Instruction Manual Page 7
Turn the Disc control further clockwise and objects of greater
conductivity will be ignored. If the Disc control is set to ignore the
pull-tab this will mean that all objects having a similar or lower
conductivity than the pull-tab will be ignored, while objects of higher
conductivity will still be accepted (see figure 14).
Figure 14 shows some common objects and where the Disc control would
have to be set to ignore them. As a general rule, the two objects
treasure hunters most commonly wish to ignore are aluminium foil and
pull tabs. As can be seen in Figure 14, these objects both cover a
significant range on the Disc control. The conductivity of objects that the
user wishes to accept or ignore often overlaps, so, setting the Disc
control to ignore both foil and pull-tabs will also ignore a large amount of
valuable non-ferrous objects including some coins, rings, and other
jewelry.
Example: If hunting for fine white gold rings with the Disc control set to
position 4 (see figure 15), some types of aluminium foil will also be
detected. To avoid old bottle caps, but detect brass buttons and copper
coins, the Disc control should be set higher (approximately at number
13).
Figure 13 - Target conductivity
Figure 14 - Discriminating targets based on conductivity
LOW
CONDUCTIVITY
HIGH
CONDUCTIVITY
FOIL
FERROUS
NON-FERROUS
CONDUCTIVITY
PULL-TABS
HIGH COINS
AND RINGS
COPPER, SILVER,
BRASS and LEAD
LOW COINS
AND RINGS
P0234-A
LOW
CONDUCTIVITY
HIGH
CONDUCTIVITY
FOIL
IGNORED
ACCEPTED
FERROUS
NON-FERROUS
CONDUCTIVITY
PULL-TABS
HIGH COINS
AND RINGS
COPPER, SILVER,
BRASS and LEAD
LOW COINS
AND RINGS
P0235-A
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