14
DEPTH SELECT (Sensitivity Adjustment)
Upon power-up, the detector defaults to 3/4 sensitivity. To increase to full
sensitivity, press the DEPTH SELECT touchpad once.
ELECTROMAGNETIC INTERFERENCE
The principle use for the Sensitivity Control is to eliminate
Electromagnetic Interference (EMI).
A hobby 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 30 feet apart.
If the detector beeps erratically, REDUCE THE SENSITIVITY by using the
Depth Select Control.
SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection
signals caused by severe ground conditions. While your Quick Silver
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 also
cause the detector to false.
If the detector emits false, non-repeatable, signals, REDUCE THE
SENSITIVITY.
MULTIPLE TARGETS
If you suspect the presence
of deeper targets beneath a
shallower target, reduce the
sensitivity to eliminate the
detection of the deeper
targets, in order to properly
locate and identify the
shallower target.
