Hard-wired home-security systems can be expensive to install, and they often require monthly monitoring fees. If you're interested in a home-security unit but don't want to spend a lot of money, you can install a dependable wireless unit. Wireless home-security systems come in a kit that includes a main module (figure A), a siren (figure B), door/window transmitters (figure C) and motion sensors. Some units also include a key-ring transmitter for arming and disarming the unit (figure D).
Materials:
Micro screwdriver
Drill with appropriate-size drill bit and Phillips driver bit
Wire strippers
- Position the door/window transmitter on the entry doorframe (figure E) so that the face of the transmitter is flush with the inside edge of the doorframe. Attach the magnetic trigger to the door so that it is no more than 1/4" from the transmitter when the door is closed. The transmitters use magnetic sensors and may include LED indicators to show whether the magnets are positioned properly. Remove the backing from the double-sided tape, and attach the transmitter to the door and frame. For glass doors, use a glass-break sensor (figure F), which detects vibrations when glass is broken or cut. Some systems require screws for mounting.
- Mount the alarm close to the door. Some alarms include a jack designed to operate an external siren (figure G).
- Set the arm/disarm codes based on the manufacturer's instructions. On some units you'll have to open the main transmitter and adjust the switches with a pen (figure H).
- Determine an appropriate location for the main module near an outlet and away from any appliances or fixtures that could block the radio frequency of the unit (such as radios, televisions, microwave ovens or large metal objects). Mount the unit according to the manufacturer's instructions.
- Install motion detectors in the area that is most likely to be entered. Make sure the motion detectors aren't near any objects that could interfere with radio transmission.
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