Minelab `GP 3000`
Contents
1. Figure 4 5 Threshold control too low No Sound Small Target Target Too Low P0532 A Figure 4 6 Threshold control too high Boost Shallow N Deep Figure 4 3 Enhances the signals produced by different types of targets Shallow enables target signals from small objects close to the surface of the ground to be amplified This allows for easier detection This setting is best suited for quiet ground N Normal may be used for normal detecting conditions This setting responds to all signals without boosting Deep may be used when searching for large targets at greater depth in noisy ground Random soil signals are smoothed making small changes in the audio signal from large deep targets easier to hear This may mask some Signals from very small targets near the surface Threshold Figure 4 4 Adjusts the background audio signal or threshold level The Threshold control should be set just above the point where the threshold is just audible and stable This level should not be ata level where prolonged use may be irritating Ideally it should be a smooth gentle hum Small targets or large deep targets may not produce a distinct target signal but may cause only a small variation in the threshold level If the threshold level is set too high or too low these very small variations may be missed In Figures 4 5 4 7 the dotted line represents the level at which the audio ou2. Recovering Deep Targets The GP 3000 has depth capabilities that will surprise both new and experienced prospectors If the targetappears to be buried deeply it should help to use the following technique step1 Use the cross sweeping method to locate the targetaccurately step2 Digahole large enough to insertthe coil approx 100mm deep step3 Keep testing the targetlocation as you dig deeper step4 Take care that the targetis notin the wall of the hole You may dig pastit Try pinpointing again to check your hole is in the correct position Hauan Removing rubbish and refilling holes will help metal detector users maintain a good reputation This should lead to more areas being readily accessible for prospecting RECOVERING THE TARGET Headphones 16 Power Cable to Detector 19 6 Volt Battery 17 Battery Pouch 18 P0503 A Figure 2 6 The GP 3000 battery assembly step 4 Ensure that the power switch on the control box is switched off and plug the connector on the power cable 19 into the battery connector plug on the control box This cable connects the battery and headphones to the detector Adjust for your own comfort step1 Adjust the bungy cord 21 from the knuckle 22 on the shaft to correct length to take some of the weight when prospecting step2 Adjust the hand strap on the handle 9 for your own comfort COMPLETE ASSEMBLY INSTRUCTIONS
3. THE MINELAB GP 3000 THE MINELAB GP 3000 RECOVERING THE TARGET www minelab com When you are sure of the location of the target it is necessary to dig a small hole to recover it In order to preserve the environment the hole should be as small as possible Always replace the soil and grass which is removed Itis essential to carry at leastone of the following digging tools with you when searching small strong digging spade pick e shovel and crowbar for very deep objects in hard ground steP1 Before digging clear the area of loose surface material and check that the target signal is still there If itis not the target should be amongst the surface material step 2 Ifthe target signal is still present dig to a depth of approx 50mm step 3 If the target cannot be seen sweep the coil over the hole step 4 lf the target signal is not heard then the target should be in the pile just dug steps Check that there are no objects buried in the soil under the pile stepe Take care when you dig as damaging a nugget may reduce its value Start digging approx 100mm in front of the target to reduce the chance of damage step7 Pile the diggings carefully as it may be necessary to search them steps If the targetis located in the soil which was removed sweep the coil over the pile and pinpoint its exact position RECOVERING THE TARGET THE MINELAB GP 3000 THE MINELAB GP 3000
4. oe The Minelab warranty does not cover damage caused by accident AUSTRALIA UNITED STATES OF AMERICA IRELAND S sa erand enciosg misuse neglect alteration modifications or unauthorised service email ho minelab com au email minelab minelabusa com email minelab minelab ie it with the detector PESE EN 7 l tel 61 8 8238 0888 tel 1 702 891 8809 tel 353 23 52101 For specific details of the Minelab warranty please refer to the Please supply as much detail Product Warranty card about the fault as possible This AN Visit our site on the World Wide Web http www minelab com for the latest information will assist our service engineers Peele de lea OF ile omer to pay al rans pOFt aste forthe on Minelab products and services fo vastity the prablem detector to Minelab quickly and efficiently The repaired detector will be returned to the owner freight free Mo This warranty is not transferable or valid unless the enclosed warranty registration card is returned to Minelab Electronics Pty Ltd or an authorised Minelab Electronics Pty Ltd regional distributor within 14 days of the original purchase 7 5 a fs WARRANTY www minelab com 7 5 3 A o THE MINELAB GP 3000 SERVICE REPAIR FORM If necessary use the space provided overleaf to continue your description of the fault Owner s Name Address o Phone Day 222222 Home 9 ee Fax Email SERVICE REPA
5. Double D has the coil operate in a conventional Double D search pattern with all the same advantages and disadvantages DETAILED OPERATING INSTRUCTIONS Operation However experienced you are at using a metal detector it is important that you read this chapter to understand how to use the GP 3000 to its full capacity THE MINELAB GP 3000 THE MINELAB GP 3000 QUICK START INSTRUCTIO www minelab com DETAILED OPERATING INSTRUCTIONS steP1 SetCoil switch to Double D step2 SetSoil switch to N Normal steP3 SetBalance switch to Fixed step4 Setlron Discriminate switch to All Metals steps Set Boost to N Normal for general detecting steps Set Volume to maximum and Signal to 2 o clock step7 Turn Power switch on steps Adjustthe Threshold control so thata faint sound is heard through the headphones step9 Adjustthe Threshold Tone to suit your hearing step 10 To tune the detector hold at waist height with the shaft horizontal Keep the coil vertical step 11 Slowly move coil around your body through a half circle until the noise from interference is loudest step 12 Hold this position keep the coil motionless and push the Tune switch once to start the tuning function STEP 13 Tuning takes approximately 60 seconds A series of three beeps will indicate that the optimum frequency has been selected step 14 For Discrimination change the Iron Discriminate switch to Disc and s
6. Metallic targets will usually give a solid sounding signal when the coil is swept across the object from any direction Ground noises usually give a broad uneven signal when the coil is swept from different directions A metallic target generally produces a short sharp and mostly symmetrical signal If you are not sure if the sound is ground noise or a target signal you need to investigate Scrape a shallow hole about 70 100mm 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 itis probably ground noise If the signal remains the same or becomes louder itis likely a metallic target If you are still not sure make the hole deeper and repeat the process You may also notice that mineral noises are often experienced from one direction only on the return swing it is no longer there A halo effect which may be built up around a buried metal object makes the object appear to be larger to the detector than it actually is This will be reduced once the target is disturbed from its position in the ground e g a small object detected at a substantial depth may be more difficult to detect once recovered from the ground If the object is reburied the halo effect will disappear Xam Do not try to eliminate what might appear to be a faint isolated ground noise by balancing the detector because you
