How to use hand-held metal detector?
Hand held metal detector is used to detect metal objects carried by human body or objects. It can detect weapons, ammunition or small pieces of metal in packages, luggage, letters, fabrics, etc. The special appearance of its sensitive surface makes it easy to operate.
The hand-held metal detector is superior to the ring sensor type hand probe. Ultra high sensitivity, widely used in prisons, chip factories, archaeological research, hospitals and other occasions. The hand-held metal detector is used to check the specific position of the metal carried by the human body, and it can also be used with the metal detection door. When the metal objects are found by the security door alarm, the exact position of the metal objects can be found by the hand-held metal detector. The hand-held metal detector uses a rectangular detection head, with a detection area of 12 cm long. When inspecting the human body, the inspection work is completed from top to bottom.
Before use, first open the battery box cover on the back of the instrument and install the battery. This instrument uses 9V laminated battery. Please note that the nominal voltage on the battery must be 9V, and other voltages * cannot be substituted. The power consumption of this instrument is very low. Each newly installed battery can work for about 50 hours. When the battery energy drops to 10%, the instrument can no longer work normally. At this time, the horn will make intermittent clicking sound, indicating that we must replace the battery.
When using, the security inspector holds the handle with his hand, presses the start button with his thumb, and then releases it. The signal light of the instrument will start to flash, and the horn will emit a very slight beep at the same time, indicating that the instrument is in working state. Workers hold the instrument after power on and scan it back and forth on the surface of the inspected person (or object). If there is a metal object, the instrument will make a sound. After checking, press the stop button to avoid wasting the battery power.
How to judge the size of metal objects?
Physiological research shows that people's hearing is slow to the change of volume (logarithmic relationship), and sensitive to the change of tone (linear relationship). According to the above situation, the instrument uses the pitch to determine the size of metal objects, which is different from other similar products. It enables us to distinguish metal objects of different sizes more correctly.
When the probe of the instrument sweeps over the human body (object), if it makes a low sound, and the sound will gradually disappear after the probe stays on the top of the sounding place, we can judge that it is a very small metal, such as belt buckle, zipper, etc. If the sound is very sharp, even if the probe stops, the sound is still continuous, it must be a large piece of metal, such as weapons, ammunition, etc