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Level Adjust Control
Level Adjust gives the user the ability to select the sensitivity and
likelihood of a target being discriminated as ferrous when used in
the Disc mode.
This may also affect how the detector responds to ground mineralisation
compared to metal targets when used in Disc. Mode.
There is usually some overlap between signals from useful targets and
some types of iron rubbish. The user may set Level Adjust to select
the amount of discrimination between two extremes:
•
(Fully anti-clockwise). All targets detected, but some iron will
give a normal signal (as per Figure 5.4).
•
(Fully clockwise) Little iron detected, but some small non-ferrous
targets potentially mistaken as ferrous.
Turning the control anti-clockwise increases the strength of a signal
required for iron discrimination to be activated.
The Level Adjust also affects the Tracking mode.
When set fully clockwise, it is unlikely the detector will 'balance out'
genuine targets, but some ground noise may still give false signals.
When set fully anti-clockwise, the detector will 'balance out' ground
noise effectively, but some faint, weak target signals may be missed after
repeated sweeps of the coil.
HINT
It is usually best to dig out all targets and only use the
discrimination function in areas where a large amount of rubbish
makes the digging of everything impractical.
NOTE
Discrimination functions will only work with strong,
positive target responses. Weak responses will give normal
'all metal' type signals.
IRON DISCRIMINATION
5
37
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