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Reasons for false alarms or false negatives in supermarket eas alarm system

Views:3     Author:Allen     Publish Time: 2018-08-28      Origin:Site

Reasons for false alarms or false negatives in supermarket eas alarm system


Installing supermarket eas alarm system at the entrance and exit of the supermarket to prevent theft has become a trend in the supermarket industry to prevent the loss of items, but even the best equipment is faulty. For the supermarket eas system at work, False positives and false negatives are common occurrences. There are many reasons for this, we have to analyze one by one and find the key to the failure of the supermarket alarm.


First, we must understand the concept of false alarms and false negatives in supermarket eas system.


False positive: It is also called the system self-sounding. In the environment where the anti-theft eas tag signal without the system allowed frequency passes through the working range environment of the device, the system emits an audible and visual alarm.


Missing report: refers to the situation that when the system allows the anti-theft tag signal of the frequency to pass through the working range environment of the device, the system does not work, that is, the report is missing.


Analysis of the possible reasons for false alarms and false negatives in supermarket anti-theft eas system


1. On-site environmental noise interference


Check whether there are high-power appliances or motors near the equipment, large-area metal, etc. Because the supermarket security eas system is under the electromagnetic field interference, the system will have false positives or false negatives.


2. Sensitivity is too high or too low


The noise is strong to reduce the sensitivity, the anti-theft eas tag is not detected to increase the sensitivity, and the environmental noise interference is the invisible magnetic field, so the maintenance adjustment should be performed according to the site environment.


3, supermarket security door access control loosening caused by false positives.


4, the eas main board is aging or broken. With the aging of electronic components, the main board is usually changed about 3 to 10 years.


5, due to anti-theft eas tag (magnetic strip) degaussing is not clean caused by false positives.


6. Check if the non-alarm range is in the blind zone of the device itself.


7. The alarm is damaged and the transmitting antenna is broken down.


In daily work, whether it is the false alarm of the supermarket anti-theft device or the misreporting of the supermarket anti-theft eas system, it is a relatively embarrassing thing, which will make our work in a dilemma. These are the supermarkets summarized above. The reason for the false alarm and false negative of the anti-theft device seems to be simple, but it is still difficult for novice. Here, we suggest that our business owners must choose to have after-sales protection when purchasing supermarket anti-theft eas system. If there is a problem with the equipment, they can contact the after-sales personnel for on-site service.


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