Wherever there is new construction, it is likely that surveillance systems will be installed. Modern surveillance equipment is relatively inexpensive, reliable and effective for preventing crimes as well as providing visual evidence of a crime. Buildings equipped with external surveillance...
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In Figure 11, a group of cameras are placed at the end of the roof. Although the height is low enough to access using a 12 foot ladder, getting to the cameras is revealed by other cameras placed at the other ends of the building.
This is an area of the building that is always hidden from view but readily accessible. Without these cameras a burglar can take the time necessary to make an entry into the building. After hours these cameras can also be configured to activate alarms when movement occurs.
All exterior cameras should be housed inside camera enclosures. Figure 12 shows a wall-mounted camera enclosure. Accessing the camera will be difficult as it has been mounted in such a way that the top of the enclosure cannot be hinged open. Each time the camera is serviced, the enclosure will have to be radically titled to gain access.
Camera enclosures are relatively inexpensive and take the abuse when taggers and vandals go after buildings.
Camera enclosures are equipped to accept small padlocks. The time it takes to remove the padlock might discourage a burglar or vandal from trying to steal or break a camera.
In Figure 13, the camera enclosure is installed upside-down but this works out fine. The image can either be corrected by reseating the camera inside the enclosure or corrected by the software provided with the DVR. Also, notice the IR LEDS that circle the lens of the camera.
In Figure 14, the upside-down enclosure allows the enclosure shroud to be easily hinged opened, exposing the inner workings.
Enclosures are designed to accommodate different size cameras and camera related components. A groove is mounted into the base of the enclosure to accommodate a standard camera base. The base is slid into the groove and then locked into place with a screw.
Enclosures are weather-proof and air-tight. Where heat is a problem, fans can be installed inside the enclosure. When fans are installed, portholes are drilled into the enclosure to let air in and out.
When cold is a problem, a heating element working in conjunction with a fan can provide necessary warmth for the camera.
Notice in Figure 14 the cabling for both audio and power for IR LEDS. The LEDS are used for low light conditions. When powered up; this camera sends images in almost total darkness.
DVRs can be set to activate the burglar alarm when the cabling attached to a camera is cut or disconnected. Another setting could activate an alarm when the camera is turned away.
Cabling from the DVR to the cameras is a snap to install as cables come in standard uninterrupted lengths. Connecters twist onto camera and plug into the DVR. Excess cable lengths are tucked into ceilings or roof areas.
Shipped in a single box with the camera and lens already mounted in the enclosure, “plug-and-play” packages from a single manufacturer simplify installation as well as the ordering process...
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