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.
THE BASICS OF METAL DETECTING
9
POWER
ON/OFF
Press
-
or
+
to
CHANGE THE
SETTING
of
the active
menu item
Press-and-Hold
PINPOINT
for
precision target
pinpointing
at any time
Press
MENU
to
make it active.
The current
selection is
indicated
with a “
•
”
HOW TO WORK THE CONTROLS
