Minelab GP 3500 User Manual Download Page 26

technical specifications 

page 44

l

6 user info

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GP 3500 

page 44     

The GP 3500

Length

Maximum

1300mm

Minimum

1100mm

Weight

Complete with 11" coil 

2400g

(excluding battery)

Configuration

Shaftmount 

Transmission

Bi-level Pulse Induction

Technology

Dual Voltage MPS Technology 

Ground Rejection

Automatic ground balance

Search Mode

Motion detector

Controls

On/Off - Threshold

Pot w/ switch

Signal

1 turn control

Tone

1 turn control

Volume

1 turn control

Boost ( shallow/N/deep)

3 pos. Switch

Soil ( sens/N/salt)

3 pos. Switch

Tune (auto)

Push switch

Tune (manual)

Digital pot

Iron Discriminate (All Metal/Disc)

Pot w/ switch

Coil ( DoubleD/M/Cancel))

3 pos. switch

Track Speed ( Fast/M/Slow)

3 pos. switch

Balance (Fixed/Tracking)

2 pos. switch

Audio Output

6.35mm (1/4") headphone socket

Headphones

Supplied

Coil (standard)

11" Double D

Coil (accessory)

18" Double D or 18", 11" and 8" Mono

Battery

6VDC 12Ahr sealed lead acid 14-15hrs

Patents Apply

NOTE:

In the interest of product improvement, Minelab reserves the right to 
make changes without notice.

troubleshooting

l

6 user info

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page 45

GP 3500 

page 45

GP 3500 

www.minelab.com

If you need to return your detector to Minelab for service, please 
supply as many details as possible about the fault. This will enable our
service engineers to rectify the fault quickly and efficiently. 

Return the detector in a cardboard box for protection along with a copy of
the Service Repair Form supplied in this manual. 

Please supply your name, address and phone number along with purchase
date and serial number when sending detector parts for repair.

Do not open the control box as this will void your warranty.  

Use the following table to check for suggested solutions to problems. 

Fault

Suggestion

No sound

Turn 

Threshold

control fully clockwise.

Turn 

Volume

control clockwise.

Check power cable and connections.
Check headphones.
Check battery.

Threshold but no target signal

Try testing different coils.

Random noises

Check for other detectors interfering.
Retune using 

Tuning

button.

Charge the battery.
Set Coil switch to 

Cancel

.

Ground balance again.
Check for thunderstorm build-up.

Battery will not charge 

Check for power to cigarette lighter socket 

using vehicle charger

in vehicle.  
Check 10 amp fuse in charger plug.

Battery not holding charge

Try alternative charger.
Check power cable.

Very noisy threshold

Check for interference and re-tune.
Try detecting in a different location.
Set Coil switch to 

Cancel

.

Summary of Contents for GP 3500

Page 1: ...minelabusa com tel 1 702 891 8809 Minelab Electronics Pty Ltd PO Box 537 Torrensville Plaza South Australia 5031 AUSTRALIA email minelab minelab com au tel 61 8 8238 0888 Minelab International Limited...

Page 2: ...f care and consideration is taken during and after the removal of targets especially with respect to the back filling of holes this should ensure the continued access to areas for prospecting and trea...

Page 3: ...ence 11 Quick start instructions easy reference 12 Rear control functions rear panel 13 Front control functions front panel 20 table of contents l contents l page iii GP 3500 page iii GP 3500 www mine...

Page 4: ...inelab com introducing the Minelab GP 3500 l 1 introduction l page 1 The Minelab GP 3500 utilises Dual Voltage Technology DVT which assists accurate ground balance and increases sensitivity by overcom...

Page 5: ...ly 8 Upper Shaft 9 Handle with Quick Trak push button 10 Control Box 11 Armrest Parts 2 12 Nylon Bolt 2 13 Nylon Nut 2 14 Arm Straps 2 15 Armrest Cover C Headphones 16 Headphones D Battery and Battery...

Page 6: ...ete assembly instructions continued l 2 assembly l page 5 GP 3500 GP 3500 www minelab com page 5 Assembling the lower and upper shaft sections Refer Figure 2 2 Step 1 Slide the lower shaft 4 with coil...

