Nexus Metal Detectors User Manual page 7

4" coil: 1" minimum above ground surface
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 ground 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 analyzed by using the VCO. To analyze a signal with the
VCO, sweep the coil slowly across the target and listen the audio signal
response. The pitch of the sound will change to higher for all Non-ferrous
targets and it will lower when iron is detected. The pitch and intensity of the
signal responses will change in VCO mode with the changes of the
distance between the detected targets and the search coil.
In Discrimination Mode good non-ferrous targets will give a clear, well-
defined, two-way, repeatable audio signal. Ferrous targets will give a
'clicking' audio response or an indistinct and erratic response.
Pinpointing is carried by simply X-ing the coil across the signal. The
position where the signals are strongest indicates where the target is
buried. As with all detectors, when targets are of complex shape or are
located at an angle in the soil, pin-pointing may not be entirely accurate.
The use of VCO in most cases should help to improve the pinpointing
results.
TIPS
The Nexus Coronado may seem very different in operation to some
detectors presently available.
Considerable practice and experimentation with the settings is necessary to
get the best results on different sites.
Users should persist and regular use over a period of weeks is likely to be
needed to become proficient, especially in detecting the very deepest and
smallest of targets. Sweeping the coil too fast over the ground will result in
signals being missed. It must always be remembered that no detector can
find what is not there – nor can any detector give a signal unless the coil is
passed directly over that target.
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