What should I do if the supermarket anti-theft system does not call the police?

When you go shopping, you will see that supermarket security doors are installed at the exits of supermarkets. If a customer takes out the goods without paying, the security system will sound an alarm. Merchants who have used the anti-theft system also know that the anti-theft and anti-theft system sometimes cannot alarm normally. There are some suggestions for you.
     One: avoid the interference of the surrounding environment
     When installing the anti-theft door of the supermarket, it is necessary to detect whether there is a strong radio interference signal around the antenna. If there is an anti-theft door, it may ring continuously or stop working.
     Two: Check the working condition of the power supply
     When the above situation occurs, first check whether the system power supply is working normally, and prohibit other power-consuming equipment on the same line. The voltage of the power supply must be stable, otherwise the system will not work properly.
     Three: anti-theft motherboard aging
     Check whether the plugs and jumpers on the motherboard are loose or fall off, and then replace the power supply and motherboard to check if there is no problem.
     Four: Whether the wage frequency of the anti-theft label is consistent with that of the anti-theft device

     The anti-theft tag has two working frequencies of 8.2MHZ and 58KHZ, and the appropriate tag should be used according to the detection frequency of the anti-theft door.