Minelab GP 3500 Instrukcja Użytkownika Pobierz pdf (Strona 16)

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l 4 controls and operation – front l

GP 3500

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Figure 4.21

Discrimination target

signal on a ferrous

target

Figure 4.20

A normal signal on a

non-ferrous target.

Discrimination - continued

The strength of the target response required for discrimination to occur may be altered by

rotating the control knob.

There is usually some merging of characteristics between targets, which are clearly ferrous

and others that ‘may-be’ ferrous. Rotation of the control knob allows the operator to make a

fine adjustment in the determination of the ‘may-be’ signals.

• (Fully anti-clockwise) – just past the ‘click’ turning discrimination on, will keep the

discrimination cautious and ‘may-be’ targets will respond with a normal non-ferrous

signal and only definite ferrous targets give the blanking. (as per Figure 4.20).

• (Fully clockwise) In this position, the control becomes a little less cautious and some

‘may-be’ targets will be seen as ferrous and give a blanking signal (as per Figure 4.21).

In this position some small non-ferrous targets eg: coated in ironstone, could be

mistaken for ferrous.

front controls

– continued

front controls

– continued

l 4 controls and operation – front l

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GP 3500

Discrimination - continued

Keeping the control anti-clockwise requires a slightly stronger signal before discrimination

occurs, rotating it clockwise means that discrimination will occur on a weaker target.

Discrimination functions will only work with strong, positive target responses. Weak

responses will give normal 'all metal' type signals.

HINT It is usually best to dig out all targets and only use the discrimination

function in areas where a large amount of rubbish makes the digging of everything

impractical.

Discrimination will give the best results when used in combination with the specially designed

GP Series Double-D coils and will not work correctly when using mono coils.

NOTE – If Pinpointing a target prior to digging, best results will be from switching out

of discrimination and into all metals.

Selection of how far to turn the discrimination knob should be determined by how cautious

you want to be and how much trash is in the area. If the area is heavily littered, you may want

to use a less cautious discrimination and have the knob in the 5.00 o’clock position. If there is

little trash in the area and most close to the surface you may prefer a more cautious position

of 9 – 12.00 o’clock.

TIP: If you are on a known gold producing site or successful patch, it is best to dig up all targets.

GP 3500

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John 21 Jul 2025 | 07:50:45

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Minelab GP 3500 Instrukcja Użytkownika Strona 16

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