Learn how to set a home security system, including motion detectors and magnetic contact detectors.
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Once position has been decided, securing a PIR in place is a straightforward task. For hard-wired systems, cable connection and routing becomes necessary, but for a wireless alarm, secure positioning and correct battery insertion is all that is required.
Remove the front cover of the PIR (Image 1). You may need to undo a small grub screw in order to release the cover.
Some PIRs need to be set internally. This involves setting dip switches inside the PIR (Image 2).
Insert the battery and replace the front cover (Image 3).
Hold the base plate in position and mark pilot holes (Image 4). Plug if necessary before securing in place.
Replace front cover. In the example shown here, a screw needs to be tightened on the underside of the PIR (Image 5).
The detector should be located on the fixed frame and the magnet on the door or opening light of the window. With the wireless example shown here, batteries must be inserted in the detector before it is installed. Many contact detector kits are convertible in that they can be installed wired or wireless. The alignment and distance between the detector and contact is crucial, so the manufacturer's guidelines need to be closely followed.
Insert battery into the main body of the detector (Image 1), then secure both detector and magnet in place on the door or window edge, ensuring that they are correctly aligned (Image 2).
These systems are becoming a more viable DIY installation task. Systems may either be linked to a separate monitor, or directly to your TV and be connected to a video recorder. The majority of systems use PIR sensors, and wireless options are available. When the PIR senses a movement, the camera transmits the image to a receiver unit that is connected via a cable to the monitor or TV. This automatic system can be bypassed by using the remote control. Follow the system manufacturer's instructions to plan and install a CCTV system.
Excerpted from Do It Yourself Home Improvement
© Dorling Kindersley Limited 2009