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Ground Balance Procedure for Fixed

For Ground Balance type General.

Find a clear area of ground without any targets.

Change the Ground Balance switch to Fixed.

Whilst keeping the coil parallel to the ground, practise

raising and lowering the coil between 25mm and 100mm (1”
and 4”) over the ground. Try to lower the coil as close to the
ground as possible without touching it.

While moving the coil press and hold the Quick-Trak button.

The Tracking program initiates a very fast Ground Balance for
a short time.

Note:

This is the same effect as changing the Ground

Balance switch to Tracking on the front panel.

Continue moving the coil up and down until the ground

noise has stopped. When there is no longer a change in the
Threshold the detector is ‘Ground Balanced’.

Note:

A persistent signal may indicate a target in the ground.

If this occurs, then move the coil to a new location and repeat
the procedure.

Release the Quick-Trak button to return to the Fixed position

and commence detecting.

100mm (4”)

Содержание GPX 4800

Страница 1: ...Instruction Manual...

Страница 2: ...raising and lowering the coil between 25mm and 100mm 1 and 4 from the ground change the Ground Balance switch to Tracking p 40 Any variations in the Threshold will smooth out within 3 5 seconds Adjust...

Страница 3: ...any previous detector This manual is designed to help both the beginner and expert prospector get the best performance out of their GPX 5000 and GPX 4800 Minelab wishes you every success in your ques...

Страница 4: ...nterference Auto Tune Threshold Adjusting the background audio level Soil Timings Optimising for soil and target types Coil Rx Changing transmit Tx and receive Rx fields Ground Balance Compensating fo...

Страница 5: ...d Stabilizer Signal Peak Adjusting the pitch variation of target signals Target Volume Response Inverting the pitch of the target signal Tracking Speed Keeping up with changing ground Iron Reject Iron...

Страница 6: ...c rocks and soils Through a process of dynamic noise compensation SETA ensures that the threshold stability is improved and maintained allowing you to operate the GPX 5000 and GPX 4800 with maximum ef...

Страница 7: ...The Rx Gain function sets the overall sensitivity level of your detector In areas where soil conditions are mild you can increase the Rx Gain In areas that are more difficult Rx Gain can be reduced Mo...

Страница 8: ...6 List of Parts Battery Harness Lower Shaft 11 Coil Upper Shaft Control Box Armrest 2 sections Bungy Cord Clamp Bow Knuckle with Bolt and Wingnut Bungy Cord...

Страница 9: ...le Lithium ion Battery Headphones Instruction Manual Warranty Card Armrest Bolts Armrest Wingnuts Armrest Straps Armrest Cover Vehicle Charger Adaptor Velcro Tabs Lower Shaft Washers Lower Shaft Bolt...

Страница 10: ...ft 2 Ensure that the spring loaded pin of the lower shaft is pointing downwards Slide the lower shaft into the bracket on top of the coil 3 Insert the bolt through the lower shaft and the bracket on t...

Страница 11: ...the twistlock counter clockwise to clamp the lower shaft and prevent movement Attaching the Handle to the Upper Shaft 1 Slide the bungy cord clamp onto the upper shaft 2 Slide the handle onto the upp...

Страница 12: ...ver 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 con...

Страница 13: ...allow the angle of the coil to be adjusted while detecting 2 Use the velcro straps to secure the coil cable to the shaft 3 Plug the coil connector into the coil socket on the control box firmly tighte...

Страница 14: ...ery harness pouch 2 Connect the headphones and the power cable to the appropriate sockets in the battery Note The illustration shows the battery orientated for a user holding the detector with their l...

Страница 15: ...level accordingly See wiring diagram below for correct speaker to audio jack wiring Note After market accessory boosters may not operate in conjunction with this built in amplifier However the detecto...

Страница 16: ...Fitting the Battery Harness 1 Thread your arms through the harness so the battery pack sits on your back 2 Clip the waist and chest buckles together For more detail see Adjusting the Detector for Comf...

Страница 17: ...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 wingnut 5 Clip the bungy cord onto one of the harness s...

Страница 18: ...table position Adjusting the Length of the Lower Shaft If the coil is too far from your body it will be difficult to balance and manoeuvre while detecting If the coil is too close to your body it may...

Страница 19: ...different loops on the waist belt Adjusting the Bungy Cord Clamp Bow Knuckle The correct position of the bungy cord clamp bow knuckle along the shaft can help take the weight of the coil Loosen the cl...

Страница 20: ...time you are not detecting Note Some after market coils can drain the battery at a higher rate which may reduce your operating time by up to 30 Tip A spare battery is available as an accessory If trav...

