Market and use of metal detector

Different metal detectors can detect all metal impurities of different materials, but on the whole, the sensitivity of the metal detector will decrease with the weakening of the magnetism of the magnet, so the service life of the equipment is relatively short and only iron metal can be detected Now the market is facing the situation of jigging Many medicines and foods in industrial production are packed with aluminum film or aluminum platinum, which can only be detected by aluminum foil metal detector The detector is originated from the end of the 20th century At present, most of the metal detector manufacturers that can be seen on the Internet are small-scale enterprises mainly engaged in trade These enterprises mainly carry out business in the way of network marketing to remind metal detector buyers not to be forgotten by the enthusiasm of metal detector sellers Except for the sensitivity adjusting potentiometer, there is no adjusting part in the circuit of metal detector As long as the welding is correct, the circuit can work normally When the whole machine is in static state, that is, when the speaker does not sound, the total current is about 10mA, and the metal speaker is detected to make sound If it can't work normally, first check whether the components and wires on the circuit board are welded correctly, and then measure whether the battery voltage and power supply circuit are normal Do not weld the primary stage and head and tail end of the oscillation coil in the detection disk wrongly Before using the metal detector, it is necessary to adjust the length of the detection rod As long as the black rubber tube is loosened, the rubber tube is pushed and pulled to the appropriate length, and then the rubber tube is rotated to make the cable tightly wound and the handle upward After Zui, the black rubber tube is tightened to lock the rubber tube In this way, when holding the handle of the detector, the thumb is just next to the sensitivity adjusting potentiometer When adjusting the sensitivity of the metal detector, the detector disk should be far away from the metal, including the paper with aluminum foil Then, turn the sensitivity fine tuning potentiometer knob to turn on the power switch, and turn it to half of the position Then adjust the coarse tuning potentiometer knob to stop the audio call of the speaker After Zui, fine tuning the potentiometer to stop the audio call of the speaker At this time, the sensitivity of the metal detector Z UI high When metal detector is used to detect metal, as long as the detection disk is close to any metal, the speaker will make a sound, and the sound will stop automatically when it is far away from a certain position.