When abrir these last ones, the laminae separate of the magnet and the alarm activates. The volumetric detectors expose the presence of a person by their movement. In order to avoid false alarms, the advanced apparatuses more are able of to differentiate the movements from people and mascots. A third type of sensors warns of the breakage of crystals of a window. The alert sent by these apparatuses gathers a power station of alarms that activates sirens, calls or lights to warn of the intrusion. These switchboards work with connected batteries or to the mains.

If this power station of the system does not take it built-in, it is possible to be located near the door of you enter some elemea a keyboard of control that it activates and desactiventos of the system. These functions also can be exercised with controls at a distance codified. Installing an alarm system Before installing an alarm it is necessary to realise a detailed study from the possible accesses to the house and of the weakest points of this, where a sensor or detector of presence would be due to install. Next, the best location for the box of alarm looks for. This must be in a place where it can be seen and be heard in case of robbery by the inhabitants of the house and the neighbors of the zone.

Placed in an outer wall, it can exert a deterrent capability before a potential intruder. In order to avoid its manipulation by other people’s people, the picture must settle in a high zone of the wall. Once installed the alarm, the sensors in the chosen points are placed and its correct operation tries on. Next, the control unit of the keyboard settles. This device is due to place near the fore door so that, once it has entered the house, it is possible to be acceded to him of fast form. Finally, the picture of alarm to the electrical provision of the house is connected and a complete and exhaustive test of all the alarm system is realised. Upon forecast of possible cuts of electricity, it agrees to count on a emergencia battery. Source of the news: Alarm in house, to be able to live more calm insurances and

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