How to Use a PI Metal Detector
Metal detectors detect the presence of metal objects. From treasure hunting to security in airports, metal detectors are used in a variety of applications. Archaeologists use them to discover precious antique coins and hobbyists use them to find gold nuggets. A PI metal detector is a metal detector that uses pulse induction (PI) technology. Although not as popular as other types of metal detectors, PI metal detectors have deeper ground penetration, allowing you to locate items that others have missed.
Instructions
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Switch on the detector and test the battery strength. PI metal detectors use long-life alkaline batteries; if you find the batteries are weak, replace them. The PI metal detector features a gauge measuring the strength of your batteries.
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Tune the PI metal detector before using it for the first time. Connect a set of stereophonic headphones to the metal detector and adjust the volume level. Tweak the threshold unit by slowly turning the threshold knob while passing the detector over a known sample of metal until the detector is tuned in. Automatic tuning is available on many PI metal detectors. This method is often preferred because the user need not keep tweaking the instrument to keep performing at its utmost sensitivity. This way the search will be easier and there will be less interference.
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Start your hunt by sweeping the search coil in a side-to-side motion as you walk around the search area. Keep it a few inches above the surface. Scan steadily and restrict your sweep to about one to two feet per second. Try to sweep in a straight line and you may also overlap sweeps if needed.
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When the detector finds metals, it sends out an audio alert. Listen for a change in pitch in the sound produced by the metal detector. For searches in water, the alert will be in the form of vibrations and slow ticking sounds. When an object is found, the vibration will intensify into a drone. Use a small spade shovel to unearth any buried items.
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Tips & Warnings
PI systems fail to differentiate among types of metals, but it is compatible for searches deeper underground and for saltwater exploration.
