Dinion IP - NWC-0495 - Bosch

EN | 72Dinion IP | Installation ManualGlobal change %You can define the percentage of sensor fields that must register a changesimultaneously before generating an alarm. This setting is independent of thesensor fields selected under Select area.This option allows you to detect, independently of motion alarms, manipulationof the orientation or location of a camera resulting from turning the cameramounting bracket, for instance.SensitivityNoteThis and the following parameter are only accessible if the reference checkis activated.The basic sensitivity of the tamper detection can be adjusted for theenvironmental conditions to which the camera is subject.The algorithm reacts to the differences between the reference image and thecurrent video image. The darker the observation area, the higher the value thatmust be selected.Trigger delayYou can set delayed alarm triggering. The alarm is only triggered after a set timeinterval in seconds has elapsed and then only if the triggering condition stillexists. 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 byshort-term changes, for example cleaning activities in the direct field of vision ofthe camera.Scene too brightActivate this function if tampering associated with exposure to extreme light (forinstance, shining a flashlight directly on the objective) should trigger an alarm.The average brightness of the scene provides a basis for recognition.Scene too darkActivate this function if tampering associated with covering the objective (forinstance, by spraying paint on it) should trigger an alarm. The average brightnessof the scene provides a basis for recognition.Bosch Security Systems | 2006-05 | V2.0