1. Focus on checking whether the shell of the metal detector probe is in contact with other metal objects. Under normal conditions, ensure that the detector head is not in contact with other metal objects.
2. The metal detector probe is led out by two groups of shielded wires, namely signal transmitting wire and signal receiving wire. Check whether the wiring terminals in the distribution box are wrongly connected and have poor contact. Special attention should be paid to the loose and falling off wire ends on control IO wiring and power terminals, which will cause misoperation. False alarm phenomenon 2: periodic false alarm of metal detector
At this time, focus on checking whether there are metal pollutants on the conveyor belt. If there are pollutants, periodic alarm will appear when the belt rotates circularly. False alarm phenomenon 3: sometimes the food metal detector gives false alarm, and sometimes it is normal. 1. At this time, the power supply of the detection part of the main board should be checked, and the power supply of the detection part of the metal detector must be powered separately. In addition, please note that part of the power supply for testing cannot share the power supply with the equipment that will produce electromagnetic interference such as frequency converter. We strongly recommend to set aside a separate power supply line to supply power to Jinjian. If necessary, use a separate AC regulated power supply to supply power to the equipment.
2. Check whether there is equipment with strong vibration nearby, resulting in severe shaking of the detector head of the metal detector. If there is such a machine, it must be kept away from the detector until the vibration will not affect the gold inspection. At the same time, it is also necessary to check that the four casters of the metal detector are installed and fixed without rotation, and adjust the supporting foot nuts to ensure that the equipment is horizontal and stable. 3. Check whether there are equipment that will produce strong electromagnetic interference around the metal detector, such as radio, electromagnetic heating furnace, etc. 4. Confirm whether there are strong RF interference sources near the equipment, such as high-power frequency converter equipment. If so, modify the carrier frequency of the frequency converter so that it will not affect the gold detector, or install devices that can effectively suppress interference in the frequency converter.
False alarm phenomenon 4: the metal detector gives a false alarm when the product passes, and it is normal when there is no product. 1. In this case, first check whether the equipment will cause strong jitter when the product passes, resulting in the collision between the product and the probe of the metal detector. If it is necessary to install a current guiding device and buffer device to avoid and reduce the collision as much as possible. 2. Check whether the product produces serious static electricity when passing through the conveyor quickly. If so, corresponding anti-static measures need to be taken.
3. Of course, it is also possible that the product effect of the product is too discrete. What are the precautions for the use of metal detector in food factory? 1. First, check whether there are foreign matters on the machine and whether it is clean. 2. Turn on the power and the machine power indicator will be on. 3. First check the sensitivity of the machine with metal detection iron block. Method: put the detection iron block on the conveyor belt of the machine. When the iron block passes through the machine, it will hear the "buzzing" sound, and the conveyor belt will stop automatically, indicating that the machine is normal and can be used.