Страница 21: ...harging These conditions should be avoided wherever possible to minimise capacity fade and obtain optimum cycle life Minelab detectors shut down at a certain minimum voltage of the battery in order to...

Страница 22: ...ver 50 C 122 F and will not charge Disconnect the battery and wait for it to cool below 40 C 104 F in a cool place before reconnecting Continuous orange blinking The first phase of charging has timed...

Страница 23: ...harge the battery at temperatures above 45 C 113 F Do not charge the battery at temperatures below 0 C 32 F Do not leave the battery in hot conditions e g on the dashboard of your car or rear parcel s...

Страница 24: ...tion in coil height at the end of each swing may cause confusing sounds and reduce detection depth an even flat sweep is desirable Practise sweeping the coil over the ground in a side to side motion w...

Страница 25: ...ill not be target signals but signals caused from the surrounding environment The GPX Series have a Tune p 31 function to overcome electrical interference Ground Noise Certain minerals may cause the d...

Страница 26: ...of searching Search Modes can also be customised to suit different detecting conditions Soil Timings p 35 allows you to change the electronic pulses timings of the detector to optimise performance for...

Страница 27: ...p 50 Function Select p 48 scrolls up or down through the list of functions Setting p 49 Once a function has been selected Setting allows you to adjust its value On Off p 26 turns the detector on and...

Страница 28: ...rload sound move the coil away from any large metal objects Overloading is not harmful to the electronics of the detector The On Off switch is located on the Rear Control Panel To turn the Detector On...

Страница 29: ...versal functions and they apply to all Search Modes The functions listed under the currently selected Search Mode for example General as pictured are specific settings applicable to that selected Sear...

Страница 30: ...sonal preferences to suit different detecting conditions General The General Mode will provide the best compromise of sensitivity stability depth and signal response under a variety of conditions For...

Страница 31: ...each of the Search Modes can be saved with different settings The functions for each of the Search Modes can be saved with different settings Note The Custom Search Mode switch position provides acces...

Страница 32: ...detecting faster seeking a first nugget that may indicate a new area worthy of further investigation Hi Mineral See p 28 for description Hi Trash This mode has factory presets specifically selected fo...

Страница 33: ...ting via the LCD menu allows you to manually select and listen to every channel for the least interference The best channel to select will be the one where the audio response to electromagnetic distur...

Страница 34: ...ill take up to 60 seconds The detector will select the quietest operating channel identified The end of the Tuning process will be indicated by three sharp beeps Note When tuning the detector in close...

Страница 35: ...s or large deep targets may not produce a distinct target signal but may cause only a small variation in the Threshold If the Threshold level is set too high or too low these very small variations may...

Страница 36: ...faint target signals to be heard Threshold level Audio Range that you are able to hear Faint signal Very loud signal Faint signal now inaudible Loud signal audible Threshold Audio Ran you are ab Audio...

Страница 37: ...conditions Normal Normal gives you the best performance on a wide range of soil conditions and it will provide the best depth on a wide variety of target sizes It works particularly well with Double...

Страница 38: ...d by Minelab may behave erratically or be ineffective in either the Mono or Cancel positions Cancel Mono Double D Cancel Mono Double D Coil Rx Changing the transmit Tx and receive Rx fields of a Doubl...

Страница 39: ...complex signal when the target is very close to the coil It is recommended you use the left edge of the coil to pinpoint shallow targets Cancel This setting provides a receive field that is particula...

Страница 40: ...or ground mineralisation and compensates for it thus reducing ground noise This ensures signals from targets such as gold nuggets are not confused with ground noise The GPX 5000 and GPX 4800 can be op...

Страница 41: ...sensitivity and only use Tracking in areas with excessive ground noise and or rapidly changing mineralisation often referred to as variable ground Quick Trak Button The Quick Trak button found on the...

Страница 42: ...cking and continue moving the coil up and down until the audio has stabilised and any ground noise has stopped Note A persistent signal may indicate a target in the ground If this occurs move the coil...

Страница 43: ...y you can select a Faster Tracking speed Three Tracking speed options p 70 are available from the LCD menu Note In highly variable ground the Tracking may not instantly update the GB setting when you...

Страница 44: ...press and hold the Quick Trak button The Tracking program initiates a very fast Ground Balance for a short time Note This is the same effect as changing the Ground Balance switch to Tracking on the f...

Страница 45: ...own to have produced gold nuggets run in Fixed Ground Balance and periodically re Ground Balance with the Quick Trak button every few metres When Ground Balancing in very rocky terrain lower the coil...

Страница 46: ...preserved This is to prevent your own favourite mode settings from accidentally being erased whilst allowing the LCD menu Deep Mode and General Mode settings to be quickly restored to factory setting...

