Inland Metal Detecting contiued ***
Meter and Graph facilities provide a better discriminating system than Audio Discrim does on its own.
Also, they do not require as high a Discrim settings to cut out iron, this helps the detector to register lower density targets such as small thin gold or silver items.
The swing of the meter needle, or the signature of the graph, gives as near an accurate assessment of the target as you can hope to get without digging.
When the audio tone says there is a target there, if there is a left swing
of the needle, or a left signature on the graph, then it is probably iron. Leave the target or, if you are on a site where iron finds could be interesting, dig it. When the audio tone says there is a target
there, if
the meter needle swings right, or there is a right signature on the graph, it is unlikely to be iron, dig it. The iffy
targets are those where you get the audio tone, but no meter needle movement, or no signature on the graph. These could be small pieces of iron or silver paper, but I would still advise you to dig them. They could be a small silver
coin, either deep or on edge. A lot of coins are missed by not digging this type of signal.
If most of your detecting is going to be done on parks and picnic areas you may end up digging a lot of ring pulls
and silver paper. As mentioned in a previous paragraph, some detectors have a facility known as 'Notch Accept and Reject', or '?Learn to Accept and Reject'. These facilities were designed for this type of detecting. Use Reject
to ignore ring pull and silver paper targets.
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Use Accept to home in on specific targets, e.g. if someone has recently lost a silver
or gold ring in the area.With detectors with Notch or Learn facilities you can select a narrow band on the Discrim circuitry to reject or accept certain targets.
The detectors with a Meter or Graph systems can be even more specific. On some screens you can reject or accept the graph segments displayed along the graph line for particular targets, or you can just make a mental note of the point on the meter or graph where these type of targets register.
A word of warning.
When you set reject to ignore targets such as ring pulls and silver paper or foil, you are also rejecting targets such as thin section gold and silver rings. Losses of such items of jewellery are not uncommon in park and picnic areas
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