2.3.6 Examples of the field of
vision with vertical sensor
direction (barrier)
NOTICE
: the detection start and end values do not
guarantee detection of a standing person. The
reported values may slightly vary based on the
installation conditions.
Note
: only some heights are reported, but every
intermediate value is allowed and guarantees optimum
performance.
The dimensions of the field of vision expressed in
meters and feet are as follows.
h (m)
α (°)
s
1
(m)
s
2
(m)
s
3
(m)
1
0
0.5
*
20
1.5
0
0.5
20
20
2
-15
2
20
20
2
-30
1
16
16
2.5
-15
2
20
20
2.5
-30
1
20
20
2.5
-45
1
16
18
3
-15
2
20
20
3
-30
1
20
20
3
-45
1
12
15
h (ft)
α (°)
s
1
(ft)
s
2
(ft)
s
3
(ft)
3.2
0
1.6
*
65
4.9
0
1.6
20
65
6.5
-15
6.5
20
65
6.5
-30
3.2
16
52
8.2
-15
6.5
20
65
8.2
-30
3.2
20
65
8.2
-45
3.2
16
59
10
-15
6.5
20
65
10
-30
3.2
20
65
10
-45
3.2
12
49
Note
*: discernment of animals is not guaranteed in the
entire field of vision.
2.3.7 Alarm and pre-alarm areas
Within the sensor field of vision, the alarm and
possible pre-alarm areas define the area that is
actually monitored by the sensor. If a pre-alarm
area is not defined, the alarm area corresponds to
the entire monitored area.
Motion in the alarm area triggers an alarm, motion
in the pre-alarm area triggers a pre-alarm.
Note
: not all motions occurring in the pre-alarm or
alarm area are signaled. It depends on the level of
tolerance set for animals and possible semi-static
objects.
For outdoor installations, the pre-alarm area is
especially useful for implemented security
operations (e.g.: turning on the lights, activating a
surveillance video camera) in the presence of
motion in the marginal areas of the monitored
area.
The configuration of the pre-alarm area in barrier
installations is usually not very useful, except for
safeguarding in hallways, where the pre-alarm
area could be useful for detecting the presence of
an intruder in the area that is farthest from the
sensor.
2.4 Interferences
2.4.1 Introduction
The MSK-101-POE sensor is different from other
traditional motion sensors. It is important to know
what factors interfere in its correct functioning, to
properly install, configure it, and to obtain
optimum performance.
2.4.2 Warnings relative to
precipitation
l
Unusually intense rain (heavy storms with
intensities exceeding 20 mm/h (0.80 in/h)) can
reduce the field of vision by up to 50%.
l
Hail may cause false alarms.
2. Useful information for design
MSK-101-POE | Advanced configuration manual v1.1 DEC 2019 | msk-101-poe_advanced-config_en_wo v1.1 | © 2019 Inxpect SpA
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