Dahua NVR5208-EI User Manual page 315

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Custom : You can customize the number of people who have reached crowding as
need.
You can configure the alarm level and the number of people.
2. Configure parameters.
Parameters
Sensitivity
Min Duration
Repeat Alarm Time
If the alarm is triggered for less than the set minimum duration, the alarm cannot be
established.
under Trigger to configure alarm schedule and linkage. For details on alarm
Step 6
Click
linkage, see Table 5-50 .
Click Apply.
Step 7
Figure 5-183 Custom
Table 5-49 Parameters description
Description
The default is 5. The higher the sensitivity, the more sensitive the
detection will be.
Although there are more targets captured in the same scene, false
detections occur.
Set the minimum time for the crowding in the detection area until
an alarm is triggered.
Set the repeat alarm time.
If the alarm state persists, when reaching the repeat alarm time, the
alarm is triggered again.
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