Nexus STANDARD MP V3 User Manual page 12

fast. It is strongly recommended that the MP V3 is used in All
Metal mode with audible level in the Threshold so that the
deepest targets can be registered.
Suggested operating heights for the standard coils are:
13" DD coil: 4" (100 mm) minimum above ground surface.
10" DD coil: 3" (75 mm) minimum above ground surface.
For larger coils the minimum distance to ground will be higher.
The suggested operating heights are set so that only metal
targets will cause changes in the Threshold. Carrying the coil
close to the ground will result in minor Threshold changes caused
by the ground, which may inhibit the detection of the deepest and
very faint targets.
However by applying a Mineral Controls up to a certain level the
MP V3 detector can effectively remove all residual ground noise
and then the search coils can be carried at any distance above
ground. In this case there will be some loss of depth.
Make sure that the coil is swung evenly over and parallel to the
ground surface and that the coil does not rise at each end of the
swing. Cover the ground in smooth, parallel swings to ensure
maximum detection coverage.
In All-Metal Mode, both ferrous and non-ferrous targets will give
the same audio response by a sudden increase in the intensity of
the threshold tone. A strong response indicates a large or
relatively shallow target and a weak response indicates a small or
deep target. Any audio signal in All-Metal Mode may be analysed
by using the RGB meter. To analyse a signal with the RGB Meter
observe its colour response in the exact time of audio response.
In VCO Multi tone Mode, good non-ferrous targets will give a
clear, well defined, two-way, repeatable audio signal with a
smooth rise in audio frequency. Ferrous targets will give a signal
by lowering the audio frequency and some time they may sound
10.