23
Triggering the detector when
set to “most sensitive”
Figure 8 – most
sensitive trigger
In
figure 8
, a body moving from position 1 to position
2, into the infrared beam zone, will create a pulse.
Moving from position 2 to 3, out of the other side of
the same infrared beam zone, will create another
pulse. If the detector is set to “most sensitive” and the
body moves from position 1 to position 3 within 10
seconds then the detector will have received 2 pulses
in 10 seconds. This means the detector will have
made a valid movement detection and will trigger,
indicated by the red light (only if in test mode or
normal mode but not in IPS mode). This also applies
if the body moves in the opposite direction.
No trigger body movements
Figure 9 – no trigger
No trigger body movements are body movements
which are too small to be recognized as valid body
movements to trigger the detector.
In the example, shown by
figure 9
, a body walking
into one side of the infrared beam zone, then back
out the same side of the infrared beam zone will not
trigger the detector. A body moving from position 1 to
2, into the infrared beam zone, will only create
pulsing. A body moving from position 2 back to
position 1 or from position 2 to position 3 (out of the
same side of the infrared beam zone) may create
further pulses but will not trigger the detector. This
also applies if the body is moving in and out of the
infrared beam zone from the other side.
The Tamper Switch
The tamper switch will open whenever the front cover of
the detector is removed. A tamper signal is
automatically transmitted as well as a normal trigger
signal. Each time this occurs the detector will also
automatically enter test mode.
Tamper switch
