VCS VideoJet 1000, Manual

Page: 66 / 106

Configuration with web browser
68
VideoJet 1000
The sensitivity of the video sensor can be adjusted, so that an alarm
is generated only if a given threshold is exceeded.
In order for the alarm to operate, the following conditions must be
fulfilled:
z
The motion detection must be activated.
z
At least one cell must be activated.
z
Individual parameters must be matched to the environmental
conditions and to the required responses.
z
The sensitivity must be set to a value >0.
Motion detector
Select here the option On to activate the video sensor.
Select sensor field
The areas of the image to be monitored by the video sensor are
selected here. The video frame is subdivided into 396 quadratic
cells. Each of these cells can be activated or deactivated. If it is
necessary to exclude particular regions of the camera field of view
from the monitoring process because of, say, continuous move-
ment (e.g. due tree movement in a wind), the relevant cells can be
deactivated.
Warning!
Light reflections (e.g. in glass facades), switching on or off of flood-
lights or light level changes caused by cloud movement in bright
daylight can cause undesirable responses from the video sensor
and thereby generate false alarms. Carry out a number of tests for
different day and night time conditions in order to ensure correct
operation of the video sensor.
For surveillance of indoor areas, ensure a constant lighting of the
areas during the day and at night.
Uniform surfaces without contrast can trigger false alarms even
with uniform lighting.