7. www minelab com Pinpointing To find an object and reduce the size of the hole required to remove it from the ground itis necessary to pinpoint the exact location of the object If a targetis heard first confirm it by setting an accurate ground balance and then pinpointing To ground balance the coil should be passed around the area of the target making sure that the targetis not detected keep the coil away from where the targetis While the coil is moving around the area of the target change Balance to Fixed This will give a very accurate ground balance on this area One of the pinpointing techniques may then be used a e r 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 possible to draw an imaginary line in the ground where the strongest signal is located The GP 3000 is supplied with a 6v DC Line up the target at 90 from the initial direction and repeat the process The object is located where the two imaginary lines cross see Figure 6 4 rechargable battery pack plus both mains and vehicle chargers This chapter provides details on battery installation TARGET COULD BE SWEEP ANYWHERE IN THIS DIRECTION gt gt AREA EXACT LOCATION OF TARGET 4 C i T IMAGINARY LINE OF STRONGEST SIGNAL use and performance SWEEP COILAT 90 DEG P0173 A TO PREVIOUS
8. depth in salty environments However the interfering signals caused by highly concentrated salt may not be able to be completely balanced out if using automatic ground balance alone Lea Change Soil switch to Salt setting for salty environments To use the saltsetting you will have to use the specially designed GP 3000 range of coils RECOVERING THE TARGET THE MINELAB GP 3000 HINT step9 Keep halving the pile which has the target THE MINELAB GP 3000 www minelab com When the object has been recovered it may be worthwhile sweeping the hole again to ensure that there are no other targets If you find an object in a particular location search the surrounding area very carefully It is likely that there are more objects nearby If you hear a target signal keep searching until you find the object it is there and may be valuable sTeP 10 If itis still difficult to find the target place the detector on the ground with the coil horizontal step 11 Take a handful of the diggings and pass over the coil Your hands and wrists must be free of any metallic jewellery and watches step 12 Ifthere is no signal place the handful carefully in a new pile and repeat with another handful Always refill any holes before leaving and scatter leaves etc to restore the area to its original condition Any rubbish you recover should be taken away with you and disposed of properly
9. in a smoother threshold enhancing your ability to hear faint signals caused by small and deep targets This allows you to revisit old worked out areas and find the gold others have missed Minelab wished to thank you for purchasing our most advanced gold detector ever and are confident the GP 3000 will lead you to success in your quest for gold and treasure INTRODUCING THE MINELAB GPEXTREME THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com WARRANTY Contact Minelab 1 R The GP 3000 control box has a 2 year warranty covering parts and 2 Minelab is always interested in your opinions so if you have any questions or comments epalrs labour Refer to your warranty card for details E regarding the GP3000 or any other Minelab product please feel free to contact us via your local Authorized Minelab dealer or write to us In the unfortunate circumstance The GP 3000 1100 and 1800 coils have a warranty for one year l that the detector needs to be against malfunction Refer to either your supplier or Minelab directly a i i for service S Minelab Electronics Pty Ltd Minelab USA Minelab International Limited FAUTRA 2 meen tor SANSS PO Box 537 Torrensville Plaza 2700 E Patrick Lane Suite 11 Laragh Bandon please fill out the Minelab Service The commencementof the warranty is the date of purchase Repair F hot f South Australia 5031 Las Vegas Nevada 89120 Co Cork ae pa L
10. learn methods to minimise false signals and to hear subtle differences between target signals and false signals Metals composed of or containing iron A ferrous item is one which is attracted to a magnetand is predominantly or completely made of iron or steel The ability of the metal detector to compensate for the effects of ground mineralisation The GP 3000 has automatic ground balance When itis used in Tracking mode it continually compensates for changes in the ground mineralisation GLOSSARY OF COMMON TERMS 7 5 2 Z 3 THE MINELAB GP 3000 THE MINELAB GP 3000 ACCESSORIES INTRODUCING THE MINELAB GP 3000 www minelab com 7 5 3 zZ S Search coils The GP 3000 is supplied with the GP 3000 1100 and GP 3000 1800 coils These coils have been specially designed to take advantage of the new technology and features of this detector In addition to this there are also a number of other size coils will become available in the near future These range from smaller coils which give greater sensitivity to small targets and are lighter and manouverable in heavy vegetation up to larger coils which give greater depth See your Minelab retailer for the full range In some circumstances other Double D and Monoloop coils will work on the GP 3000 however there are limitations which will mean that a number of the new benefits of the DVT will not work properly In some cas
11. may be balancing out the target response from a deeply buried metallic target IDENTIFYING TARGET SIGNALS www minelab com THE MINELAB GP 3000 PROSPECTING TECHNIQUES The GP 3000 has superior ground balancing and it is possible to find quite large objects near the surface in well worked areas where other detectors have been unable to cope with the high degree of mineralisation and or salt Therefore the user should dig all target signals even in previously detected areas Very sudden or large changes in the mineralisation of an area may For Maximum Gold Recovery produce a signal from the detector In the Victorian goldfields a response may be received froma Keep theicoilas close tothe concentration of orange reddish dyke material or clay In the loamy THE MINELAB GP 3000 ground as possible Listen very carefully this is more important than looking SLOW DOWN Do not rush take conditions of Western Australia a pocket of dark orange reddish colouration may produce a sudden signal change If detecting areas of extremely variable mineralisation detecting with the contours rather than across the changes will often stabilise the effect your time In some ground particularly heavily mineralised areas the operator may need to sweep the coil 1 or 2 cm above the ground This should give a more stable threshold and less ground noise Charcoal may sometimes produce sig
12. may be missed after repeated sweeps of the coil MNS 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 Noui Discrimination functions will only work with strong positive target responses Weak responses will give normal all metal type signals CONTROL FUNCTIONS IRON DISCRIMINATION THE MINELAB GP 3000 www minelab com Se Normal Signal P0514 A Louder Figure 5 4 A normal signal on a non ferrous target Disc Ferrous Response Blanking Louder P0514 B Figure 5 5 Discrimination target signal on a ferrous target Iron Discriminate Figures 5 4 5 5 Iron discrimination with the GP 3000 is the silencing or blanking of the threshold which occurs when the detector determines a target is comprised of ferrous metal There is no discrimination when Iron Discrimination is set to All Metal Targets will cause the tone and volume of the threshold to vary These variations convey no consistent information about the type of metal detected Iron discrimination operates when Iron Discriminate is set to Disc Objects must produce sufficiently strong target responses for the detector to successfully discriminate Fortunately most iron rubbish is located near the surface and should produce the required strong signal response Noia When Di
