18
buried objects by the nature of the detector’s
response.
You may encounter some false signals as you
proceed. False signals occur when the detector
beeps, but no metal target is present. False
signals can be induced by electromagnetic
interference, oxidation, or highly mineralized
ground soils. If the detector beeps once, but
does not repeat the signal with several
additional sweeps over the same spot, there is
probably no target present.
When searching very trashing ground, it is best
to scan small areas with slow, short sweeps.
You will be surprised just how much trash metal
and foil you will find in some areas. The
trashiest areas have been frequented by the
most people, and frequently hold the most
promise for finding the most lost valuables.
Also maintain the search coil positioned just
above the surface of the ground, without making
contact with the ground. Making contact with
the ground can cause false signals.
In The Field Techniques -cont
3
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.
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 Adventure
5500 incorporates proprietary Squelch-Tech
®
circuitry to eliminate false signals from severe
ground conditions
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