AVIOTEC 8000i IR System overview | en 23
Bosch Sicherheitssysteme GmbH
User manual
2023.10 | 02 | F.01U.414.168
The smoke detection covers a large area of application. Nevertheless, there might be some
disruptive factors in the operational environment of the customer. Objects with a similar
movement pattern of smoke might cause false alarms, e.g. escalators or conveyor belts.
Large fires with rapidly spreading smoke in the direction of the camera may lead to non-
detections.
Smoke visibility
The smoke must stand out from the background in the camera image.
3.2.3 Tamper detection
Notice!
Settings for Tamper detection are only available in the Configuration Manager and only in
VCA profiles Fire #1 and Fire #2.
There are three possibilities to check the proper function of the camera. In case of
malfunction a trouble will be triggered by the relay output.
The brightness or darkness in the image can be used to check whether a fault is present.
Navigate to VCA > Tamper detection > Scene quality.
Scene too bright
Activate Scene too bright to check whether the camera image is too bright. You can set the
brightness under Threshold. The default value is 215.
Scene too dark
Activate Scene too dark to check whether the camera image is too dark. You can set the
darkness under Threshold. The default value is 40.
Another way to detect a fault is to create a reference image. The settings for this can be
reached under VCA > Tamper detection > Reference image check.
Reference image check
A reference image can be set in order to compare the current camera image with the set
reference image and thus detect troubles.
– Click on Set to store the current video picture as reference image.
– Activate Reference image check.
– Mask areas in the image in which movements are to be expected.
To ensure that the calibration does not output a trouble too quickly, you have the option of
a time delay and fine adjustment.
– Use Trigger delay to define the delay in seconds.
– Fine adjustment is possible under Sensitivity.
For the setting to take effect, click on the floppy disk icon in the left menu bar to save.
In the event of a detected trouble, the relay output is triggered and indicated by a colored
warning triangle.
The following trouble types can be detected by the various settings:
Trouble type Prerequisite (setting activated)
Sensor fault, lens fault Scene quality:
Scene too bright and Scene too dark
or
Reference image check
IR illumination (hardware defect or IR
camera setting)
Scene quality:
Scene too dark
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