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Chapter 4: Maintenance
FlexZone™ Product Guide
83
4. Snow removal (as required)
If the weather conditions at your site include snow falls, the fence should be kept
clear of accumulating snow. If snow accumulates against and around the fence, it
will absorb and dampen the vibrations caused by an intrusion attempt. In
addition, if there is significant snow accumulation, the snow can serve as a
bridging or tunneling aid to defeat the sensor.
Preventing weather related nuisance alarms
Note:
For network based systems, after completing the initial calibration it is
recommended running a magnitude response plot through the Network Manager
during the first periods of inclement weather. If the weather causes an
unacceptable number of nuisance alarms, you can adjust the cable Threshold to
exclude the effects of the weather. For standalone systems that encounter an
unacceptable number of nuisance alarms during inclement weather, adjust the
cable Threshold to exclude the effects of the weather. After adjusting the cable
Threshold, retest the system to ensure that the sens
or’s detection meets your
security requirements.
If your FlexZone system is having a problem with nuisance alarms during
inclement weather, inspect the fence to ensure it is in good condition and there
are no loose fittings that can cause metal on metal contact. Next, connect the
UCM to the processor and review the clutter and the alarm history to try to
determine the source of the nuisance alarms.
Using the SD card function
The FlexZone processor includes a microSD card slot to enable long term
recording o
f the sensor’s activity. The SD recording can be activated by a
hardware button on the processor or by a software control on the UCM SD Card
tab. For details on the SD card operation and function refer to the UCM online
help files.
Note:
To review the recorded plot data on the SD card, connect the SD card to
the PC, start the UCM (work offline) and import the plot file(s) from the SD card.
Testing the fence condition
To determine if there are any loose fittings or parts of the fence that can cause
nuisance alarms in windy weather, grip a fence panel in the middle and gently
push and pull on the fence with an increasing motion. Run a UCM magnitude
response plot to record the tests, and listen for any metal on metal contact. When
you review the plot, look for any response spikes that are over the threshold. If
the shake test causes metal on metal contact, or generates response spikes over
the threshold, locate and correct the problems on the fence. This will help to
prevent weather related nuisance alarms.
Ground faults
If excessive noise is present, or becomes evident after installation, check the
system ground connection (processor, or power supply) and examine the sensor
Summary of Contents for FlexZone Series
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