13. target to detect it capia nee wen ee ary to detecting CORRECT Parallel Sweeping Procedure Figure 6 1 7 T ing e The coil should be swept over the ground in a side to side sweeping motion e While sweeping the coil it is important to keep it parallel to and INCORRECT at the same height from the ground at all times Lightly skidding the coil across the ground can sometimes help in this depending on mineralisation Do not raise the coil at the ends of each sweep as this will Pozesa reduce the detection depth and may cause false signals Figure 6 1 Parallel Sweeping DETECTING TECHNIQUES THE MINELAB GP 3000 THE MINELAB GP 3000 DETECTOR SOUNDS www minelab com Threshold and Tone This is the background sound produced by the detector The level is set using the Threshold control The tone of the threshold is set using the Tone control Target Signal E E This is the abrupt change of the tone and volume of the threshold Detecti n ech n l ues sound when a target is detected e The maximum level is set by the Volume control The amount of tone variation is set by the Signal control e Ifthe tone falls first and then rises as the coil is passed Hints and techniques for better detecting over a target this generally indicates a small target and happy prospecting that will help you e Ifthe tone rises first and then falls as th
14. 4 STEP 5 Place the two armrest halves 11 on either side of the upper shaft 8 and ensure that the bolt holes are aligned Slide the two nylon bolts 12 through the bolt holes and screw the nylon wing nuts 13 onto the bolts by a couple of turns Slide the T section on top of the control box 10 into the armrest with the battery plug at the rear Tighten the nylon wing nuts by hand Attach the arm rest straps 14 using the press studs on both sides of the arm rest Push the arm rest straps 14 through the slots in the neoprene arm rest cover 15 and then push the cover over the arm rest 11 COMPLETE ASSEMBLY INSTRUCTIONS User Info This chapter provides a glossary of terminology user guides technical specifications warranty and repair details and troubleshooting tips www minelab com THE MINELAB GP 3000 THE MINELAB GP 3000 Bungy Knuckle 22 Handle with Wrist Strap 9 Bungy Cord 21 P0512 A Figure 2 4 Handle and bungy cord Tear drop Washers 5 Nylon Nut amp Bolt 6 Extreme 1100 Coil 1 amp Skid Plate 3 P0513 A Figure 2 5 The coil pivot end of the lower fibreglass shaft Attaching the handle and bungy cord Figure 2 4 refer also Figure 2 2 sTeP1 Slide the handle 9 onto the other end of the upper shaft 8 and setit to a comfortable position Tighten the two screws in the base of the
15. INFORMATION This chapter provides a glossary of terminology user guides technical specifications warranty and repair details and troubleshooting tips ABOUT THIS MANUAL Discrimination Double D Coils Electromagnetic Field False Signal Ferrous Metals Ground Balance selectable functions knobs amp switches are located on the front and rear panels of the control box The ability of a metal detector to estimate if a located targetis made from ferrous metal iron or steel or non ferrous metal non magnetic Double D coils are coils that have two windings of wire that overlap in the shape of two D s one reversed The characteristics of a Double D coil are stability especially in heavily mineralised ground good depth and sensitivity and a very thorough search pattern Commonly called the signal from the coil An electromagnetic field is generated within the wire windings of the search coil and this field is pulsed or sent into the ground The presence of a metal target in the ground will disturb the pattern of this field and this disturbance is registered by the receive system of the detector and indicated to the operator by an audible target signal beep False signals are signals which sound similar to target signals but are caused by other factors Common causes for false signals are incorrect ground balance hot rocks signals caused by knocking the coil on obstacles etc With experience the operator will
16. IR FORM THE MINELAB GP 3000 Assembly This chapter provides details and instructions on assembling and adjusting the GP 3000 THE MINELAB GP 3000 THE MINELAB GP 3000 UNPACKING YOUR GP 3000 TROUBLESHOOTING Use the following table to check for suggested solutions to problems Table 7 2 Troubleshooting www minelab com 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 Check coil is connected Try testing different coils Random noises Check for other detectors interfering Retune using Tuning button Charge the battery Set Coil to Cancel Re ground balance ee Check for thunderstorm build up pena Battery will not charge using vehicle Check for power to cigarette lighter socket in vehicle The GP 3000 as shipped Figure 2 1 Contents of the GP 3000 pack charger Check 10 amp fuse I charger plug Battery not holding charge Try alternative charger A 11 Double D Coilwith Skid P late and Check power cable Fibreglass Lower Shaft Very noisy threshold Check for interference and re tune Try detecting in a different location Set Coil to Cancel If you need to return your detector to Minelab for service please supply as many details as possible about the fault This will enable
17. SWEEP Figure 6 4 Pinpointing technique Aou Pinpointing will not locate a target in the centre of the coil if operating with the Coil switch set to M Mono or Cancel IDENTIFYING TARGET SIGNALS THE MINELAB GP 3000 www minelab com When charging the battery must be kept in an upright position Do not leave the mains charger on for extended periods because reduced battery life may result BATTERY AND CHARGING The Battery The 6v DC rechargeable battery should provide 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 Itis very important to fully charge the battery before storage Do not leave a battery fully discharged for longer than one day 7 Wp ilol E Never use a 12v DC battery because this would damage the detector This damage is not covered by warranty Low Battery Indication If battery level drops below the desired power to give full function a series of signal pulses are given at 0 5 second intervals Charging the battery step1 Turn the detector Off before disconnecting the battery step 2 Disconnect the battery cable from the detector and connect to the appropriate charger Battery Chargers Two types of battery chargers Mains and 12v Vehicle Charger are supplied BATTERIES AND CHARGING THE MINELAB GP 3000 IDENTIFYING TARGET SIGNALS
18. THE MINELAB GP 3000 Minelab GP 3000 THE MINELAB GP 3000 www minelab com AN IMPORTANT MESSAGE FROM MINELAB We ask YOU as a responsible detector operator to take all due care regarding the environment Minelab cannot stress enough the importance of being responsible when recovering targets BACKFILL EVERY HOLE YOU DIG If 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 treasure hunting This will also ensure that the pristine condition of our beautiful bushland forests and dry land areas is maintained with a minimum of damage Minelab is working with you towards preserving our natural environment so that the benefits of gold prospecting and treasure hunting can continue to be enjoyed in the years to come Every prospector and treasure hunter around the world and the staff of Minelab thank you for your continued efforts towards protecting the environment 7 5 3 r4 S 4901 0036 Version 1 2 P0610 A IMPORTANT MESSAGE FROM MINELAB www minelab com THE MINELAB GP 3000 Minelab Electronics Pty Ltd This document contains proprietary information which is protected by copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Mine
19. ance High Tone Maximum Low Tone P0536 A Figure 4 14 Increased pitch variance Tone Audio P0523 A Figure 4 15 Tone control Signal Pitch Figure 4 12 Adjusts the pitch response of the target signal In Figures 4 13 and 4 14 the curving line represents the high low pitch response to a target The dotted line represents the threshold tone At minimum position the high low pitch variance to a target is reduced e Atmaximum position the high low pitch variance to a target is increased Tone Figure 4 15 Adjusts the tone of the threshold The user may set this to the preferred tone e g the tone at which the operator s hearing is most sensitive At minimum position threshold is set at a low tone Turning clockwise increases the tone to higher pitch CONTROL FUNCTIONS THE MINELAB GP 3000 IRON DISCRIMINATION Discrimination is the ability of a detector to distinguish between different types of metal objects and to assist the user in identifying a target Some goldfields are littered with rubbish e g metal objects which are of little value and are an annoyance to detector users The GP 3000 is capable of rejecting many iron objects while still detecting non ferrous metals The ability of the detector to discriminate ferrous targets means that while detecting in littered goldfields much of the iron rubbish may be ignored with a hig
