Minelab GPX-4000 Quick Start Manual Download

Page: 15 / 47

Auto Tune

Search

Mode

Soil /

Timings

Ground

Balance

Coil /

Cancel

Tracking

Salt

Deep

Patch

Sensitive

Fixed

Double D

Threshold

Coil

Smart

Point

Search Mode

Each Mode has
factory preset
settings to suit that
style of searching.
Search Modes can
also be customised
to suit different
detecting conditions.

(pg. 28)

Soil/Timings

allows

you to change the
electronic pulses/
timings of the
detector to optimise
performance for
different soils and
target types.

(pg. 36)

Ground Balance

reduces the
effect caused by
mineralisation
in the ground.

(pg. 38)

Coil/Rx

allows

you to change the
sensitivity and
receive (Rx) fields
of the coil.

(pg. 44)

Auto Tune

automatically reduces

electrical interference.

(pg. 33)

Coil Connector

Connects the coil to the control box.

Smart Point

is a connection point

for the Quick-Trak button, located on
the handle. Minelab also uses this as a
test port to ensure that your detector
is operating at peak performance
before it leaves the factory.

Threshold

is the constant background

audio produced by the detector. This
control increases / decreases the level
of the Threshold.

(pg. 34)

Front Control Panel

Rear Control Panel

Function

Select

Setting

Off

Hold for

Once a function
has been selected,

Setting

allows you

to adjust its value.

(pg. 47)

Function Select

scrolls up or down
through the list
of functions.

(pg. 46)

LCD
(Liquid Crystal Display)

Displays all the menu
functions and settings.

Battery Connector

connects the control
box to the battery
and headphones.

On / Off

turns the detector
on and allows you
to restore Factory
Presets.

(pg. 26)

Summary of Contents for GPX-4000

Page 1: ...Tune button to reduce electrical interference The tuning process takes approximately 60 seconds Do not move the coil or pass metal objects near the coil during the tuning process pg 33 Whilst lowering and raising the coil between 25mm and 100mm 1 and 4 from the ground change the Ground Balance switch to Tracking Any variations in the Threshold will smooth out within 3 5 seconds pg 40 Adjust the Th...

Page 2: ...ding interference that may cause undesired operation For Consumers within the European Union Do not dispose of this equipment in general household waste The crossed out wheeled bin indicated on this equipment is an indicator that this unit should not be disposed of in general household waste but recycled in compliance with local government regulations or environmental requirements Please dispose o...

Page 3: ...ing MPS Dual Voltage Technology DVT and the latest in high tech analogue components combined with advanced digital processing The GPX 4000 will locate gold in all types of terrain especially highly mineralised ground conditions with greater efficiency than any previous detector This manual is designed to help both the beginner and expert prospector get the best performance out of the GPX 4000 Mine...

Page 4: ...re for Fixed 42 Coil Rx Changing Sensitivity Rx Fields of the Coil 44 Function Select Setting On Off Hold for FP AutoTune Search Mode Soil Timings Ground Balance Coil Rx Cancel Tracking Salt Deep Patch Sensitive Fixed Double D M N G Threshold Coil Smart Point Troubleshooting 81 Glossary of Terms 82 Taking Care of Your Detector 85 Technical Specifications 86 Warranty 87 Service Repair Form 88 Volum...

Page 5: ...n reduce noise The GPX 4000 utilises Minelab s proven Dual Voltage Technology DVT This ensures an accurate Ground Balance to provide maximum sensitivity and depth in all ground types The GPX 4000 can handle heavily mineralised and salty ground conditions with greater ease than previous detectors which effectively opens up NEW detecting areas The GPX 4000 offers three pre programmed Search Modes se...

Page 6: ...JVN PO BUUFSZ POUSPM PY FBEQIPOFT OTUSVDUJPO BOVBM 8BSSBOUZ BSE SNSFTU TFDUJPOT SNSFTU PMUT SNSFTU 8JOHOVUT SNSFTU 4USBQT SNSFTU PWFS 7FIJDMF IBSHFS EBQUPS 7FMDSP 5BCT VOHZ PSE MBNQ PX OVDLMF PMU 8JOHOVU VOHZ PSE BJOT IBSHFS EBQUPS PXFS 4IBGU 8BTIFST PXFS 4IBGU PMU PXFS 4IBGU 8JOHOVU List of Parts ...

