6.1Ground balance calibration:Auto calibration:The auto calibration is just to turn the unit on.Calibrate by this method, after the unit turned on, a group of red light will keep blinking, after that, the calibration finished.6. 1.1.Balance modeThis method can eliminate the influence of the earth "mineralization reaction", and has better penetrability; therefore, whether indoor or outdoor work, have preferred this way; when the exploration of underground metal objects exist, species and identification of document to identify metal. In the balance of operating mode, as long as the probe is moved to the top of the target metal, the instrument will make a continuous sound, any type of metal will make the sound increases, the instrument detection indicator light will gradually increasing. The operation procedure is as follows:1) operation mode switch to a more balanced.2) raise the probe 70-80 MM off the ground.3) the power switch is turned on, press the button and release, clockwise until the "critical sound tuner".4)the probe is close to the ground, 10-15 cm from the ground, if the "critical sound" increases, lift the probe, to press the reset button and then loosen the adjustment knob counterclockwise, work left a little rotation, and then close to the ground and try again, if the sound is still increasing, according to the above procedure to work adjustment knob to rotate left a some try, after several adjustments, until the probe to lift up and put down the "critical" sound without change, to balance the fine; instrument after this adjustment, the earth's "mineralization reaction" basically be excluded, probe moving freely on the ground will not change the "critical" sound signal before the issue, only to detect metallic target. 5) if the probe near the ground in a low voice, his probe, press the button and release, will work adjustment knob clockwise rotate right, then close to interview a try, if the sound is still small, and then again, until the lift up and put down the probe sound the same.6) Note: before each of the above adjustments, to press the button and release. 7) according to the regulation, we can slowly moving the probe along the ground, in the process of detection instrument should always keep the "buzzing" "critical" sound, if sound slowly increases or decreases, can press, put the button to make the "critical" sound returned to normal; the metal in the detection, will instrument issue a big sound, detecting the indicator will light gradually increasing.
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