heads. Certain multi-head camera settings can be set globally for all of the heads on the All Heads
tab, while other settings should be set for each individual head, using the Head 1 to Head 4 tabs.
When configuring an H4 Multisensor or H5A Dualhead camera, be sure to check that you have
configured both the global and the individual head settings.
To set the options for tampering:
1. In the
Sensitivity
field, enter a number between 1 and 10 to define how sensitive the camera is to a
sudden change in the scene. The higher the setting, the more sensitive the camera is to detect scene
changes.
Note:
A sudden change in the scene is usually caused by someone unexpectedly moving
the camera. Lower the setting if small changes in the scene, like moving shadows, trigger
too many tampering events. If the camera is installed indoors and the scene is unlikely to
change, you can increase this setting to capture more unusual events.
2. In the
Trigger Delay
field, enter the number of seconds (up to 30 seconds) that the tamper condition
must persist in the scene before the tamper event is sent.
Tamper Detection Switch
Cameras with a tamper detection switch can detect attempts to dismount the device. When the tamper
detection switch is activated, an event notification is forwarded to the ACC system and alarms can be
triggered to alert operators.
In addition, if the Video Intercom camera is connected to the optional Safety Relay (H4VI-AC-RELY1), the
event triggers the Safety Relay to go into its lock-out state. In this state, the Safety Relay persists in a lockout
mode and keeps the door securely locked, only permitting exiting from the secure side. After a lockout, the
clear button on the Safety Relay must be pressed to restore normal operation. For more information about
the Safety Relay, see the
Safety Relay Installation Guide
.
If the ACC system is integrated with the Avigilon Access Control Manager (ACM) software, the event is
forwarded to the ACM™ software and processed according to its configuration.
In the Tamper Detection Switch sub section, you can view the tamper switch status and configure the Safety
Relay behavior.
1. The Status field reports the state of the tamper detection switch:
l
No Tamper
: The tamper detection switch is in its normal operating state.
l
Tamper Detected
: The tamper detection switch has been activated (or the camera is not
properly installed). If the camera is connected to a Safety Relay, lockout mode is activated,
keeping the door securely locked, only permitting exiting from the secure side.
l
Disabled
: Tamper detection switch is not enabled on the camera.
Tamper Detection Switch
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