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Chapter 5 DFX
™
Pro Options
18. Bottlecap Reject
Adjusts how strongly the instrument rejects or
breaks up on iron.
Most starting programs use the minimum setting.
As larger numbers are selected, more
bias rejection
against iron occurs.
The advantage of higher BOTTLECAP REJECT
settings is that in high-trash areas more decisive
iron rejection occurs. Trash becomes easier to iden-
tify by the broken sounds they produce.
The disadvantage of a high Bottlecap Rejection
setting is if an iron target is close to a good metal,
the high degree of
bias
against iron may cause the
detector to cancel both responses. Another disad-
vantage is that all targets, iron and non-iron, tend to
start sounding more broken at high levels of BOT-
TLECAP REJECT. The operator needs to fi ne tune
BOTTLECAP REJECT according to their prefer-
ences and the conditions being searched.
Some ground conditions make it diffi cult for the in-
strument to recognize iron. BOTTLECAP REJECT
allows compensation for these areas.
(Discrimination section)
Tips -
If having diffi culties
recognizing the broken
sounds of iron, try increas-
ing BOTTLECAP REJECT.
Settings from 1 - 20 are
available.
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