Dahua NVR21-4KS3 Series User Manual page 343

Step 2 Select a channel and then click
Step 3 Configure the detection region.
1) Click Setting next to Region.
2) Point to the middle top of the page.
3) Select one region, for example, click
4) Drag on the screen to select the region that you want to detect.
5) Configure the parameters.
Parameter
Name
Sensitivity
Threshold
Figure 5-213 PIR
to enable the function.
Table 5-57 Detection region parameters
Description
Enter a name for the region.
Every region of every channel has an individual sensitivity value.
The bigger the value is, the easier to trigger an alarm.
Adjust the threshold for motion detection. Every region of every channel
has an individual threshold.
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User's Manual