Failure analysis of anti-theft devices in supermarkets

Supermarket anti-theft device is a common anti-theft device at the entrance of the city and shopping malls. Sometimes there will be some failures due to various reasons. Many people are not professional technicians, so it is difficult to quickly and effectively troubleshoot and deal with the failure. For the convenience of everyone More quickly check the faults of the city's anti-theft devices, especially sort out the causes of the faults and the measures taken.
Fault 1: The anti-theft device in the supermarket does not alarm:
Reason and troubleshooting:
1. First check whether the supermarket anti-theft device has power, whether the power switch is turned on, and whether the power plug is in poor contact.
2. Use the supermarket anti-theft label to test whether the supermarket anti-theft device is alarming (because sometimes the soft label used for the test may have been decoded; or the soft label is damaged; or the soft label is a metal-packed product. When the above situation occurs City anti-theft device does not alarm).
3. Check whether there are large-scale metal objects in the vicinity of the anti-theft device in the supermarket, such as: storage cabinets, freezers, etc., metal cabinets, etc. Move it away if necessary.
2. False alarms from anti-theft devices in supermarkets:
Reason and troubleshooting:
1. No other electrical equipment is allowed on the power supply line of the supermarket anti-theft device to prevent phase interference from other electrical equipment. At this time, please ask the electrician to check the main gate of the power distribution room to see if the circuit uses other electrical equipment.
2. Check whether there are other high-power electrical equipment within 2 meters around the anti-theft device in the supermarket. (Such as lockers, banknote counters, punch cards, computers, cash registers, freezers, rice cookers, etc., if these devices form a ring coil, they will interfere with the city's anti-theft device)
3. Coil coils are not allowed within 10 meters around the anti-theft antenna in the supermarket, especially the network cable of the POS machine cannot form a circle. For example, the cash register is under maintenance or is not in use. put. (Put it on the hanger and straighten it as much as possible) There are no wiring boards and 380V strong wires in the short distance.
4. The supermarket checkout counter should not be too close to the antenna, as it should be made of metal, otherwise it will cause false alarms.
5. Check whether there are labels on the products adjacent to the anti-theft device in the supermarket. These anti-theft labels will cause interference
6. Do not place the hard tags returned after the cash register is unlocked too close to the anti-theft device, and store the hard tags in a metal box as much as possible.
3. The supermarket decoder does not decode:

Reason and troubleshooting:

1. The power is not turned on, the device is not turned on, and the plug is not plugged in.
2. The power light of the decoder of the anti-theft device in the supermarket is on but the decoder board does not decode: If this phenomenon occurs, it is generally because the connection between the decoder under the cash register and the decoder board is artificially cut off. At this time, it is necessary to ask an electrician to turn off the power and reconnect the wires. .

Supermarket anti-theft devices are electronic products that require relatively high sensitivity, and we also need to choose reliable products when purchasing, and at the same time, we can also do a good job of maintenance during daily use, so that the failure of city anti-theft devices will be much less .