Six steps to install anti-theft alarm correctly

How to install anti-theft alarm? Regarding the installation of anti-theft alarms, in the past, everyone thought that as long as they were fixed to the building according to the requirements in the manual, a little visual inspection of the detection orientation and moderate adjustment of the angle would be enough. In fact, the installation process of the anti-theft alarm is a process that needs to be bothered and time-consuming. Now let's talk about the installation method of anti-theft alarm.

Selection of mounting bracket

In the past engineering installation, for the installation of indoor wall-mounted alarm probes, the installation bracket was not selected considering the engineering cost, and even some people completely ignored the importance of the installation bracket, which led to the instability of the entire system Among them, it increases the difficulty of debugging, because the adjustment characteristics of the bracket "universal" can not be obtained, so it is impossible to accurately adjust the probe to prevent the detection area for a long time. So sometimes this purchase cost cannot be omitted. Calculating the labor cost for installation and commissioning and the labor cost for future maintenance, this may far exceed the value of this small component. For an engineering manager, this account can still be calculated.

Of course, sometimes you do n’t need to use this installation accessory, for example: when you install an alarm detector on a 90-degree vertical two-sided wall, you do n’t need to use this installation component, just install it on the wall. Drill a few holes with an electric hammer, and then install the expansion rubber plug, and use the wooden gong ribbon to hold the back plate of the detector into the rubber plug. This installation method can omit a mounting bracket, so for indoor wall-mounted alarm probe installation, it is often necessary for everyone to determine which installation method to use according to their respective installation environment.

Laying of pipelines

In the past engineering practice, you will find that some anti-theft alarm projects have hidden dangers in pipeline construction. The unsafe hidden danger we are talking about here does not refer to the hidden fire danger, but the hidden danger of man-made destruction. In some detector installation locations, we can often see the use of PVC pipe sleeves or bare alarm detection cables. The installation height of the pipeline is not enough and can be reached by human hands, so these can be regarded as hidden dangers of human damage to the system. Some people think this is unimportant, and think that the host part of the entire system may be equipped with anti-vandalism function, and any vandalism system can be detected. But this may greatly affect the working efficiency of the system, or even cause the system to be shut down for repair. At this time, the system maintenance engineer needs to invest more physical and mental energy to carefully find this fault point. If it cannot be found within a short period of time, for some systems, it is impossible for the system user to arm the system within the alert time, because the system will think that the failure has not been eliminated.

In some current projects, PVC pipes or troughs are used as protective devices for anti-theft system pipelines. I think this is obviously wrong. At the same time, for construction or investors, this is also extremely lacking in professional ethics. Compared with galvanized steel pipe, PVC pipe is very easy to be damaged by man-made. Although its cost is low, it is extremely lack of hardness index of galvanized steel pipe. I have been able to see pictures of many foreign engineering companies installing anti-theft alarm probes from certain media. If you study the pictures carefully, you can see that the sheath tube extending from the detector is a metal hose and a special card joint Connect this piece of hose to the detector, the other end of the hose is connected to a fully sealed metal cable box, and the other end of the box is connected to galvanized steel pipe.

Concealedness of pipeline

In the actual installation process, especially for some new buildings. In the design and installation, the concealment of the detector pipeline installation should be fully considered, and the pre-buried should be considered as far as possible when the protective tube can be embedded. This work can be completed by the civil construction unit when pouring concrete in the structure of the building, so as to ensure the concealment of the entire transmission path to the greatest extent. At the same time, it should also be considered that the embedded protective tube can be easily and flexibly connected to the main bridge. For the convenience of using the threader in the future, a small diameter steel is pre-placed in the sheath tube as much as possible cable.

Redundancy of connection cable length

After a probe is installed and fixed, the next step is to strip the cable and connect the probe. At this time, some people often ignore how to accurately calculate the cable length that should be reserved. Connecting cables that are too short can cause difficulty in commissioning the probe. The cables are too short when the angle of the detector needs to be adjusted (excess cables have been cut off). The overly long connecting cable will make it difficult to close the cover of the detector. At this time, the extra cable can only be pulled out of the detector box. But at this time, new problems will occur again, and the extra cables will be exposed to the detector, causing hidden safety hazards. When the above situation occurs, you can detect the target and adjust the azimuth angle after the detector is installed and fixed. At this time, you can determine the approximate required length according to the actual required length, and remove the excess cable to facilitate stripping and connection Wiring base of the probe circuit board.

Connection of tamper switch

When connecting the detector, the tamper switch of the detector should be connected to the entire system as much as possible. The advantage of this is that it enhances the destructiveness of the entire system. In view of the projects that have been implemented or are currently being implemented, there are very few engineers who seriously connect the tamper switch according to the specifications, and often use a four-core cable of RVV4x0.5 to connect the detector. Among them, two cores are used to connect the detector power supply, and the other two cores are used to connect the alarm switch signal. Instead of using the six core cable to connect the switch value and the working power, the remaining two cores are used to connect the tamper switch signal. . If the system does not connect the tamper switch of each detector at this time, for a thief who understands the anti-theft alarm system, he can easily turn on each when the system is in the disarming time period (that is, the non-working time period) Detector and "hand-operated foot", it is conceivable that the safety factor of such a system is very low. Of course, if the tamper switch is connected, it cannot be said that the high-security protection construction has been completed. At this time, the cable connecting the tamper switch should be connected to the 24 hours uninterrupted defense zone terminal of the host, so that it can be guaranteed The front-end probe equipment of the entire system is within the anti-tamper warning time for 24 hours. At this point, you can think about how many anti-theft alarm projects will seriously implement this process, I think such projects will be rare.

Early determination of installation location

Determining the installation location of the detector is also easily overlooked in actual projects. The selection process of the installation location of the anti-theft alarm is different from the determination of the installation location of the camera. If it is not handled properly, the false alarm rate and the false alarm rate will continue to rise, which will affect the performance of the entire system. When the engineering installer finds that the position is not ideal, there are many problems when the installation position of the detector needs to be moved. First of all, the pipeline needs to be moved; if the distance between the pipelines is shortened, it is easier to handle. I am afraid that if you need to add an extension pipeline, you will have to face the problem of cable docking and extension. A junction box, this junction box will also produce a hidden danger point. I think this problem is unwilling to be seen by the owners, so it is very important to carefully determine the location of the detector in advance. Of course, in addition to the above problems, there is another problem that you cannot ignore. That is to easily change the installation location. It will destroy the decoration of the building, for example, you need to move a ceiling detector installed on the decorative surface composed of a whole piece of plywood to another location, which will be regarded as an impossible task.

The installation process of the anti-theft alarm system detector is a complicated process, because its working principle determines the particularity of the installation, and it is often easily overlooked by everyone, and the profit factor of the installation of the CCTV surveillance system camera comes In terms of technology and profits, they are all very different. Therefore, we can more clearly see that in order to design and install the anti-theft alarm system, we must do a good job of planning and designing in advance.