Страница 47: ...you wish to restore to Factory Presets 3 Press the On Off switch down and hold until the Reset Defaults menu appears approximately 5 6 seconds 4 Turn Function Select to the right to select the Search...

Страница 48: ...ific Functions Function Range General Deep Hi Mineral Motion Very Slow Slow Medium Slow Very Slow Medium Rx Gain 1 15 8 9 6 Audio Type Quiet Normal Deep Normal Deep Normal Audio Tone 1 100 50 38 45 St...

Страница 49: ...Range General Deep Patch Hi Mineral Hi Trash Pinpoint Motion Very Slow Slow Medium Fast Slow Very Slow Medium Medium Medium Very Slow Rx Gain 1 20 11 12 8 8 12 15 Audio Type Quiet Normal Deep Boost N...

Страница 50: ...function you are viewing universal or mode dependant Functions There are two types of functions universal functions under the Main Menu heading and mode specific functions under the Search Mode headin...

Страница 51: ...ting control accesses a settings adjustment screen Function Function Setting Visual Scale With a function highlighted turn the Setting control to the left or right to adjust the setting To return to t...

Страница 52: ...d six the time out period is in increments of 10 seconds 1 10 seconds 2 20 seconds 6 60 seconds 7 120 seconds 8 Always On The time out period is the length of time that the light will stay on after th...

Страница 53: ...screen will automatically return to the list of functions after seven seconds For more information on your GPX Series battery see Charging the Battery pp 18 19 and Taking Care of Your Battery p 21 Lit...

Страница 54: ...me Limit is set to half way the target signal is unaffected for a small target but limited for a very large target If the Volume Limit is set to minimum most target signals will potentially be very li...

Страница 55: ...ed Mid Range Volume Limit Faint signals are unaffected but loud signals are limited Minimum Volume Limit Both loud and faint signals are reduced to quiet levels Volume Limit 20 Vo Th Threshold 20 Volu...

Страница 56: ...eas of highly magnetic iron rich soils Use of Specific GB will allow you to keep the coil closer to the ground and allows Monoloop coils to be accurately ground balanced in areas normally too hot for...

Страница 57: ...to Off you can achieve improved depth and sensitivity This feature will most likely be used by beach hunters or inland treasure relic seekers as it is extremely rare to encounter a spot in the gold fi...

Страница 58: ...he Ground Balance switch to Tracking You will hear a high pitched tone that only lasts one second 6 When the low pitch tone begins immediately start lowering and raising the coil over the ground Try t...

Страница 59: ...gnals and false ground noises Shallow highly mineralised ground where gold has been found previously should be re examined with Fine Gold and best results will be had by using the optional 8 and 11 Co...

Страница 60: ...ic should work very well in most common parks ovals and old home sites so is the preferred timing when using your detector for coins jewellery and relics On ocean beaches containing significant quanti...

Страница 61: ...channels can give a little more depth to larger targets but the difference is only marginal 1 Hold the coil vertical and 100mm 4 above the ground making sure there are no large targets or obvious ele...

Страница 62: ...e four Custom Search Modes from the LCD menu To select the preferred Custom Search Mode 1 Place the Search Mode switch into the Custom position 2 Using the Function Select control scroll through the m...

Страница 63: ...Search Modes Choose the Search Mode you wish to edit and select new settings for any functions you wish changed All changes are automatically saved when the detector is switched off You can assign on...

Страница 64: ...Note It is quite important that the Motion setting you select matches the speed at which you swing the coil Medium This Motion setting will often improve performance if a more moderate sweep speed is...

Страница 65: ...y miss deep targets A lower Rx Gain setting is preferable for variable noisy conditions or high interference areas The Rx Gain control should be adjusted to suit the soil conditions and the coil being...

Страница 66: ...for general detecting conditions Normal provides the best compromise for signal response and Threshold stability Deep This setting is the preferred Audio Type when searching for larger targets at dept...

Страница 67: ...he Audio Tone to suit the type of target you are searching for A high Audio Tone setting may help identify small targets from ground signals but a low Audio Tone setting may allow deep target signals...

Страница 68: ...e Stabilizer could be seen as having a similar effect to that of the Rx Gain control However the Stabilizer affects the audio processing only and does not change the Receive Rx signal so it should be...

Страница 69: ...variance between the high and low pitch of the signal A high Signal Peak setting will increase the pitch variation of the target signal However in highly mineralised ground this high variance of sign...

Страница 70: ...make minor adjustments to your Threshold p 33 and Volume Limit p 52 controls The Target Volume can be used as an Audio boost in quiet conditions and can also be used to reduce or smooth out ground noi...

Страница 71: ...rising then falling tonal response Most targets tend to be small so you can become accustomed to hearing that small shallow target tonal response If you are detecting for deep targets the response can...