Page 7: ...ver time the rubber washers may need to be replaced Assembly Attaching the Lower Shaft to the Upper Shaft 1 Rotate the twistlock of the upper shaft counter clockwise to ensure that it is loosened 2 Compress the spring loaded pin of the lower shaft Slide the lower shaft into the upper shaft until the pin reaches an adjustment hole The pin will spring out and clip into place Attaching the Handle to ...

Page 8: ...gh the slots in the armrest cover and then push the cover over the armrest Connecting the Control Box to the Upper Shaft 1 Place the detector on a flat surface with the handle facing upwards 2 Position the armrest on top of the control box 3 Clip the control box onto the armrest ensuring that the battery plug faces the rear 4 Fasten with the wing nuts 5 Wind the Quick Trak button cable around the ...

Page 9: ... harness strap to hold the belt in place 3 Turn the harness and waistbelt over so that the pouch faces downwards 4 Clip the shoulder strap buckles together Connecting the Battery Pack 1 Place the battery into the battery harness pouch 2 Connect the headphones and the power cable to the appropriate sockets in the battery Assembly LIP TOGETHER 4URN OVER Note The illustration shows the battery orient...

Page 10: ...omfortable Detecting pg 16 Attaching the Bungy Cord 1 Create a loop in the bungy cord 2 Undo the plastic wing nut and remove the bolt from the clamp 3 Push the bolt back through the clamp and loop to secure the bungy cord to the shaft 4 Fasten the screw with the wing nut 5 Clip the bungy cord onto one of the harness shoulder strap rings Adjusting the Detector for Comfortable Detecting pg 16 ...

Page 11: ...t your forearm in the armrest Adjusting the Position of the Handle Your elbow should sit just above the back of the armrest and you should comfortably grip the handle Slide the handle into position Using a screwdriver tighten the two screws to hold the handle onto the shaft Adjust the strap on the handle for your own comfort Adjusting the Length of the Lower Shaft The correct length of the lower s...

Page 12: ...ttery is in good condition and charged before using it to charge the GPX 4000 battery To Charge with the Vehicle Charger Adaptor 1 Disconnect the power cable from the battery 2 Connect the vehicle charger adaptor to the battery and to the vehicle accessories socket The colour scheme of the tri colour LED will indicate the status of the charging process pg 20 Don t leave the battery on charge in a ...

Page 13: ... within this battery pack Battery LED Patterns Brief cycling red orange green Occurs once or a few times when the detector is turned on or when a new battery is connected Very brief orange blink Beginning of charge Solid orange First phase of charge Orange with green blink Last phase of charge Solid green Battery is charged Slow orange blinking The battery has not been used for a long time and its...

Page 14: ...rget the Threshold blanks becomes silent indicating that a target is located underneath the coil but has been rejected Blanking is a useful way of distinguishing between desired and undesired targets pg 59 Low Battery When the battery is low a series of alarm signal pulses are given at 1 minute intervals pg 62 Targets Buried metal objects are referred to as targets Targets are comprised of both fe...

Page 15: ... interference pg 33 Coil Connector Connects the coil to the control box Smart Point is a connection point for the Quick Trak button located on the handle Minelab also uses this as a test port to ensure that your detector is operating at peak performance before it leaves the factory Threshold is the constant background audio produced by the detector This control increases decreases the level of the...

Page 16: ...the electronics of the detector The On Off button is located on the back control panel To turn the detector on or off Press and release On Off Many of the GPX 4000 functions are accessed through the LCD Menu These are explained in further detail throughout the rest of this manual pg 46 47 Until you become more familiar with the GPX 4000 the detector can simply be operated with the Factory Presets ...

Page 17: ...r more ground at a faster pace than in General mode Patch Mode isn t as quiet or stable as either General or Deep but allows a faster than normal sweep speed and will provide a very sharp target response When you want to search the area more thoroughly change to either General or Deep Mode Search Mode Deep Patch G Deep The Deep Mode should be used when you are detecting a small area very slowly an...

Page 18: ...s 3 Turn Function Select to the right to select the current mode The current mode is dependent on the mode switch on the front panel Note If the displayed mode is not the one you wish to restore you must change the mode on the front panel 4 Turn Setting left or right to restore Factory Preset settings for that mode Function Select Setting On Off Hold for FP FP Function Select Setting On Off Hold f...

Page 19: ... detectors operating close by The detector interprets this interference by the Threshold becoming erratic So that the detector experiences the least interference for the current environment the search channel can be changed automatically by the Auto Tune button on the control panel or manually in the Manual Tune setting via the menu pg 63 Auto Tune instructs the detector to automatically listen to...

