OUTDOOR USE
The detecting units MUST be adjusted in order to have beams facing
downward to the ground level or parallel to the ground, but NEVER upward.
This is to avoid situations of blinding by sunlight during the day and to prevent
the not-correct working of the sensor.
The two detecting units MUST be adjusted on the vertical axis in order to the
two beams pattern slight divergent: the upper unit see the most distant area,
the lower one see the nearer area. In this way, using the AND logic, an alrm is
triggered only when a human intruder crosses both the beams. The alarm is
not triggered when only one beam is crossed for example by an animal or
objects that you do not want to be considered intruders.
Fig. 2 - AND logic mode: the human trigger alarm, the dog doesn’t.
The function of "directional AND" allows to further refine the way in which an
alarm is triggered. This mode make the sensor to trigger an alarm only after a
sequence of detection that starts with the upper head (farther beams) and end,
within the AND period, with the lower head (closest beams).
This feature allows to give a directionality to the detection, that means the
sensor is able to identify an intruder approaching the protected zone, avoiding
alarms for people who, even if moving inside the detection zone of the upper
head, are not approaching the protected zone.
