Processor calibration
FlexZone Product Guide
Page 81
Setting individual cable segment thresholds
In addition to the threshold for the full length of cable, you can also set independent thresholds for
the defined cable segments. Cable segment thresholds are used for any high risk, or low threat,
areas, as well as any areas that may be subject to a higher NAR such as an open stretch of
fencing that is exposed to strong winds. Lowering the threshold in high risk areas will increase the
Pd in that area. However, a lower threshold can also lead to an increased nuisance alarm rate. For
an area where the threat is considered low, you can raise the threshold, which will reduce the
chances of nuisance alarms occurring, while still providing an acceptable Pd.
illustrates a cable, which has been split into 5 segments and 3 zones. The first segment
is non-detecting cable at the processor location. The fifth segment is past the end point of
detecting cable. Segments 1 and 3 (Zones 1 and 3) use the globally set threshold of 6 dB below
the profile. Segment 2 (Zone 2) is a high threat area and the threshold has been lowered to 12 dB
below the profile.
Setting the segment threshold
1. Select the defined segment to which you will apply a cable segment Threshold.
2. Use the Threshold (dB)
spin control to set the Threshold for the selected segment.
3. If required, repeat this procedure to set a cable segment Threshold for other segments (or
Zones) as specified in the site plan.
4. Repeat this procedure for the B side sensor cable.
5. Save the UCM file and download the configuration data to the processor.
Intrusion simulations
To test the FlexZone sensor you conduct simulations for both cut and climb intrusions. The easiest
method for simulating a cut intrusion is to tap the fence with the blade of a medium sized
screwdriver. Hold the screwdriver by the handle, and flip your wrist to bring the blade into contact
with the fence. The metal on metal contact generates an impulse that is similar to the cutting of a
fence wire.
Figure 88: Setting individual cable segment Thresholds
1
2
globally set Threshold
high security Zone 2
(12 dB below profile)
independent Threshold for
(6 dB below profile)