signal.Ground noises usually give a broa d un even signal when the coil
is sw ep t from different directions,and often may only give a signal
from one direction and no signal on the return sweep.
*I f you are not sure if the sound is ground noise or a target sign al you
should always in vestigate.Scrape a shallow hole about 30mm deep over
the suspected target.Sweep the coil over the hole at the original ground
le vel.Do not dip the coil in to the hole.If th e signal has decreased in
vo lume or is less def ined it is probably ground noise .If the signal
remains the same.or bec omes louder,it likely a metallic ta rget.if you
are still not sure make the hole deeper and repea t th e process .
*A “halo effect ”,whic h may be built up ar ound a buried meta l
ob ject,make s th e objec t appear to be la rger to th e detector than it
actually is .This will be reduced once the target is disturbed from its
po sition in the ground(e.g.a small ob ject,dete c ted at a substantial
de pth,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
eff ect”will not be present).
*D o not try to eliminate what might appear to be a faint,isolated
gr ound no ise by balancing th e detector over the target;you may be
“balancing out ”the target re sponse from a dee ply buried me tallic
ta rget.I t is better to Gro und Balan ce around the target,without going
across it,Then switch to Fixed and tr y Pinpointing.
*D ig all ta rget signals,eve n in pre viously detecte d areas.The MCD
Series have superior ground bala ncin g and depth so it is possible to
find new ta rgets in well-worked area s whe re other detectors have been
un able to cope with th e high degree of mineralisation an/or sa lt.
*I n some mineralised soils a response may be received from a
concentration of orange/redd ish dyke material or clay.Remember,a
me tal target will get louder by moving th e coil even centimetres closer.
*I f detecting ar eas of extreme ly variable mineralisation detec t along
