Replacing The Battery - KERUI KR-K7 User Manual

Installation and Usage of Sensors
18.1 Installation and Use of Door Sensor
Door sensor makes use of magnetic induction to detect close and open state, and consists of a
transmitter (A) and a magnet (B). It can be installed on doors, windows or any object that can be
closed and opened. When the transmitter is separated from the magnetic, the transmitter will send an
alarm signal to the alarm panel, and host begins alarm siren.
The magnet (B) should be installed on the movable part of the door or window. Firstly, clean the
corresponding position, and take out wireless door sensor, then put on the double faced adhesive in
the bottom. The installation should note the items below:
The transmitter (A) (transmitter) and part B (magnet) should be installed on the fixed part (frame) of
the door or window. Make sure that:
1. A and B should be in the same vertical line
2. The arrows on the side of both units are pointed to each other.
3. The distance between A and B should not be less that 2mm and not be greater than 1 cm.
After the installation, the indicator light flashes for 1 second as the door opens, meaning the door
sensor is installed successfully. If the indicator light does not lit for one second or is constant lit
suggests a lack of power. The installation can also be reinforced by screws by removing the bottom
cover, then screw the bottom and buckle the cover to the bottom.
Make sure not to break the black tamper switch lever.

18.2 Replacing the battery

When you receive low battery warnings (by SMS) the battery needs to be replaced.
First remove the sensor from the zone on the host, in order to prevent the tamper switch from
activating the alarm. Remove the cover gently from the sensor by placing a flat screw driver into the
hole on the short edge of the sensor. Lift the cover a little and pull it straight from its mount in order to
prevent the black tamper switch lever from breaking. Install the new battery and buckle the cover (the
arrows on the side of both units should pointed to each other) to the bottom in a straight way until it
clicks in place. Add the sensor to the zone on the host and check its operation.
KR-K7 User manual
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