20
Adjusting the sensitivity
Dual Edge Sensing (DES) technology ‘explained’
Figure 4 – side view, detection pattern in optimal temperature
environment
PULSE COUNT SELECT Jumper
ON
Least sensitive – 3 pulse counts
OFF
Most sensitive – 2 pulse counts
The sensitivity of the detector can be changed by
either removing the ‘Pulse Count Select’ jumper or
by placing it across both pins. When the jumper is
placed across both pins (default), then the
detector is set to 3 pulse counts (least sensitive).
When the jumper is removed or only attached to 1
of the pins, then the detector is set to 2 pulse
counts (most sensitive).
Pulse count jumper
Once you have set the jumper, you must press the
tamper switch in for 1 second then release it for
the setting to become active. Now you can place
the front cover back on the detector.
Tamper switch