Size And Depth Of Buried Objects; Emi - Bounty Hunter Platinum Owner's Manual

THE BASICS
screen in different categories from left to right. A 2-digit numerical
reading is also provided in the middle of the display for more precise
target identification. The DISCRIMINATION Mode requires motion:
sweep the searchcoil over the metal object.

4. Size and Depth of Buried Objects

When using the detector in the motion DISCRIMINATION Mode, the
relative depth of an object is displayed at the bottom of the display in
a 3-segment format: shallow, medium, or deep. A more accurate
depth reading is available in a no-motion mode, using PINPOINT or
ALL METAL Mode. These modes display target depth in inches. These
no-motion modes do not require the coil to be in motion to detect
metals. The ability to hold the searchcoil motionless over the target
also aids in tracing an outline of the buried object, or in pinpointing the
exact location of the object using techniques described in the
pinpointing section.
5. Electromagnetic Interference (EMI)
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. 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.
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