20. anging the signal processing N Normal may be used in all areas including areas with highly mineralised soil This position has very good sensitivity to a wide range of nugget sizes and is the most versatile of the three positions The Level Adjust control also effects the Tracking mode by altering the detectors perception of what is ground noise and what is a weak target see pages 37 and 38 CONTROL FUNCTIONS The ground contains not only sand but also many different chemicals minerals and salts These extra materials are referred to as ground mineralisation This ground mineralisation may often produce a sound from the detector known as ground noise The GP 3000 has the ability to cancel out the effects of ground mineralisation This minimises ground noise and retains maximum sensitivity to metal targets Cancelling the effects of ground mineralisation is referred to as ground balancing This ensures that target signals from objects such as gold are not confused with interfering ground noise The GP 3000 has automatic ground balancing This continually adjusts to minimise the effects of ground mineralisation when Balance is set to Tracking The GP 3000 may be operated with fixed ground balance or automatic ground balance When Balance is set to Fixed the ground balance remains at the current level e When Balance is changed from Fixed to Tracking the detector beg
21. ard Experiment with known targets to assist in setting all controls to suit your hearing DETAILED OPERATING INSTRUCTIONS
22. attery charger will charge the battery from the cigarette lighter socket of most motor vehicles step 1 Connect the charger to the cigarette lighter socket and turn the ignition switch to Accessories This supplies 12v DC power to the cigarette lighter socket This voltage is converted by the charger to charge the detector battery A red LED indicator will flash while the battery is charging When the battery is flat the LED may flash fast enough so as to appear constantly on As the battery charges the LED will flash at a slower rate sTep2 Leave the battery to charge for approx 10 hours using this charger If the battery voltage of your vehicle drops below 11v the charger will stop operating Therefore the battery charger should not flatten the vehicle battery Check that your vehicle battery is in good condition before camping in remote areas Run your engine above idle speed for at least 30 minutes each day to keep your vehicle battery charged BATTERIES AND CHARGING THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com Covering the search area Figure 6 2 and Figure 6 3 e As the user moves forward slowly the search pattern should resemble a snaking path e To ensure that the ground is thoroughly searched approach the area from 3 different directions iit Overlap each sweep Each sweep of the coil should overlap the area covered by the previous sweep to ensure a fu
23. e coil is passed over a target this generally indicates a large target to utilise the power of your GP 3000 Ground Noise with DVT These are irregular noises that are difficult or impossible to pinpoint when moving the coil over the ground Ground noise is caused by the changing chemistry or mineralisation of the ground When the Balance switch is set to Tracking these effects are greatly reduced Tune Indication An initial beep sounds then while the detector is testing the range of frequencies for the most stable the threshold may become more quiet or chattery Once selection is complete three sharp beeps are given Low Battery Indication If the battery level drops below the desired power to give full function a series of signal pulses are given at 0 5 second intervals DETECTOR SOUNDS www minelab com THE MINELAB GP 3000 DISCRIMINATION CONTROL USING LEVEL ADJUST MIN FULLY ANTI CLOCKWISE Mostiron objects are discriminated but a few small iron objects will be accepted as non ferrous Detect more rubbish but less likely to cancel a gold nugget Suggested for areas with large amounts of ferrous rubbish Only very strong target responses will trigger discrimination action Tracking is more likely to balance out weak target responses A medium to strong target response should pause the tracking mode but weak responses may be mistaken for ground mine
24. een ground balanced the user may select either Fixed or Tracking for detecting If the ground is mineralised or variable use Tracking If the ground is very mild use Fixed and switch back to Tracking temporarily if the threshold becomes noisy Do not test a target by switching to Tracking when the coil is above it Wm it may useful to repeat the ground balance procedure if ground conditions change rapidly GROUND BALANCING THE MINELAB GP 3000 Front Panel Figure 4 16 All Metal Disc Salt Cancel GP3O000 MINELAB Sensitive Double D MO O Level Adjust Tracking Iron Discriminate Soil Coil Balance Coil Connector P0613 A Figure 4 16 Rear Panel Tune Tune Figure 4 17 P0524 A Figure 4 17 Tune control Reduces the effects of electromagnetic interference from sources such as power lines radio transmitters and other metal detectors Automatic tuning is started by pressing and releasing the Tune switch The tuning process takes approx 60 sec and completion is indicated by three sharp beeps CONTROL FUNCTIONS THE MINELAB GP 3000 www minelab com All Metal Q Disc P0525 A Iron Discriminate Figure 4 18 All Metal Disc switch Level Adjust pos2s a Iron Discriminate Figure 4 19 Level Adjust control Sensitive O Sa It P0527 A Soil Figure 4 20 Soil Normal Sens
25. ensitive than Normal or Sensitive to small nuggets Coil Double D M Cancel Figure 4 21 Changes the sensitivity and search pattern of the coil to allow the GP 3000 range of coils to become multi versatile coils with different characteristics to suit different environments This is achieved by altering the pattern of transmit TX and receive RX fields of the coil and how the control box interprets the response Double D can be used in mostareas of medium to very high mineralisation being the most able to cope with ground noise Itis also excellent for pinpointing targets as the response is strongest from the centre of the coil M Mono may be used in mostlocations of low to medium mineralisation and for locating small nuggets with Soil switch set to Sensitive Pinpointing is not centred in the middle of the coil but to one side and may give a complex signal when the target is very close to the coil Cancel may be used in areas with very high electrical interference where the Tune function has difficulty selecting a quiet operational frequency e g near power lines electric fences or under poor atmospheric conditions CONTROL FUNCTIONS THE MINELAB GP 3000 www minelab com Fixed Tracking P0529 A Balance Figure 4 22 Balance Fixed Tracking switch Pinpoint in Cancel will again be to one side of centre and Signals may be complex if targetis close to the coil This setting will l
26. erred to as the Threshold This threshold hum is the background sound made as the detector operates Threshold can be set anywhere between silent and loud but a soft audible level is normally suggested The electro magnetic effect generated by the metal target under the influence of the TX field The audio signal or change in threshold caused by the presence of a metal target as the coil passes across it The function of Automatic Ground Balance where the GP 3000 makes continuous adjustments to the ground balance to compensate for changes in the mineralisation of the ground TX refers to the transmit signals or electromagnetic pulses sentinto the ground by the coil GLOSSARY OF COMMON TERMS 7 g 3 THE MINELAB GP 3000 www minelab com Halo Effect Hot Rocks Interference Mineralised Ground Monoloop Coils Non Ferrous Metals Pinpoint RX 7 5 3 r4 S After a metal object has remained undisturbed in the soil for a considerable amount of time a diffusion occurs around the object This has the effect of the object appearing to the detector to be a larger size A hot rock is an individual rock which has a particularly high degree of mineralisation as compared to the average ground around it Due to this high difference the detector does not have the opportunity to ground balance on the individual rock so therefore gives a false signal Electricity or radio waves in the area be
