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TERMINOLOGY
The following terms are used throughout the manual, and are standard
terminology among detectorists.
ELIMINATION -
Reference to a metal being "eliminated" means that the
detector will not emit a tone, nor light up an indicator, when a
specified object passes through the coil’s detection field.
DISCRIMINATION
- When the detector emits different tones for different
types of metals, and when the detector "eliminates" certain metals,
we refer to this as the detector "discriminating" among different
types of metals.
Discrimination is an important feature of professional metal
detectors. Discrimination allows the user to ignore trash and
otherwise undesirable objects.
NOTCH
- Notching is the elimination of an item, or range of items, within
the metallic spectrum. We “notch-out” an object, or objects,
selectively. Objects to the left and right on the metallic spectrum
can be retained using the notch technique.
RELIC
- A relic is an object of interest by reason of its age or its association
with the past. Many relics are made of iron, but can also be made
of bronze or precious metals.
IRON
- Iron is a common, low-grade metal that is an undesirable target
in certain metal detecting applications. Examples of undesirable
iron objects are old cans, pipes, bolts, and nails.
Sometimes, the desired target is made of iron. Property markers,
for instance, contain iron. Valuable relics can also be composed of
iron; cannon balls, old armaments, and parts of old structures and
vehicles can also be composed of iron.
FERROUS
- Metals which are made of, or contain, iron.
PINPOINTING
- Pinpointing is the process of finding the exact location of a
buried object. Long-buried metals can appear exactly like the
surrounding soil, and can therefore be very hard to isolate from
the soil.
PULL-TABS
- Discarded pull-tabs from beverage containers are the most
bothersome trash items for treasure hunters. They come in many
different shapes and sizes. Pull-tabs can be eliminated from
detection, but some other valuable objects can have a magnetic
signature similar to pull-tabs, and will also be eliminated when
discriminating out pull-tabs.
GROUND BALANCE
- Ground Balancing is the ability of the detector to
ignore, or "see through," the earth’s naturally occurring minerals,
and only sound a tone when a metal object is detected. The
Legacy 3300 incorporates proprietary Super-Scan™ circuitry to
eliminate false signals from severe ground conditions
IN THE FIELD TECHNIQUES
- No-motion Pinpoint
In the PINPOINT Mode, coil sweep technique is not important. Rather,
user retuning is critical.
The detector does not automatically adjust to changing ground and
environmental conditions; the operator is required to make the
adjustment. If the detector sounds a constant tone over all areas of the
ground, retune the detector by pressing the PINPOINT button.
Pinpoint is used to find the exact location of a target which was previously
located and identified using the discrimination mode. As this mode does
not require motion over the target, the user can move the coil more slowly
and then narrow the detection field when near the target.
How to Pinpoint
Position the searchcoil an inch or two above the ground, and to the side of
the target. Then press PINPOINT. Now move the searchcoil slowly across
the target, and the sound will communicate the target’s location. As you
sweep from side to side, and hear no sound at the ends of the sweep, the
target is located in the middle of that zone, where the sound is loudest. If the
sound is loud over a wide area, the buried object is large. Use Pinpoint to
trace an outline of such large objects.
Narrow It Down
To further narrow the field of detection, position the searchcoil near the
center of the response pattern (but not at the exact center), and press
PINPOINT again. Now you will only hear a response when the searchcoil
is right over the top of the target. Repeat this procedure to narrow the
zone even further. Each time you repeat the procedure, the field of
detection will narrow further.
Consider Purchasing a Pinpointer
When you kneel down to unearth an object, you may find it frustrating as
the object can appear exactly like the surrounding soil. You may hold the
object in your hand, and find it necessary to pass a handful of dirt over the
searchcoil to see if it contains metal. An easier way is to use a handheld
pinpointer. It is a probe-like device which is poked into the ground, making
close up pinpointing a snap, reducing digging time, and minimizing the size
of the holes you will dig. Bounty Hunter offers a robust and inexpensive
pinpointer designed for this purpose.
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