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SENSITIVITY ADJUSTMENT
ELECTROMAGNETIC INTERFERENCE
Use the Sensitivity Control is to eliminate
Electromagnetic Interference (EMI).
The F2 metal detector is an extremely sensitive
device; the search coil creates its own
magnetic field and acts like an antenna. If
your detector beeps erratically when the
search coil is motionless, the unit is probably
detecting another electromagnetic field.
Common sources of EMI are electric power lines, both suspended and buried,
motors, and household appliances like computers and microwave ovens.
Some indoor electronic devices, such as dimmer switches used on household
lighting, produce severe EMI and can cause the detector to beep erratically.
Other metal detectors also produce their own electromagnetic fields; so if
detecting with a friend, keep two metal detectors at least 20 feet apart.
R
If the detector beeps erratically, R
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Pad on the left of the control panel.
In most urban environments, you should be able to search without chatter from
interference at the default sensitivity setting (default setting is the sensitivity level
at power-up, 4 bars), or at one level reduced from default. At maximum
sensitivity, the F2 will "chatter" in proximity to underground or overhead power
lines, or to indoor or outdoor electrical devices. In fact, if you notice rapid
chatter with the searchcoil near the ground, you may be able to trace the
approximate location of the underground power lines by following the chatter.
To manage chatter, which is most likely from electrical interference:
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Try sweeping it over the ground.
If the F2 chatters while held still, or held up in the air, it may be much
quieter when sweeping over the ground.
SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection signals
caused by severe ground conditions. While the detector contains circuitry to
eliminate the signals caused by most naturally occurring ground minerals, 100%
of all ground conditions cannot be anticipated. Highly magnetic soils found in
mountainous and gold-prospecting locations can cause the detector to emit
tones when metal objects are not present. High saline content soils and sands
can sometimes cause the detector to beep when no metal target is present.
If the detector emits false, non-repeatable, signals, REDUCE THE SENSITIVITY.
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by pressing the
until the chatter stops.
QUICK-START DEMONSTRATION
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• A Nail
• A Zinc Penny (dated after 1982)
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a. Place the detector on a
table, with the search
coil hanging over the
edge. (or better, have a
friend hold the detector,
with the coil off the
ground).
b. Keep
the
searchcoil
away from walls, floors,
and metal objects.
c. Remove watches, rings
and other jewelry or metal objects from hands and wrists.
d. Turn off appliances or lights that cause electromagnetic
interference.
e. Pivot the search coil back toward the detector body.
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a.Notice a different tone for
each object.
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Nail
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Nickel
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Zinc Penny
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Quarter
b.Motion is required. Objects
must be in motion over the
search coil to be detected.
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Twice
a. The first press illuminates
all target icons.
b. The second press turns
off the "IRON" icon.
Quick-Start Demo continued
on next page
• A Quarter
• A Nickel
e
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