27. es the use of coils not designed for the GP 3000 will cause the detector to be unstable and noisy Batteries Spare 12A hr batteries can be an advantage especially if travelling into the outback A smaller light weight battery is also available from Minelab This is rated at 4 5A hr and gives approx 3 4 hours running time per charge The weight of this battery is 968g Corporate clothing Minelab also has a range of good quality clothing e g caps shirts and jackets available Ask your local dealer for details ACCESSORIES The Minelab GP 3000 utilises Dual Voltage Technology DVT which is based upon the Bi polar technology used in our military range Here are some features of the GP 3000 e NEW Low Noise circuitry e NEW battery harness NEW Smart Point diagnostic port e DVT technology for optimum depth and sensitivity in all soil types e Long life 12A hr Gel Cell battery Selectable Tx transmit modes Soil Switch for optimum performance in different soil conditions Selectable Rx receive modes Coil Switch for greater sensitivity and less susceptibility to interference e Heavy Duty Bungy Strap Like its predecessor the GP extreme the GP 3000 can handle heavily mineralised and salty ground conditions with greater ease than previous detectors which effectively opens up NEW detecting areas The new Low Noise circuitry found in the GP 3000 results
28. et Level Adjust to the middle of its range step 15 Setthe Ground Balance by moving the coil up and down While coil is in motion change Balance switch from Fixed to Tracking step 16 Once ground balance has been acheived switch back to Fixed step 17 The detector is now ready for operation QUICK START INSTRUCTIONS EASY REFERENCE Take time to read this manual thoroughly to obtain the best performance from your new GP 3000 detector Turn the GP 3000 On Hold the coil away from the ground and metal objects and switch Power to On Noia When the GP 3000 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 Setthe Volume by passing the coil across a large target and adjusting volume to a comfortable level Now testa very small target at this level Set the Threshold control Adjust the Threshold control until the threshold is just audible through the headphones 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 he
29. h probability that valuable targets will not be missed Double D Coil Ground Surface lt gt Audio Blanking Blanking Normal Audio Normal Audio l l Ferrous Non Ferrous Disc mode 2 Ferrous Target signal blanks as coil passes over target Target Signal P Non Ferrous Signal is more steady as coil passes over target NOTE The above zoning is only a stylistic example of how the Discrimination mode works The above areas are not determined by depth but by the strength of signal P0507 A P0507 A Figure 5 3 Discrimination levels IRON DISCRIMINATION www minelab com THE MINELAB GP 3000 i 20 100mm P0506 A Figure 5 2 Setting the ground balance Ground Balancing Procedure Figure 5 2 Move the coil up and down between 20mm and 100mm above the ground and while moving the coil change Balance from Fixed to Tracking The fast ground balance takes only 5 sec after switching to Tracking Therefore it is important to be moving the coil as the Switch is changed Keep moving the coil until all ground noise has stopped A persistent signal may indicate a target in the ground e If this occurs then move the coil to a new location and repeat the procedure e When there is no longer a change in the threshold while the coil is being raised and lowered the detector is ground balanced When the detector has b
30. hallow boosts signals from small targets close to the surface This makes faint target signals easier to hear This setting may also boost any ground noise therefore Shallow is well suited for quiet ground conditions Deep may be used when searching for large targets atdepth This smooths the threshold and target signals from small targets making small changes in threshold easier to hear Selection of the more suitable position should be after considering both target size depth and ground conditions Nozi When Boost is changed Threshold may also need to be adjusted External amplifiers may be used in addition to the Boost switch provided that they have loudness limiters built in This prevents loud signals becoming unpleasant or dangerous to the user s hearing DETAILED OPERATING INSTRUCTIONS THE MINELAB GP 3000 Normal Cancel Pos2s a Rx Figure 4 21 Rx Receive switch Sensitive may be used when searching for small nuggets especially in areas with highly mineralised soil The extra Stability allows the coil to be used closer to the ground in areas of excessive ground noise Sensitive may not work well if the ground is salty This setting may also reduce the depth at which large nuggets are likely to be found Salt may be used in areas containing high salt content be they neutral or heavily mineralised In highly mineralised areas without salt this setting may be less s
31. handle with a small flat tipped screwdriver to hold the handle in position sTep2 Slide the bungy cord knuckle 22 of the bungy cord onto the upper shaft 8 Assembling the Intermediate and Upper shaft sections Figure 2 5 refer also Figure 2 2 sTeP1 Slide the intermediate shaft 7 into the end of the upper shaft 8 and snap into place step2 Check that the coil 1 has a skid plate 3 attached step3 Check that the coil pivot end of the lower fibreglass shaft 4 has two teardrop washers 5 installed Nozi The washers should always be full thickness and should be replaced regularly as they wear out and allow the coil to become loose step4 Push the lower fibreglass shaft 4 into the mounting brackets on the coil and ensure that the spring clip at the rear of the fibreglass shaft faces the rear of the coil Attaching the coil Figure 2 5 step1 Line up the holes in the coil with the pivot end of the fibreglass shaft 4 step2 Push the nylon bolt through the holes and fit the nylon wing nut then tighten by hand Noli Do not over tighten the nut as the coil housing may be crushed or damaged COMPLETE ASSEMBLY INSTRUCTIONS www minelab com THE MINELAB GP 3000 HINT If the coil cable is able to move around especially near the coil it will be seen by the detector and cause random noises which may be confusing Use only the 6v DC battery Supplied Attaching t
32. he lower fibreglass shaft THE MINELAB GP 3000 Figure 2 2 sTEP1 Slide the lower fibreglass shaft 4 into the intermediate shaft 7 step2 Adjust shaft length and coil angle for a comfortable position Minelab recommends that the shaft length be set to give a comfortable sweep length of approximately 2 meters The lower fibreglass shaft can be set into position by locating the Spring clip into the holes provided in the intermediate shaft and hand tightening the locking nut at the end of the intermediate shaft Securing and connecting the coil cable Noia Always ensure that the control box is turned off completely before connecting or disconnecting the coil step1 Wind the coil cable around the shaft and plug the coil connector into the coil socket on the control box Check that the cable is wound firmly around the shaft without strain leave enough slack at the bottom of the cable near the coil to allow for adjusting the angle of the coil without placing strain on the coil cable step2 Fasten the cable into position using the Velcro straps provided 20 Fitting and connecting the battery pack Figure 2 6 step1 Fit the battery 17 into the back pack pouch 18 sTep2 Connect the headphones 16 and the power cable 19 to the appropriate sockets in the cap of the battery step3 Puton the back pack 18 COMPLETE ASSEMBLY INSTRUCTIONS Salty Environments The GP 3000 will find objects at greater
