Bosch NWD-455V03-20P Operating Instructions - Page 77

FlexiDome IP Configuration via the browser | en 77 7.12.5 i 7. Click the close button (X) in the window title bar to close the window without saving the changes. Tamper detection You can detect the tampering of cameras and video cables by means of various options. Run a series of tests at different times of the day and night to ensure that the video sensor is operating as intended. Sensitivity NOTICE! This and the following parameter are only accessible if the reference check is activated. 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. Trigger delay You can set delayed alarm triggering. 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 allows you to avoid false alarms triggered by short-term changes, for example cleaning activities in the direct field of vision of the camera. Scene too bright 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. Scene too dark Activate this function if tampering associated with covering the objective (for instance, by spraying paint on it) should trigger Bosch Security Systems Operating Instructions V 1.0 | 2006.12