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THE BASICS OF METAL DETECTING
5. EMI (Electromagnetic Interference)
The searchcoil produces a magnetic field and then detects changes in that
magnetic field caused by the presence of metal objects. This magnetic
field that the detector creates is also susceptible to the electromagnetic
energy produced by other electronic devices. Cell phones, cell phone
towers, power lines, microwave ovens, lighting fixtures, TVs, computers,
motors, etc... all produce EMI which can interfere with the detector and
cause it to beep when no metal is present, and sometimes to beep
erratically.
The SENSITIVITY control lets you reduce the strength of this magnetic
field, and therefore lessen its susceptibility to EMI. You may want to
operate at maximum strength, but the presence of EMI may make this
impossible, so if you experience erratic behavior or "false" signals, reduce
the sensitivity.
USING THE DETECTOR
Sweep Method
Sweep the detector side-to-side over
the ground.
Keep the searchcoil parallel to the
ground as you sweep; do not lift the
searchcoil at the ends of your sweeps.
Searchcoil motion is required for target
detection (except when using Pinpoint).
CORRECT
WRONG
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