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LCD Visual Display (continued)
Since different metal objects can produce similar signals, and since minerals in the soil can
distort the signals, the probable target ID's are just that -- probable. There is no way of
knowing for sure what's buried other than to dig it up. Experienced metal detector users have
a rule of thumb -- "when in doubt, dig".
DEPTH
When the trigger is pulled to facilitate pinpointing an object, the 2-digit numerical display
indicates the approximate depth of the object, in inches, based on the assumption that the
object is a typical U.S. coin. Small objects will read deeper than they actually are, and large
objects will usually read shallower than they actually are.
The DEPTH bar graph on the left of the display divides target depth into shallow, medium, and
deep. This depth range appears while searching, and is less accurate than the value derived
using the pinpoint toggle switch.
Bar graph ranges for a coin-sized object are Shallow (0-4inches), Medium (4-8inches), and
Deep (8inches +).
CONF (Target Confidence Indicator)
This 6-segment graphic indicates how confident the detector is of the 2-digit target
identification it has assigned. If all 6 segments are displayed, you can be confident that the
target ID is accurate. If 3 or fewer segments are displayed, the confidence is very low.
Junk targets tend to produce lower confidence indications than coin targets of similar electrical
conductivity. Sloppy sweep technique also reduces the confidence indication. You can use
this indicator to train yourself to sweep more skillfully.
BAR GRAPH (magnetite)
Fe
O
3
4
This bar graph displays the magnetic mineralization factor, or magnetic susceptibility, of the soil.
Magnetic susceptibility is expressed in terms of the percent volume of the iron mineral magnetite,
which most black sand is made of. The depth to which objects can be accurately identified is
strongly influenced by the magnetic susceptibility of the soil. High Fe
effect on detection depth in the Discrimination mode than in the All Metal mode. For the most
accurate Fe
O
reading, pump the searchcoil as though you were ground balancing.
3
4
Fe
O
approx.
3
4
Range
micro-cgs
3
7,500
1
2,500
0.3
750
0.1
250
0.03
0.01
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<14
Comprehensive Operating Manual & Guide to Metal Detecting
Description
uncommon but not rare, heavy mineralization
heavy mineralization, not uncommon in goldfields
heavy mineralization, but not uncommon in some regions
medium mineralization, typical
75
light mineralization, but common
25
light mineralization, your G. B setting may also be low
quartz & coral white beach sands
O
values have a greater
3
4
F75
25
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