9
BASIC OPERATION
POWERING UP
Press the POWER
touch pad.
• The detector will
beep 4 times
• All display
segments will
illuminate
momentarily
• The SENSITIVITY
(left) and BATTERY
(right) indicators will
stay illuminated
MOTION and NO-MOTION MODES
Depending on the operation mode selected, the Legacy 3300 detects
metal both with the coil in motion, or with the coil motionless. In the
PINPOINT mode of operation, metal is detected with the coil
motionless over the ground. This no-motion operation helps to locate
the exact location of buried objects, and is very useful in
understanding the size and shape of buried metal objects. The
PINPOINT mode offers deeper ground penetration, but cannot
classify targets, nor indicate their depth.
The other operating modes require the coil to be in motion to detect
a target. When in the DISCRIMINATION, ALL-METAL or NOTCH
modes, the coil must be in continuous motion. It is often useful to
search for targets in a motion mode, and when identified, pinpoint
their location with the PINPOINT control.
SENSITIVITY
At its default sensitivity setting, the detector will detect a coin-sized
object, such as a quarter, buried approximately seven inches deep.
To change the sensitivity level, and thus the detection depth, press the
SENSITIVITY
▲
or
▼
keys. The 6-segment scale at the left of the
display, above “coin depth”, indicates the sensitivity level when these
touch pads are depressed.
CAUTION:
At higher sensitivity levels, the detector is susceptible to electromagnetic
interference from electronic devices. Reduce sensitivity if demonstrating
indoors or if using near power lines or electrical equipment.
Reduce sensitivity if detector emits false signals
16
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 20 feet apart.
If the detector beeps erratically,
REDUCE THE SENSITIVITY
by
pressing the Sensitivity
▼
Pad on the left of the control panel.
SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection
signals caused by severe ground conditions. While your Legacy 3300
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 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.
SENSITIVITY ADJUSTMENT
(motion modes only)