Page 20: ...wded noisy room A high Threshold volume may also be uncomfortable for your hearing If the Threshold is set too low the target signal needs to be loud enough to become audible therefore very soft target signals from small or very deep targets may not be heard It is important to reset the Threshold level as conditions change For example your ears may adjust to the low levels of audio after an hour o...

Page 21: ...switching between Soil Timings there is a 1 second pause ie 1 second of Threshold to allow the change in the detectors electronics to take effect Normal N Normal gives you the best performance on a wide range of soil conditions and will provide the best depth on a wide variety of target sizes You will use this setting most of the time You should always use Normal in new areas where you are unsure ...

Page 22: ...lly where the mineralisation is changeable or when you want to cover a large area quickly and efficiently Fixed Fixed holds the last Ground Balance setting In ground where conditions allow Fixed will provide greater depth sensitivity and sharper target signals provided that a perfect Ground Balance is maintained Fixed will give slightly improved performance but will require re balancing when neces...

Page 23: ... This fast Ground Balance only lasts a short time so it is important to be moving the coil before attempting to ground balance Ground Balance re set in Tracking Whilst sweeping the coil you can test if you are still in harmony with the ground by stopping and raising and lowering the coil if the Threshold remains stable then you are still Ground Balanced If there is a change in the Threshold then y...

Page 24: ...d Whilst sweeping the coil test if you are still in harmony with the ground by stopping and raising and lowering the coil If the Threshold remains stable then you are still Ground Balanced If there is a change in the Threshold then you need to re set the Ground Balance setting This is achieved by simply repeating steps 3 6 of the Ground Balance procedure for Fixed Fixed Ground Balancing Tips When ...

Page 25: ...f the coil but to the left side and may give a complex signal when the target is very close to the coil so it is recommended to use the left edge of the coil to pinpoint shallow targets Cancel This setting provides a receive field that is particularly stable in areas of electrical interference This position is ideal for detecting close to neighbourhoods or where the Tune function has difficulty se...

Page 26: ... control accesses a settings adjustment screen The Function Select control scrolls through a list of functions Navigation Arrows indicate which way the menu can scroll Title indicates what type of function you are viewing general or mode dependant Functions There are two types of functions general functions under the Main Menu heading and mode dependant functions under the Mode Edit heading Functi...

Page 27: ...ght to scroll down the list The currently selected function is highlighted Accessing Settings Function Select Setting Function Select Setting Setting Setting Function Select Setting Function Select Function Select Setting Setting To return to the list of functions turn the Function Select control left or right Note The Battery Test screen will automatically return to the list of functions after 7 ...

Page 28: ... If the Volume is set to minimum most targets will potentially be very limited A low volume will be more comfortable on your hearing but will increase the risk of missing small targets Try using a large and small target to adjust the Volume to a comfortable level Threshold should be reset after adjusting the Volume level The detector is able to produce an extremely high volume if a large or shallo...

Page 29: ...p identify ground signals from small targets A low Tone setting may be more comfortable on your ears Tone is also a personal preference You may find that you hear targets better in a particular range of Tone Try using a large and small target to adjust the Tone to produce the most audible target signal for your hearing Audio Tone Adjusting the Pitch of the Threshold A high Signal setting will incr...

Page 30: ...ry Fast Ground Balance Every time you switch from Fixed to Tracking on the front control panel or via the Quick Trak button the GPX 4000 will initiate a very fast auto Ground Balance The Tracking Speed does not affect the speed of the initial very fast auto Ground Balance The GPX 4000 offers two separate Sensitive Soil Timings options Smooth and Extra The Sensitive timing found on previous GP seri...

Page 31: ...e in variable soils It is recommended that the operator be more active in checking their Ground Balance setting by stopping periodically and raising and lowering their coil and listening to any variations Ideally Specific Ground Balance should only be used in soils that are reasonably uniform or non variable Range Factory Preset Specific General General Ground Balance Procedure for Specific When m...

Page 32: ... 4000 to determine if the target is ferrous or non ferrous If the signal is weak the detector will give a non ferrous response until the signal becomes stronger due to a hole being dug and the coil getting closer to the target The Iron Reject function is designed this way for maximum accuracy Caution Do not attempt to discriminate by raising and lowering the coil on a deep or partially dug target ...

Page 33: ...aken for ferrous targets Iron Reject Rejecting Iron Targets A low level of Iron Reject requires a stronger ferrous signal before discrimination occurs A high level of Iron Reject will cause blanking on a smaller ferrous targets Very weak ferrous target responses will give normal all metal type signals Select the level of Iron Reject depending on how cautious you want to be and how much trash is in...

