Lorex LW2750 Series, User Manual

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Recording 10
3. Press again to stop recording on the channel you are currently viewing. The new
recording icon ( ) will appear on the LCD receiver indicating a new file is on the
SD card.
CAUTION
Do not remove the SD card while the system is recording. Disable all recording on the system before
ejecting the SD card.
10.4 Motion Recording
Use motion recording to have the system record only when motion is detected by one of
the cameras. Video is recorded from any connected camera that detects motion. The sys-
tem supports 5 second pre-recording, meaning that the system will record 5 seconds of
video before a motion event. This allows you to see the entire event instead of starting
when motion detection is triggered.
The system detects motion in two ways. The cameras have a built-in Passive InfraRed
(PIR) sensor that tracks heat from body movements to detect movement up to a maximum
range of 21 feet (6.5 meters). PIR motion detection is extremely accurate at detecting
movements from people and animals, but the accuracy decreases in extremely hot envi-
ronments approaching or exceeding human body temperature (98.6°F / 37°C).
PIR Motion Detection
A camera detects body heat movements, and triggers the system to record.
The system also uses video motion detection, which looks for changes in video images
(frames) to detect motion. Video motion detection allows for motion detection beyond the
range of the PIR sensors and in extreme temperatures. Video motion detection is highly
accurate, but may trigger recording from changes in light or moving trees, leaves, etc. You
can set the sensitivity of video motion detection depending on your preferences. See
10.4.3
Configuring Video Motion Detection , page 27
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