81
Detecting Tips
Follow these hints and techniques to help you to utilise the
power of your GPX Series detector, to ensure that every trip
is a success.
Identifying Target Signals
–
Metallic targets will usually give a ‘solid’ sounding signal
when the coil is swept across the object from any direction.
A metallic target generally produces a short, sharp and
mostly symmetrical signal. Ground noises usually give a
broad uneven signal when the coil is swept from different
directions, and often may only give a signal from one
direction and no signal on the return sweep.
–
If you are not sure if the sound is ground noise or a target
signal you should always investigate. Scrape a shallow hole
about 30mm (1”) deep over the suspected target. Sweep the
coil over the hole at the original ground level. Do not dip the
coil into the hole. If the signal has decreased in volume or is
less defined it is probably ground noise. If the signal remains
the same, or becomes louder, it is likely a metallic target. If
you are still not sure make the hole deeper and repeat
the process.
–
A ‘halo effect’, which may be built up around a buried metal
object, makes the object appear to be larger to the detector
than it actually is. This will be reduced once the target is
disturbed from its position in the ground (e.g. a small object,
detected at a substantial depth, may be more difficult to
detect once disturbed from the ground and lying in the
loose dirt. If the object is re-buried the ‘halo effect’ will not
be present).
For Maximum
Gold Recovery
Keep the coil as close to the
ground as possible.
Listen carefully. This is more
important than looking.
Slow down, do not rush,
take your time.
Have a positive mind set
and imagine a nugget at
every next sweep!
Remember that covering
a small section of ground
thoroughly will be more
productive than randomly
searching a larger area.
Summary of Contents for GPX 4800
Page 1: ...Instruction Manual...
