Operation method and sensitivity of the metal detector

The metal detector is composed of two parts, namely the detection head and the automatic rejection device. Among them, the detection head is the core part, which consists of three coils, a central transmitting coil, and two equivalent receiving coils. The three sets of coils are fixed in the detection head, and the oscillator is connected to the central radiation coil. A high-frequency AC magnetic field is generated, and the receiving coils on both sides are connected so that the induced voltages cancel each other before the magnetic field is not disturbed. Next, let's take a look at the operation method and sensitivity of the metal detector. Here are some answers.

Here is the content list:

• Description of the operation method of the metal detector.

• Low sensitivity test and sensitivity adjustment of metal detector.

Description of the operation method of the metal detector.

Turn on the power switch of the metal detector and hear a "click" sound, indicating that the power has been switched on, and the green light is on at the same time. If the green light is not on, it means that the battery is not installed or the battery is in poor contact. If the sound is continuous or vibrates, it means that the battery can no longer be used and should be replaced with a new battery. Sound and vibration switch selection: press the red button switch, the alarm mode is vibration. Release the red button switch, and the alarm mode is sound. After turning on the power of the metal detector, high-sensitivity detection can be performed. Hold the handle to scan the detection surface around the object to be measured. When there is a metal object, it will sound an alarm or vibrate, and at the same time, the green light will change to red; stop the detection, The alarm sound or vibration will stop and the red light will change to green light.

Low sensitivity test and sensitivity adjustment of metal detector.

If you need to get rid of the small objects in the metal, you can press and hold the low sensitivity switch of the metal detector. When scanning around the measured object, an alarm sound or vibration will sound when there is a metal object, and at the same time, the green light will change to red light; when the scanning is stopped, the sound or vibration will stop, and the red light will change to a green light. Because the sensitivity is reduced by more than 5 times at this time, the metal detector generally detects relatively large metal objects at this time.

If the detection distance of the metal detector is not up to the specified requirements or the sensitivity is too high to cause instability or sound or vibration when the human body is scanned without metal, the sensitivity should be adjusted. Put the sound and vibration switch in the "release" state, use a small flat-blade screwdriver to insert it from the small hole on the handle of the metal detector and turn it clockwise until it sounds, and then turn it counterclockwise until it stops sounding. Rotate half a turn counterclockwise until the sensitivity meets the requirements.

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