33. he sun for longer than is necessary Shading will help protect it Do not leave the detector in a closed vehicle especially in the sun The coil housing will eventually wear through if you scrub the ground with it while searching Use ofa replaceable skid plate will help to protect your coils To prevent dirt entering between the coil and the skidplate silk tape e g Leukosilk which is available from chemists may be used The use of some other tapes e g insulation tape may result in some loss of sensitivity The control box and coil should notcome into contact with petrol or other oil based liquids If any partof the detector comes into contact with corrosive substances including salt or salt water itshould be washed with fresh water Clean the detector with a damp cloth using a mild soap detergent Do not use solvents DETECTOR CARE AND SAFETY 7 g 3 THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com INTRODUCTION siciscs iiss tics Sdseacdesicdicacctciveaien tonne cobtintdeiina marcas ade ee is 1 ADOUEUNIS MANU All 2st sicdeneteAeatineteisntenstntertnatt sensei citnadisnta tiatiartasel a a Introducing the Minelab GP 3000 ASSEMBLY na eaaa net ttl EEEE NE EEE 5 Unpacking your GP 3000 easy reference ssssssssssrssssssesersrerrrrrrrrrsrrsssnsnnnnnnnnnnnnntertrnrrrrnrnnnnnnnnns 6 List of pre assembled sections and Parts sssssessssesssseesesseessesseessesssesses
34. imit sensitivity to deep targets Noia Coils not specifically designed for the GP 3000 may behave erratically or be ineffective in either M Mono or Cancel modes Minlab Monoloop coils can be used on the GP 3000 with excellent results When using a Monoloop coil on the GP 3000 we would recommend you operate the coil switch in M mono position Balance Fixed Tracking Figure 4 21 The GP 3000 may be operated with fixed ground balance or automatic ground balance When Balance is set to Fixed the ground balance remains at the current level e When Balance is changed from Fixed to Tracking the detector begins to automatically ground balance through a two stage process that is described on page 33 To obtain the best performance from your detector it is important to know how different ground conditions affect the detecting process See Ground Balancing on page 33 for more detailed information THE MINELAB GP 3000 Tune 60 beep beep beep P0517 A Figure 5 1 The tuning process When tuning detector in close proximity to other detectors each operator needs to take turns tuning Do not try to tune two detectors at one time M Mono changes the way the coil transmits and receives its signals Operating in mono the coil has some of the characteristics ofa Monoloop coil Use of Mono will often increase the sensitivity of the detector but may als
35. ing detected can cause instability or chattering of the detectors threshold The types of interference commonly occur due to power lines underground cables radar other detectors or climatic conditions like thunderstorms Most ground contains certain minerals which can cause false signals to be given by a detector Heavily mineralised ground requires different ground processing than does neutral or lightly mineralised ground see Ground Balance Ground containing heavy salt concentrations require entirely different processing again see salt Monoloop coils are the style of coil where the multiple strands of wire are wound in a single loop around the circumference of the coil The field of search of Monoloop coils tend to be cone shaped Metals not containing significant levels of iron Non ferrous metals are non magnetic such as Gold Silver Copper Brass Lead or Aluminium The method of locating the precise location of a target prior to digging Pinpointing uses the design of the search coil windings to determine the exact position of the detected target RX refers to the response or electromagnetic field which is received back by the coil and is used by the control box circuitry to detect a metal item in the ground GLOSSARY OF COMMON TERMS THE MINELAB GP 3000 Introd uction The GP 3000 incorporates new technological advances and control functions which have resulted in a detector that combi
36. ins to automatically ground balance through a two stage process The first stage is a very rapid adjustment to the ground mineralisation This only lasts for 5 sec so coil movement should be at the same time as Balance is changed from Fixed to Tracking The second stage continues to adjust to the ground mineralisation but at a greatly reduced speed This adjustment continues all the time that Balance is set to Tracking 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 an object and it may be balanced out For this reason Balance should be changed to Fixed when pinpointing a target GROUND BALANCING www minelab com THE MINELAB GP 3000 Sometimes it may not be possible to remove the effects of interference completely by using the Tune control alone Once the detector has been tuned for a particular location itshould not require readjustment unless conditions change or new interference is introduced e g other detectors being used in the same area Ifthe interference persists after tuning consider using the Coil switch set to Cancel position Boost Shallow N Deep Boostselects the type of processing and filtering applied to the detector signals N Normal may be used for general detecting conditions This does not boost any signals S
37. ite diea seid ivedchesiecead aaa ia aa aa An important message from Minelab v ccscsssssesssssessssessessssneesessessssessessessesssessssssessesssessessusesneesnee USER INFORMATION ccsccscsscsessssesessesnssesnssesnsecsneecsneesesensensneeseaseseaseaeaneneaneneanensanensanes Technical specifications for the Minelab GP 3000 sssssssssseseesessesssseessseessesresesssessesssessessseess Troubleshooting ernan aa a deleevharied dh oshleaniaaeied delish ant adien Salt Search Coil Search Pattern Threshold Target Response Target Signal Tracking The presence of high salt content in the ground being searched will have a similar but different effect on the metal detector ground balance as does mineralisation Salt contentcauses a negative response rather than the positive response oflaterite soils The detector needs to therefore use differentfiltering techniques to overcome this effect The search coil is the circular plate which is swept across the ground surface during detecting It transmits electromagnetic signals into the ground and receives the response The search pattern is the area of ground underneath the coil which is being scanned Depending on the style of coil Double D or Monoloop and the Coil mode being operated in Double D M Cancel different coils will have a different shaped area being covered by each sweep The continuous audible level of sound emitted by the detector is ref
38. itive S alt switch Iron Discriminate All Metal Disc Figure 4 18 Selects between discrimination or to turn off the discrimination altogether All Metal In All Metals the detector will give varying volume and pitch Signals but this information does not indicate the type of metal in the object In Disc a strong response from a ferrous iron object will cause the threshold to be blanked or silenced Xoi If the target response is too weak for accurate discrimination the detector will give a normal target signal Level Adjust THE MINELAB GP 3000 GROUND BALANCING Figure 4 19 Level adjust gives the user the ability to select the sensitivity and likelihood of a target being ferrous or non ferrous It also affects how the detector recognises mineral effects in the ground as opposed to metal targets when ground balancing Noi lt is important that you read pages 37 and 38 in Chapter 5 for more information Soil Normal Sensitive Salt Use Tracking in areas with very high ground noise for best results If Balance is changed to Fixed the detector will no longer adjust to changes in ground mineralisation but will stay fixed at the level previously calculated while in Tracking mode Change from Tracking to Fixed when pinpointing a potential target Figure 4 20 Optimises the detector for different soil conditions and targets by ch
