Sensitivity:
The Sensitivity setting is
controlled by a slider, allowing you to set a
value between 0 and 50. The lower the
number, the more sensitive the motion
detection will be.
There are
four time periods
which you can
define different motion sensitivity values for.
You can change each period starts and ends to
best match the changing lighting conditions in
your location.
values between 5 - 10 will give good results in
the daytime.
At night, you may get numerous false triggers
unless you raise the sensitivity setting,
perhaps as high as 25 - 30. This is because
when cameras use active infrared night vision, they dramatically increase the gain controls to the image sensor. This
creates a level of “noise” in the camera’s images, which are interpreted by the NVR as motion.
By default, the day is divided into four periods:
00:00 (Midnight) - 06:00 (6:00 AM)
06:00 (6:00 AM) - 12:00 (Midday)
12:00 (Midday) - 18:00 (6:00 PM)
18:00 (6:00 PM) - 00:00 (Midnight)
You might need to shift the beginning and ends times to best suit the lighting changes at your location.
The start and end times can be set to anything you like, provided the different time periods don’t overlap and there’s no
gap between one ending and the next starting.
There’s no requirement for all four time periods to have different sensitivity levels, although we suggest that usually gives
the best performance.
To find the best sensitivity values for different times of day/ night, it’s best to test the system during different time periods.
Get an able-bodied volunteer to move about in front of the cameras you’d like to tune the sensitivity for. The ideal
sensitivity level is when your volunteer moving about always triggers the motion detection, but there are no false triggers
(or very few) when your volunteer isn’t moving about.
False Triggers
Setting the motion detection at high sensitivity levels (4 or lower) increases the frequency of false alarms. On the other hand, low
sensitivity levels (20 or higher) increase the risk that a significant motion event (such as an intruder) will not trigger the motion detection to
record.
Check the Motion Detection settings both during the day and at night.
In low-light conditions (or when your cameras are using
infrared night vision) the NVR may be more or less sensitive to motion, depending on your unique circumstances. The difference might be
very dramatic!
Weather
The weather conditions are going to affect your motion detection. Dramatic weather phenomenon such as heavy rain, strong winds,
lightning and so on, may trigger the motion detection with surprising frequency.
On the other hand, things like fog, mist and other obscuring kinds of weather might mask or obscure something moving to the point that
the NVR fails to detect them.
Here are a few steps you can take to minimize the amount of noise in your images.
•
Try adjusting the Image Settings to fine-tune the brightness and contrast to get a more stable image.
•
Limit the motion sensitive area to only the areas in view that a target could be. In particular, large featureless areas in the camera’s
view are the ones most likely to give false triggers - turning off the motion sensitivity to any area a target cannot move in front of will
help reduce false triggers.
Note:
The motion detection feature will seem more sensitive at night, particularly when using low-light or active infrared cameras. We
recommend that you test your motion detection sensitivity both during the day and at night to ensure your sensitivity setting is suitable for
either lighting condition.
Device Setting -> Alarm -> Motion
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