement, wind, etc. Increasing the count in the zone decreases the possibility of
nuisance alarms by requiring more qualifying hits (hits that exceed the gain threshold) to
produce an alarm.
