Bosch FW5.50 User Manual

en | Setting up VCA

Camera Browser Interface

AM18-Q0611 | v5.50 | 2012.03

Software manual

Bosch Security Systems

Sensitivity and Trigger delay [s] can only be changed if 

Reference check is selected.

The basic sensitivity of the tamper detection can be adjusted 

for the environmental conditions to which the camera is 

subject. The algorithm reacts to the differences between the 

reference image and the current video image. The darker the 

observation area, the higher the value that must be selected.

Set delayed alarm triggering here. The alarm is only triggered 

after a set time interval in seconds has elapsed and then only if 

the triggering condition still exists. If the original condition has 

been restored before this time interval elapses, the alarm is not 

triggered. This avoids false alarms triggered by short-term 

changes, for example, cleaning activities in the direct field of 

vision of the camera.

Set how large the global change in the video image must be for 

an alarm to be triggered. This setting is independent of the 

sensor fields selected under Select Area. Set a high value if 

fewer sensor fields need to change to trigger an alarm. With a 

low value, it is necessary for changes to occur simultaneously in 

a large number of sensor fields to trigger an alarm. This option 

allows detection, independently of motion alarms, manipulation 

of the orientation or location of a camera resulting from turning 

the camera mount bracket, for example.

Activate this function if the global change, as set with the 

Global change slide control, should trigger an alarm.

Activate this function if tampering associated with exposure to 

extreme light (for instance, shining a flashlight directly on the 

objective) should trigger an alarm. The average brightness of 

the scene provides a basis for recognition.