Salt The presence of high salt content in the ground being searched will
have a similar but different effect on the metal detector ground balance as
does mineralization.
Salt content causes a negative (-) response rather than the positive (+)
response of laterite soils. The detector needs to therefore use different
filtering techniques to overcome this effect.
Search Coil The search coil is the circular plate which is swept across the ground
surface during detecting. It transmits electromagnetic signals into the
ground and receives the response.
Search Pattern The search pattern is the area of ground underneath the coil which is
being scanned. Depending on the style of coil (Double D or Monoloop)
and the Coil mode being operated in (Double D/Mono/Cancel)
different coils will have a different shaped area being covered by each
sweep.
Threshold The continuous audible level of sound emitted by the detector is
referred to as the Threshold. This threshold hum is the background
sound made as the detector operates. Threshold can be set anywhere
between silent and loud, but a soft, audible level is normally suggested.
Target Response The electro-magnetic effect generated by the metal target under the
influence of the TX field.
Target Signal The audio signal (or change in threshold) caused by the presence of
a metal target as the coil passes across it.
Tracking The function of Automatic Ground Balance where the GP 3000
makes continuous adjustments to the ground balance to compensate
for changes in the mineralization of the ground.
TX TX refers to the transmit signals or electromagnetic pulses, sent into
the ground by the coil.
GLOSSARY OF COMMON TERMS
57
USER INFO
7
Содержание GP 3000
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