39. lab Electronics Pty Ltd 118 Hayward Avenue Torrensville SA 5031 Australia WARNING This document contains Minelab Electronics Pty Ltd rights technical data or restricted rights data or both Patents and trademarks apply Since there may be a range of options available in this detector type equipment may vary according to the model or items ordered with your detector Certain descriptions and illustrations may differ in this manual from the exact model that you purchased In addition Minelab reserve the right to respond to ongoing technical progress by introducing changes in design equipment and technical features at any time THE MINELAB GP 3000 DETECTOR CARE AND SAFETY The GP 3000 is a high quality electronic instrument It has been designed for professional gold prospecting use and the electronics circuitry is encased ina rugged housing Take care of your detector in the following way Keep the detector clean and dry Itis very important to keep all electrical connectors clean and dry The control box is not waterproof even though ithas been designed to be water resistant Take care to avoid it becoming wet The coil is water resistant and may be used in rain or wet conditions The coil is not waterproof Do not immerse the coil in water Regularly replace such items as teardrop washers and skidplates to give long life to your detector Do not expose the detector to high temperatures or leave it in t
40. ll coverage of the area being searched Be aware of the search pattern of the coil being used and overlap sweeps to take this pattern into account See also Pinpointing Technique pages 43 and 44 P0531 A Figure 6 3 Search area from 3 directions DETECTING TECHNIQUES THE MINELAB GP 3000 THE MINELAB GP 3000 DETECTING TECHNIQUES Check your footwear Some user tips e The battery should be worn in the backpack supplied This places the battery atthe furthest practical distance from the coil www minelab com e Ensure that you do notset the shaft length too short Ifthe coilis too close to your body it might detect your pick the Note When detecting do not wear battery or any other metal which you are carrying If false signals are occurring as you sweep the coil check that they are steel cap boots or shoes with not produced by any metal that you are carrying metal eyelets Move the coil closer and then further away from your body in order to check if the signals are coming from items such as your pick or battery If they are you must increase the distance between the coil and these items It is important to familiarise yourself with the features of the GP 3000 control Motion detection panel A few minutes spent reading this The GP 3000 is a motion detector Therefore the h r will worthwhile prelimin detector must be moving over a
41. ll need to re ground balance every time you select a new position for either the Soil or Coil switches Set the Tone control THE MINELAB GP 3000 Adjust the Tone control until the threshold is at a comfortable tone for your hearing 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 NNR Setting Tone to a high pitch may be more fatiguing but is more suitable for identifying the faintest target signals Set the Signal control The human hearing is sensitive to changes in tone so the operator is more likely to hear a target signal when both the volume and the tone change rather than volume alone The Signal control gives the operator the ability to choose between a targetsignal thathas a large variance of tone or one which has less variation High variance can give the operator more signal definition to interpret however in highly mineralised ground this high variance of signal may cause confusion and a lower Setting is preferred Soil switch Use this switch to optimise the detector s ability to detect in different ground conditions see page 24 for full description Coil switch Selection of different positions of this switch changes the electromagnetic field of the coil thus giving better performance in certain environments see page 25 for more information
42. mbly D Headphones Coil Double D M Cancel 3 pos switch l 1 Duble yea Be BPE pnan Taneadphones Balance Fixed Tracking 2 pos switch 2 Coil Cable 9 Handle with Wrist Strap E Battery and Battery Pack 7 3 Skid Plate 10 Control Box 17 Battery Audio Output 6 35mm 1 4 headphone socket 4 Fibreglass Lower Shaft 11 Armrest Parts 2 Headphones Supplied 5 Nylon Nut amp Bolt 12 Nylon Bolt 2 ATER F pee NY 19 Battery Power Cable 5 Coil standard Extreme 1100 Double D 6 Teardrop Washers 13 Nylon Nut 2 5 F Extras a Extreme 1800 Double D B Intermediate Shaft Assembly 14 Arm Straps 2 l 15 Armrest Cover 0 Velcro Cable Straps 3 Battery 6VDC 12A hr sealed lead acid 14 15hrs 7 Intermediate Shaft 21 Bungy Cord Patents Apply 22 Bungy Knuckle Note In the interest of product improvement Minelab reserves the right to make changes without notice Figure 2 2 Pre assembled sections and parts list TECHNICAL SPECIFICATIONS PRE ASSEMBLED SECTIONS THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com c Nylon Bolts 12 a Armrest Parts 11 Nylon Nuts 13 Figure 2 3 Armrest assembly COMPLETE ASSEMBLY INSTRUCTIONS You will need to assemble the GP 3000 from all the various components here are detailed assembly instructions Assembling and fitting the armrest Figure 2 3 refer also Figure 2 2 STEP 1 STEP 2 STEP 3 STEP
43. nals similar to a metallic object when close to the surface Charcoal is usually created by farmers burning off tree stumps or by bushfires When the charcoal under the surface is disturbed the signal will vanish If in doubt scrape away some soil above the suspect signal if the signal gets stronger itis likely to be a target Dig it PROSPECTING TECHNIQUES The Vehicle Battery Charger is designed for use with vehicles 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 will cause the fuse in the cigarette lighter plug to blow and the LED indicator will not light Mains Battery Charger The mains battery charger will charge the battery from local mains AC power outlets step1 Connect the mains charger to a mains outlet step2 Switch the mains outlet on Check the charger nameplate it should be rated at500mA orl000mA The 500mA charger will recharge a completely flat battery in approximately 20 hours The 1000mA charger will recharge a completely flat battery in approximately 10 hours Partially discharged batteries require a shorter period to recharge Allow approximately 1 5 to 2 hours charging for each hour the battery was in use if using a 500mA charger and about 0 5 to 0 75 hours for each hour usage on a 1000mA charger Vehicle Battery Charger The vehicle b
44. nes stable and effective ground balancing with depth and sensitivity THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com ABOUT THIS MANUAL GLOSSARY OF COMMON TERMS This manual is designed to introduce the detector s features It gives you step by step Control Box The control box encloses the electronic circuitry of the detector The directions for everything from assembling and adjusting your detector to basic and control box originates the TX transmit signals sent by the coil and advanced detector use interprets the RX receive signals detected by the coil All user 1 3 1 INTRODUCTION Basic overview of the GP 3000 and this User s Manual 2 ASSEMBLY This chapter provides details and instructions on assembling and adjusting the GP 3000 3 BATTERY The GP 3000 is powered by a rechargeable battery pack This chapter provides details on battery installation use and performance 4 CONTROLS This chapter is designed to familiarize you with the various features of the GP3000 control panel A few minutes spent reading this chapter will be a worthwhile preliminary to basic or advanced detecting 5 DETECTOR OPERATION However experienced you are at using a metal detector it is important that you read this 6 DETECTOR TECHNIQUES Once you are comfortable with the basic detector use there are a few techniques you should be aware of 7 USER
45. o be a little more unstable in heavily mineralised ground Pinpointing will be off to the left of centre 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 detect close to suburbia or under power lines etc Set the Tune control Figure 5 1 Tuning 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 detector again e Hold the detector at waist height and the coil vertical Keeping the coil vertical slowly move it through a half circle around your body e Listen for an increase in interference as you move the coil When the interference is loudest stop moving the detector hold it motionless in that position and momentarily press the Tune switch The detector will then scan through the available range of transmission frequencies and automatically select the frequency that results in the greatest reduction of noise from electromagnetic interference e The end of tuning process which takes approx 60 sec is announced by three beeps While the detector is selecting the preferred cy the coil must be kept motionless and clear of metal objects DETAILED OPERATING INSTRUCTIONS www minelab com THE MINELAB GP 3000 You wi
