Views:3 Author:Allen Publish Time: 2019-10-12 Origin:Site
How to improve the sensitivity of the supermarket eas anti-theft system? [Bohang China]
The power supply line of the supermarket eas anti-theft system can not be mixed with high-power electric appliances. Try to use independent power supply lines; there should be no other similar equipment within 10M around the system installation position; there should be no large-area metal objects within 0.5M of the system installation position; There must be no anti-theft tag within 1M around the installation location; there must be no battery car charging or sharing the same power supply line within 1M around the system installation location.
Since the sensitivity of the supermarket eas anti-theft system is moderate when the system is shipped from the factory, if the electromagnetic field environment is ideal, the sensitivity can be increased appropriately; the adjustment method: using a small screwdriver, the clockwise direction is increased, and the counterclockwise direction is decreased; Check the environment around the system, you can receive the flashing status of the LED signal indicator of the motherboard. In the case of meeting the technical specifications, the signal indicator on the main board does not flash and can be normally alarmed.
However, the more frequent or always bright the signal indicator flashes, it means that there is interference in the field environment; in the electromagnetic field with interference, the sensitivity of the supermarket eas anti-theft system will be reduced by about 30%, then the anti-theft tag will appear. The effect is not good, or very poor, so you can't blindly adjust the potentiometer of the motherboard. If you increase the sensitivity, it will only increase the false positive rate of the system, and it will not improve the effect.