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GPX 5000 Range
GPX 4800 Range
Factory Preset
Off (All Metal), 1–10
Off (All Metal), 1–10
Off (All Metal)
Iron Reject
The GPX Series are capable of rejecting many ferrous (iron)
targets while still detecting non-ferrous targets.
While detecting in littered sites, much of the shallow iron
rubbish may be ignored with a high probability that valuable
targets will not be missed.
When Iron Reject is turned off no iron targets will be rejected.
Therefore, all types of metals will produce a target response.
This is known as ‘All Metal’ and is the preferred setting for
most situations.
In All Metal the detector will give varying volume and pitch
signals. This information does not indicate the type of metal in
the object.
When a target has been located; select an appropriate Iron
Reject setting; switch Ground Balance to Fixed, and sweep
over the target. The coil should be passed back and forth
over the target centre several times. Keep the sweep across
the target at an even height and as close to the ground
as possible.
Note:
When a target has been
located the coil should be
passed back and forth over
the target centre several times.
Remember to set Ground
Balance to Fixed for this and
keep the sweep across the
target at an even height and as
close to the ground as possible.
Target signals when detecting in All Metal.
Target signals using Iron Reject. Ferrous target blanked.
Ferrous Target
Audio Signal
Audio Signal
Blanking Signal
Non-Ferrous Target
Threshold
Threshold
Ferrous Target
Non-Ferrous Target
Tip:
Pinpointing a target
prior to recovery is best
achieved with Iron
Reject Off.
Summary of Contents for GPX 4800
Page 1: ...Instruction Manual...