46. our service engineers to rectify the fault quickly and efficiently Retum the detector in a cardboard box for protection along with 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 7 g 3 UNPACKING YOUR GP Extreme TROUBLESHOOTING THE MINELAB GP 3000 THE MINELAB GP 3000 www minelab com TECHNICAL SPECIFICATIONS ASSEMBLY AND LIST OF PARTS The GP extreme Table 7 1 Technical specifications Length Maximum 1300mm Minimum 1100mm Arm Strap 14 Weight Complete with 11 coil 24009 Battery 17 amp Armrest cover 15 exluding battery Battery Pack 18 Configuration Shaftmount Transmit F req Bi level Pulse Induction OaE E Technology Dual Voltage Technology DVT iecti j Velcro Cable Ground Rejection Automatic ground balance Sere 0 n Search Mode Motion detector mee SaR Controls Power On Off 2 pos switch Tear drop Washers 5 Boost Shallow N Deep 3 pos switch Nylon Nut aac SO S Fibreglass Nylon Bolts 12 at Threshold 1 turn control Lower Shah 4 Menken al Volume 1 turn control Signal 1 turn control Nylon Nuts 13 Tone 1 turn control Penden 1 Loh Tune push switch Level Adjust 1 turn control Iron Discriminate All Metal Disc 2 pos switch Ne R Si switch A Lower Shaft Assembly C Upper Shaft Asse
47. ralisation MAX FULLY CLOCKWISE Almost all iron objects are discriminated but a few small non ferrous items will also be ignored Detect less rubbish but may mistake a nugget for ferrous rubbish Suggested for areas with small amounts of ferrous rubbish Both strong and medium target responses will trigger discrimination action Tracking is less likely to balance out weak target responses A weak target response should pause the tracking mode IRON DISCRIMINATION THE MINELAB GP 3000 CONTROL FUNCTIONS There are two control panels the rear panel and the front panel Rear Panel Figure 4 1 yf MINELAB All Metal Sensitive Double D Fixed Level Adjust Disc Salt Cancel Tracking Iron Discriminate Soil Coil Balance Coil Connector P0613 A Figure 4 1 Rear Panel off Power On Off Figure 4 2 Q This switch turns the power from the battery to the detector On On Pos18 a and Off Power Always switch the detector Off before connecting or Figure 4 2 Power On Off switch disconnecting the coil or battery pack and when not in use CONTROL FUNCTIONS www minelab com THE MINELAB GP 3000 THE MINELAB GP 3000 Shallow Or Deep P0519 A Boost Figure 4 3 Boost switch Threshold nico Audio Figure 4 4 Threshold control Target Target a D Y Audible Signal 9 No Sound Too High P0509 A
48. sc is used small or deeper targets whether ferrous or non ferrous will produce a normal target signal Ifa target response is too weak for the detector to discriminate it will internally change to the all metal mode As soon as the target response becomes strong enough the detector will resume discrimination Pinpointing is best performed using All Metal Ns When a target has been located using Disc the coil should be rapidly passed back and forth over the target centre several times Remember to set Balance to Fixed for this The coil should always be passed smoothly over the surface of the ground while maintaining the coil height above the ground This is especially important when attempting to discriminate a target Noia Discrimination will give the best results when used in combination with the specially designed GP 3000 coils When detecting a piece of iron a normal target signal should be heard until the detector determines that the object is ferrous At this point the signal will blank The strength of the target response required for discrimination to occur may be altered by using Level Adjust IRON DISCRIMINATION THE MINELAB GP 3000 Small Target Large Target Audible Signal No Sound Louder Just Right P0533 A Figure 4 7 Threshold control just right Volume P0521 A Audio Figure 4 8 Volume control i g a Maxim
49. ssessesssesssssssessssessseesneesneanees 7 Complete assembly instructions sccscssessessesssessesssesssssssesessssssneessesssesnessesnesseessesseessesssessesssessessssasesses 8 BSA TIEIAY osc ses cases E N E A E E E E casescuenecutapavstes 13 Battery and CM aN OU NG ais iini inaa EAA T AAA ARAA TNN 14 CONTROL S oara EE A EOE EAA AA 17 Detector Sounds easy referenCe i islet sateedisend i e a E woiatlany 18 Control functions rear panel Control functions front panel OPERATION 3 cncccsiccccsccccecuccecucececcec ce cect ANEAN RAAEN secu cece secu sc cS gsoul occ A A RR Quick start instructions easy reference Detailed operating inStruCtiOnS c sssssssssssssesessscsssseesessssssssssessesssessssseesuesseesesseesuessecssessesssessesssesseeess GrOUld DAlANGING sins cciicdiscdmeiiin tite Hila ON a R ON aad cuane IFON CISCHIMMIMALION umean titi t casateavien ccnstan ansts E a A Level Ajust Control 7 5 3 zZ 8 www minelab com THE MINELAB GP 3000 THE MINELAB GP 3000 TABLE OF CONTENTS Gi DETECTING TECHNIQUES onrar mpini sE Det cting ethnig ES a lhl td i a ari lll Prospecting techniques Identifying target signals Recovering the target a aa tenwcnet sede iewitad ao dh aanciedluennend tented When een Mie Service repair form Waranty ioiii i a aaa aaa aaia a Accessor ES varani aaa Aaa aa Glossary of COMMON ter MS spaaouiniin ei ENA NE A D teCtor carerandiSafety cic iicssvicdiceiveed C
50. tput becomes audible signals cannot be heard if they are below the dotted line If the threshold level is set too high then small variations in audio Signal might not be discernible above the threshold level Figure 4 5 An example of this would be to hear a whisper within a crowded noisy room Level Adjust Control Level Adjust gives the user the ability to select the sensitivity and likelihood of a target being discriminated as ferrous when used in the Disc mode This may also affect how the detector responds to ground mineralisation compared to metal targets when used in Disc Mode There is usually some overlap between signals from useful targets and some types of iron rubbish The user may set Level Adjust to select the amount of discrimination between two extremes Fully anti clockwise All targets detected but some iron will give a normal signal as per Figure 5 4 Fully clockwise Little iron detected but some small non ferrous targets potentially mistaken as ferrous Turning the control anti clockwise increases the strength of a signal required for iron discrimination to be activated The Level Adjust also affects the Tracking mode When set fully clockwise it is unlikely the detector will balance out genuine targets but some ground noise may still give false signals When set fully anti clockwise the detector will balance out ground noise effectively but some faint weak target signals
51. um P0508 A Figure 4 9 Maximum volume Mid range P0534 A Figure 4 10 Mid range volume L 5 E E te ___Minimum P05035 A Figure 4 11 Minimum volume If the threshold level is set too low there is no audible background Signal and small target signals will not go above the threshold of audibility Figure 4 6 iam A soft audible headphone signal which is comfortable to listen to for extended periods is recommended Figure 4 7 Volume Figure 4 8 Sets a maximum limit on the loudness of the target signal obtained from a large target Refer to Figures 4 9 4 11 The dotted line in these figures represents the level of volume set by the volume control Ifthe Volume is set to maximum fully clockwise the target Signal is unaltered and proportional to the target size and depth see Figure 4 9 Ifthe Volume control is turned down to half way the target signal is unaltered for a small target but is limited for a bigger target see Figure 4 10 e Ifthe Volume were to be turned down close to minimum it potentially will limit all signals to such a degree that most targets will be lost see figure 4 11 Noli Threshold should be reset after adjusting the Volume level CONTROL FUNCTIONS www minelab com THE MINELAB GP 3000 Signal P0522 A Audio Figure 4 12 Signal control High Tone Low frf Minimum Tone P0510 A Figure 4 13 Reduced pitch vari
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