Minelab GP 3500 Manuel d'utilisateur télécharger pdf (Page 19)

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l 4 controls and operation l

GP 3500

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Operating the GP 3500 in Fixed mode

In medium to quiet ground you will achieve better depth by operating your GP 3500 in the

Fixed position and using the Quick-Trak push button to re-balance when the ground changes

and/or threshold becomes erratic. If the ground is highly mineralized or variable, then

searching in Tracking may be the preferred position.

HINTS

• Where possible always search in Fixed position for best depth and only use Tracking mode

in areas with excessive ground noise or rapidly changing ground.

• When searching in Fixed position remember to re-balance periodically by pressing the

Quick-Trak push button in the handle. This returns you to Fixed once the re-balance is

completed and you release the button.

• Always Pinpoint a potential target in Fixed.

• If mineralization is excessive you may need to lift the coil off the ground by a cm or two,

rather than keeping it right on the ground. This will help to reduce the effects of high

ground mineralization and let you hear more targets much easier.

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l 4 controls and operation l

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GP 3500 GP 3500

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Operating the GP 3500 in Tracking mode

If the ground is highly mineralized or variable, search in Tracking mode.

To search in Tracking mode, switch the Fixed / Tracking switch on the control box into

Tracking position.

In this position the detector is continuously testing and re-balancing to compensate for

changes in the ground mineralization. There are three tracking speeds that you can search

in – Fast; Medium & Slow. – see next chapter for details.

When searching in Tracking mode, the Quick-Trak push button takes you into Fixed mode

while the button is depressed.

While in Tracking mode, the detector usually stops ground balancing when a target signal is

detected. However, a weak target response may not be recognised as a target if the coil is

repeatedly passed over it, and especially if operating in medium or fast tracking.

For this reason the push button should be used to change to Fixed when pinpointing a target.

When searching in Tracking, after locating a target or what you believe is a target, sweep the

coil around the target area, without passing across it, then hold in the Quick-Trak push button

and pinpoint the target location.

When releasing the button, the detector engages a short, fast tracking mode (indicated by a

beep) then returns to the Tracking mode.

TIP: When in tracking, you can use the push button as a ground balance reset.

Simply raise and lower the coil a few centimeters, periodically to check the

ground balance, and if it not completely balanced just push and release the

button while continuing the ground balance procedure.

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Minelab GP 3500 Manuel d'utilisateur Page 19

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