Page 7: ...nuts by hand Step 2 Loop the Quick Trak button cable from the handle back along the shaft and plug it into the Smart Point connection in the control box 10 See page 33 Step 3 Adjust the shaft length...

Page 8: ...rovide enough power to operate the detector for 14 15 hrs when fully charged The battery may be recharged at any time during the discharge cycle It is very important to fully charge the battery before...

Page 9: ...ehicles which have a negative earth electrical system Most cars manufactured after 1970 should have negative earth electrical system Connecting the charger to a vehicle with a positive earth system wi...

Page 10: ...til finished sequence Step 12 Tuning takes approximately 60 seconds A series of 3 beeps will indicate that the optimum frequency has been selected Do not move the detector during the tuning process St...

Page 11: ...very soft signals An example of this would be to hear a whisper within a crowded noisy room If the threshold level is set too low there is no audible background signal and small target signals will n...

Page 12: ...ume alone Interpretation of the target signals involves understanding the difference between the rising and falling tone and volume of the threshold in response to different targets The Signal control...

Page 13: ...t switch provided that they have loudness limiters built in This prevents loud signals becoming unpleasant or dangerous to the user s hearing Figure 4 14 Boost switch rear controls continued l 4 contr...

Page 14: ...try see page 33 Quick Trak reset button for more details 2 It is a diagnostic test port that ensures that your detector is operating at peak performance before it leaves the factory Smart Point also a...

Page 15: ...rol is turned further clockwise the operator it able to influence the recognition of a target being ferrous or non ferrous metal Figure 4 18 All Metal Iron Discriminate switch page 22 l 4 controls and...

Page 16: ...l page 25 GP 3500 Discrimination continued Keeping the control anti clockwise requires a slightly stronger signal before discrimination occurs rotating it clockwise means that discrimination will occ...

Page 17: ...ose to the coil Cancel changes the electromagnetic field of the coil so that it is particularly stable in areas of electrical interference This position is ideal in areas where the operator wants to d...

Page 18: ...Fixed to continue detecting once this button is released When the ground is variable in mineral content requiring repeated re balancing use Tracking as the detector continuously tests the ground and...

Page 19: ...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...

Page 20: ...utton which allows easy operation of ground balancing The Quick Trak push button has two functions depending on where the balance switch is set on the control box If set to Fixed mode If the Balance s...

Page 21: ...g should be done initially with the Coil switch in Double D or in M Mono If the interference is still severe after completing the tuning operation change the Coil switch to Cancel and then re tune the...

Page 22: ...ntrol rapidly to move to the desired end you want you will notice noise caused by the rapid movement through the frequencies This is normal and will not be present when the control is turned slowly Th...

Page 23: ...often only present in one direction In some goldfields a response may be received from a concentration of orange reddish dyke material or clay Remember a metal target will get louder by getting the c...

Page 24: ...m a deeply buried metallic target Better to ground balance around the target without going across it then switch to Fixed and try Pinpointing identifying target signals continued l 5 detecting l page...

Page 25: ...d pass over the coil NOTE Your hands and wrists must be free of any metallic jewellery and watches Step 11 If there is no signal place the handful carefully in a new pile and repeat with another handf...

Page 26: ...to return your detector to Minelab for service please supply as many details as possible about the fault This will enable our service engineers to rectify the fault quickly and efficiently Return the...

Page 27: ...unauthorised service For specific details of the Minelab warranty please refer to the Product Warranty card It is the responsibility of the owner to pay all transport costs for the detector to Minelab...

Page 28: ...ntinually compensates for changes in the ground mineralization glossary of common terms page 48 l 6 user info l page 48 GP 3500 Halo Effect After a metal object has remained undisturbed in the soil fo...

Page 29: ...lses sent into the ground by the coil detector care and safety l 6 user info l page 51 GP 3500 GP 3500 www minelab com page 51 take care The GP 3500 is a high quality electronic instrument It has been...

Page 30: ...e equipment to be disposed of in an environmentally safe manner Working for a Cleaner Greener Future Disposal of unwanted electronic equipment in landfilled waste may contribute to adverse long term e...

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