Minelab GP 3500 Service Manual download pdf (Page 18)

THE MINELAB ‘GP extreme’

OPERATION

DETAILED OPERATING INSTRUCTIONS

Turn the ‘GP extreme’ On

• Hold the coil away from the ground and metal objects and switch

Power to On.

NOTE When the ‘GP extreme’ is turned Off, important

information (e.g. tuning frequency and ground balance) is

saved in internal memory.

If detection recommences in the same location, the user

should not have to re-tune or re-ground balance the

detector.

Set the Volume Control

Volume should be set so that target signals are clear and easy to

hear but loud signals are not uncomfortable to your hearing.

Set Volume by testing volume levels by passing coil across a large

target and setting volume at comfortable level. Now test very small

target at this level.

Set the Threshold control

• Adjust the Threshold control until the threshold is just audible

through the headphones.

NOTE Small surface objects, as well as large deep objects,

will produce very small changes in the threshold. It is

important to set the Threshold control correctly to ensure

that these targets are heard. Experiment with known targets

to assist in setting all controls to suit your hearing.

DETAILED OPERATING INSTRUCTIONS

HINT

Take time to read this manual

thoroughly to obtain the best

performance from your new

‘GP extreme’ detector.

THE MINELAB ‘GP extreme’

OPERATION

www.minelab.com

QUICK START INSTRUCTIONS (EASY REFERENCE)

easy reference

STEP 1 Turn Power switch On.

STEP 2 Set Boost to N (Normal) for general detecting.

STEP 3 Set Volume to maximum, and Signal to midway.

STEP 4 Adjust the Threshold control so that a faint sound is heard

through the headphones.

STEP 5 Adjust Tone for threshold level that suits your hearing.

STEP 6 To tune the detector, hold at waist height with the shaft

horizontal. Keep the coil vertical.

STEP 7 Slowly move coil around your body through a half-circle

until the noise from interference is loudest.

STEP 8 Hold this position, keep the coil motionless and push the

Tune switch once to start the tuning function.

STEP 9 Tuning takes approximately 60 seconds. A series of three

beeps will indicate that the optimum frequency has been

selected.

STEP 10 For Discrimination, change the Iron Discriminate

switch to Disc and set Level Adjust to the middle of its

range.

STEP 11 Set Soil switch to N (normal)

STEP 12 Set Rx switch to Normal

STEP 13 Set the Ground Balance by moving the coil up and down.

While coil is in motion, change Balance switch from Fixed

to Tracking

STEP 14 The detector is now ready for operation.

QUICK START INSTRUCTIONS

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Minelab GP 3500 Service Manual Page 18

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