Page 34: ...hrough the full range of band numbers we recommend that you use the Manual Tune for fine adjustments after performing an Auto Tune If interference persists after tuning try reducing the Gain setting but in high interference areas you may need to use Cancel on the Coil Rx switch If the setting control is turned quickly you will notice noise caused by rapid movement through the channels This is norm...

Page 35: ...ral 8 Deep 9 Audio Type Changing the Audio Response of Target Signals The Audio Type function replaces the Boost switch on the previous GP Series detectors There are four options to choose from Each setting changes the way that the detector interprets a signal and how that signal is produced as an audio response Normal This may be used for general detecting conditions Normal provides the best comp...

Page 36: ...dium Fast Patch Med General Slow Deep V Slow Medium Is ideal for general detecting when normal slow low techniques are being used Fast Fast is useful when using a fast sweep speed to cover ground quickly In these circumstances a quick sharp target response is used to alert the operator to a target Fast will often have more ground noise but will allow you to cover more ground in a shorter amount of...

Page 37: ...ence on small targets and then goes to deep ground searching big nuggets the target signal response can be inverted so that the larger deep targets are giving the target signal they are most used to listening for Normal When Normal is selected and a small target is detected the pitch normally rises to a higher pitch and then falls to a lower pitch When a deep large target is detected the pitch nor...

Page 38: ...coil slowly around the area of the target keeping well away from the target itself then hold down the Quick Trak button to go to Fixed and pinpoint across the target Double D Setting Monoloop M Setting with DD coil Strongest Signal When a target is detected sweep the general area with the coil taking note of where the strongest signal is received By shortening the length of the sweep it should be ...

Page 39: ... dig to a depth of approx 50mm 2 4 Sweep the coil over the hole to determine if it has been dug If the target signal is not heard then the target should be in the pile just dug Otherwise dig a little deeper and check again 5 Start digging approx 100mm 4 in front of the target to reduce the chance of damaging it Damaging a nugget may reduce its value 6 If the target signal disappears from the hole ...

Page 40: ...en may only give a signal from one direction and no signal on the return sweep If you are not sure if the sound is ground noise or a target signal you should investigate Scrape a shallow hole about 70 100mm 2 4 deep over the suspected target Sweep the coil over the hole at the original ground level Do not dip the coil into the hole If the signal has decreased in volume or is less defined it is pro...

Page 41: ...etated to allow effective use of the 18 Monoloop It is an extremely stable coil and runs smooth in all but the worst soil conditions This coil has already become a favourite for many operators 18 Round Monoloop Superb depth and good sensitivity in low to medium mineralisation This coil will find targets in heavily worked areas where other operators have given up In addition to this there are also ...

Page 42: ...ntrations a smaller coil is preferable Search Pattern A Double D coil will typically provide a blade like detection pattern from the toe to the heel of the coil which gives excellent ground coverage A Monoloop coil has a detection field that is typically cone shaped which requires overlapping of sweeps to ensure thorough ground coverage There are five main things that you should consider when deci...

Page 43: ... Battery will not charge Check that there is power to the accessories socket using vehicle charger Check the fuse in the 12V charger plug M205 5A Check the battery LED patterns pg 20 Battery not holding charge Try an alternative charger adaptor Change the battery Coil Overcurrent screen appears Turn the detector off wait for a few seconds before turning it back on again User Preferences Main Menu ...

Page 44: ...or The control box generates the Tx transmit signals sent by the coil and processes the Rx receive signals detected by the coil All user selectable functions are located on the front and rear panels of the control box Discrimination The ability of a detector to determine if a located target is made from ferrous metal iron or steel or non ferrous metal non magnetic Double D Coils Two windings of wi...

Page 45: ...irs should be sent back to Minelab or a Minelab authorised repairer Taking Care of your Battery pg 21 Salt Mineralisation Salt content in the ground causes a negative response rather than the positive response of laterite soils A large salt content in the ground will have a different effect on the detector than other types of mineralisation Therefore the detector needs to use different filtering t...

Page 46: ...sible to assist our service engineers to rectify the problem quickly and efficiently Return the form with the detector parts in a cardboard box for protection Do not open the control box as this will void your warranty It is the responsibility of the owner to pay all transport costs for the detector to Minelab The repaired detector will be returned to the owner freight free Technical Specification...

Page 47: ...umber Purchased From Purchase Date Faulty Part s Owner s Name Address Telephone Day Home Fax Email Service Repair Form Description of Fault cut out or photocopy Please explain how we can replicate the problem in order to fix your detector ...

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