VoiceAlert User Manual
2.5.5 Installation for Reducing False Triggers
Use the horizontal filter to create a more horizontal area of detection. For
example, if you wish to exclude large plants of a certain height directly
underneath the Sensor from triggering the Sensor when blowing in the
wind.
Use the vertical Sensor filter to create a more vertical area of detection.
For example, if you share part of a driveway with your neighbour or if a
portion of the back yard contains a tree that blows in the wind. You can
use the vertical filter to exclude these false trigger areas.
*Note* You must remove branches or other foliage that grow in front of a
sensor over time as these could possibly lead to false triggering. A
schedule of periodic inspections must be implemented to cut away foliage
re-growth.
*Note* Do not mount the Sensor pointing in the direction of a swimming
pool. Sunlight reflecting off the pool’s surface onto the Sensor may cause
false triggers.
2.5.6 Protection from direct sunlight
Direct sunlight onto the Sensor can eventually lead to discoloration of the
Sensor cover. If possible, mount Sensors so they receive slight shading
from direct sunlight. If you have to mount Sensor on a wall that receives
direct sunlight then consider using a DIY, PVC cover to provide some
shading. Make sure you do not cover the lens of the filter.
2.5.7 Use of long-range lens
The long-range lens increases the infrared detection range from 12m to
30m. Be aware that the increased distance narrows the field of detection.
Long range Sensors will be more efficient at detecting objects moving
perpendicularly across the field of detection (left to right or right to left) as
apposed to movement parallel to field of detection (moving toward/away-
from Sensor). They are very useful for monitoring along the length of long
walls or fences where intruders could jump over to gain access to a
property.
2.6 Important Internal Sensor Settings
2.6.1 Setting a re-trigger delay
To extend Sensor battery life you should consider setting the re-trigger
delay dial VR1 (Figure 4) to 30 or more seconds (turn clockwise to
increase delay / anticlockwise to decrease delay). Only do this for Sensors
that you expect will experience high traffic - activation during non-critical
times - (e.g. You may consider setting a delay to prevent continuous
activation of Sensors by your garden employee working in the garden
during the day). A delay of not more than 20 – 30 seconds is
recommended for this type of situation.
If you do not have a gardener or domestic staff on your premises during
the day, you should leave the trigger delay at zero seconds. You will then
be alerted immediately and continuously upon intrusion.
Copyright InFocus Trading 111 cc, 2009
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