In addition to the sensitivity adjustment potentiometer, the metal detector circuit has no adjustment part, and the circuit can work normally as long as the welding is correct. When the whole machine is static, that is, when the speaker does not sound, the total current is about 10mA. When the sound of the metal speaker is detected, the current of the whole machine rises to 20mA. A new laminated battery can work for 20 to 30 hours.
If the newly welded metal detector is not working properly, first check whether the components on the circuit board and the wiring are soldered incorrectly, and then measure whether the battery voltage and the power supply loop are normal. The voltage of the Zener diode VD1 is between 5.5 and 6.5V. Do not weld the polarity of VD2. Do not weld the primary and secondary ends of the oscillating coil in the disc.
Before using the metal detector needle detector, you need to adjust the length of the probe. Just loosen the rubber gel, push and pull the rubber sleeve to the appropriate length, and then rotate the rubber tube to tighten the cable and make the handle. With the tip facing up, the rubber gel is tightened after the Zui, locking the glue through sleeve. Thus, when holding the detector handle, the thumb is just right next to the sensitivity adjustment potentiometer.
When adjusting the sensitivity of the metal detector, the detection disc (oscillation coil) should be away from the metal, including the paper with aluminum foil, and then turn the sensitivity fine adjustment potentiometer knob (FINETUNING) to turn on the power switch, and rotate to half position, then adjust the coarse adjustment potential. The knob (TUNING) makes the speaker sound stop, and then fine-tunes the fine potentiometer after Zui, so that the speaker sound just stops, and the sensitivity of the metal detector is high. When detecting metal with a metal detector, the speaker will make a sound as long as the detection disc is close to any metal, and the sound will stop automatically when it is far away from a certain position.
This metal detector has a high sensitivity for repair. When it is used to detect large pieces of metal, the detector disc will emit sound when it is 20cm away from the metal object. It can be detected as small as a paper clip or even a pin, but the probe coil must be tight. Rely on small metal objects. Since the metal detector uses the electromagnetic induction of the oscillating coil to detect metal objects, it can pass through non-metallic objects such as paper, wood, plastic, masonry, soil, and even water layers. The needle detector manufacturer detects the covered metal objects. Therefore, it has practicality. For example, when decorating a house, it is used to detect the wires or steel bars in the wall to avoid construction hazards and safety hazards. For example, metal detectors for security inspection are made according to this principle.
If the newly welded metal detector is not working properly, first check whether the components on the circuit board and the wiring are soldered incorrectly, and then measure whether the battery voltage and the power supply loop are normal. The voltage of the Zener diode VD1 is between 5.5 and 6.5V. Do not weld the polarity of VD2. Do not weld the primary and secondary ends of the oscillating coil in the disc.
Before using the metal detector needle detector, you need to adjust the length of the probe. Just loosen the rubber gel, push and pull the rubber sleeve to the appropriate length, and then rotate the rubber tube to tighten the cable and make the handle. With the tip facing up, the rubber gel is tightened after the Zui, locking the glue through sleeve. Thus, when holding the detector handle, the thumb is just right next to the sensitivity adjustment potentiometer.
When adjusting the sensitivity of the metal detector, the detection disc (oscillation coil) should be away from the metal, including the paper with aluminum foil, and then turn the sensitivity fine adjustment potentiometer knob (FINETUNING) to turn on the power switch, and rotate to half position, then adjust the coarse adjustment potential. The knob (TUNING) makes the speaker sound stop, and then fine-tunes the fine potentiometer after Zui, so that the speaker sound just stops, and the sensitivity of the metal detector is high. When detecting metal with a metal detector, the speaker will make a sound as long as the detection disc is close to any metal, and the sound will stop automatically when it is far away from a certain position.
This metal detector has a high sensitivity for repair. When it is used to detect large pieces of metal, the detector disc will emit sound when it is 20cm away from the metal object. It can be detected as small as a paper clip or even a pin, but the probe coil must be tight. Rely on small metal objects. Since the metal detector uses the electromagnetic induction of the oscillating coil to detect metal objects, it can pass through non-metallic objects such as paper, wood, plastic, masonry, soil, and even water layers. The needle detector manufacturer detects the covered metal objects. Therefore, it has practicality. For example, when decorating a house, it is used to detect the wires or steel bars in the wall to avoid construction hazards and safety hazards. For example, metal detectors for security inspection are made according to this principle.
Portable Cable Reel,Garden Water Hose Reel,Retractable Garden Hose Reel,Wall Mounted Garden Hose Reel
NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.hosereelqikai.com