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results, the gain setting should be at the maximum possible (fully
clockwise). However minimum level of the Sensitivity setting is
recommended for new Nexus users. At maximum sensitivity settings, a
slight tone change may be noted when both raising and lowering the coil.
This will not adversely affect the operation of the Nexus, providing that the
coil is kept at a reasonably constant level above the ground surface and
parallel to it while detecting.
Each Nexus metal detector is supplied with a scale positioned around the
Discrimination knob. Rotating the Discrimination knob CLOCKWISE
(Accept) will REDUCE the discrimination level and INCREASE the
sensitivity to smaller ferrous signals. Rotating the Discrimination knob
ANTI-CLOCKWISE (Reject) will INCREASE the discrimination level and
DECREASE the sensitivity to some non-ferrous targets and will result in
desired targets being missed. To obtain best Discrimination setting please
follow this procedure;
Firstly, for this procedure an iron nail rusty if possible) around 2" long is
required. While the detector is on turn the Discrimination knob fully clock
wise (accept). Push the Discrimination mode toggle switch forward (Iron
rejection mode). Then begin to move the nail from side to side across the
windings, pointed at 90 degrees against the middle of the coil. The nail
should be pointed to the coil with its peak side at no more than 11/2"
distance. In this case the nail will be detected as non ferrous target. While
moving the nail side to side begin turning the Discrimination knob slowly
anti clock wise until the tone in the headphones change from clear to
clicking. The position of the Discrimination knob in which the signal from
the nail begins clicking is the best Discrimination level for all Nexus metal
detectors. Having the scale around the Discrimination know will make it
easy to remember the optimum level setting. Finally, check again the
threshold and volume settings for comfortable levels.
The Nexus Standard SE is now ready for use. The coil should be swung
smoothly and quite slowly (approx. 1,5 second per swing) from side to side,
above the ground surface. It is ineffective to 'scrub' the coil on the surface
of the ground. Minimum suggested operating heights for the standard coils
are:
9" coil: 2" minimum above ground surface
6" coil: 1½" minimum above ground surface
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
7
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