Страница 72: ...gree of variable mineralisation The GPX 5000 and GPX 4800 have three Auto Tracking Speed options Slow Medium Fast The preferred Tracking Speed is the slowest speed which keeps up with the variability...

Страница 73: ...cases Coils with Tracking Tracking tends to be more aggressive when using a Monoloop coil Faint deep targets may be tracked out In extreme highly variable soil types you may achieve better performanc...

Страница 74: ...nd pitch signals This information does not indicate the type of metal in the object When a target has been located select an appropriate Iron Reject setting switch Ground Balance to Fixed and sweep ov...

Страница 75: ...that has high levels of rubbish that would not be otherwise detectable Iron Reject allows you to increase the amount of discrimination while knowingly accepting more risk When Iron Reject is activate...

Страница 76: ...the Threshold and target signal to blank If the target response is too weak for accurate discrimination the detector will give a normal target signal until you dig closer to the target and the signal...

Страница 77: ...d it is mostly close to the surface you may prefer a more conservative low level of Iron Reject It is usually best to recover all targets especially when you are on a known gold producing site or a su...

Страница 78: ...ame 4 Using the Setting knob scroll down until Bedrock is selected then move the function knob to apply the name change 5 The Search Mode name is now Bedrock and any mode specific setting changes you...

Страница 79: ...away from where the target is Once completed release the button If detecting in Tracking move the coil slowly around the area of the target keeping well away from the target itself Hold down the Quic...

Страница 80: ...located Line up the target at 90 from the initial direction and repeat the process The object is located where the two imaginary lines cross Note With the Coil Rx switch set to Monoloop or Cancel whe...

Страница 81: ...dig your hole you do not heap the loose dirt on top of another target already in the ground 3 If the target signal is still present use your pick to dig to a depth of approximately 50mm 2 Note When d...

Страница 82: ...Note The GPX Series are motion detectors This means the coil must be moving over the target or the target moving over the coil in order for the detector to see it Back fill Every Hole You Dig Always r...

Страница 83: ...le If the signal has decreased in volume or is less defined it is probably ground noise If the signal remains the same or becomes louder it is likely a metallic target If you are still not sure make t...

Страница 84: ...ct along the ground contours rather than across them This will often stabilise the effect In heavily mineralised areas the operator may need to sweep the coil 10 20 mm 1 above the ground This should g...

Страница 85: ...tor and treasure hunter should carry as its versatility is endless Great in thick scrub vegetation heavy mineralisation and high trash it has superb sensitivity and surprising depth for such a small c...

Страница 86: ...r the 11 Monoloop is a brilliant coil for almost any situation The second most sensitive Commander Monoloop it is also one of the most stable Monoloop coils available and remains stable in most soil t...

Страница 87: ...crub or rough terrain A smaller coil is also a lighter weight than a larger coil Discrimination In areas where discrimination is required a Double D coil is necessary for Iron Reject to work In high t...

Страница 88: ...ed Open Ground Heavy Scrub Iron Disc 10 x 5 Elliptical Double D 15 x 12 Semi Elliptical Double D 18 Round Double D 8 Round Monoloop 11 Round Monoloop 15 x 12 Semi Elliptical Monoloop 18 Round Monoloop...

Страница 89: ...n target Random noise Ground Balance again Re tune using the Auto Tune button Set the Coil Rx switch to Cancel Reduce Gain Move away from other detectors working nearby Move away from thunderstorm bui...

Страница 90: ...his field and this disturbance is sensed by the receive system of the detector and indicated to the operator by an audible beep False Signals These sound similar to target signals but are caused by ot...

Страница 91: ...oes neutral or lightly mineralised ground Ground containing heavy salt concentrations require entirely different processing again Monoloop Coils Monoloop coils are the style of coil where the multiple...

Страница 92: ...ng scanned Depending on the style of coil Double D or Monoloop and the Coil Rx setting being used Double D Monoloop Cancel different coils will have a different shaped area being covered by each sweep...

Страница 93: ...otect your coil Regularly replace such items as coil washers and skidplates to increase the life of your detector To prevent dirt entering between the coil and the skidplate silk tape e g Leukosilk ma...

Страница 94: ...Off Special Soil Timings Sens Extra Sharp Coin Relic Salt Coarse Manual Tune 0 255 GPX 4800 Search Mode Menu Mode Specific Functions Function Range General Deep Hi Mineral Motion Very Slow Slow Medium...

Страница 95: ...ld Sens Extra Salt Gold Sharp Coin Relic Manual Tune 0 255 GPX 5000 Search Mode Menu Mode Specific Functions Function Range General Deep Patch Hi Mineral Hi Trash Pinpoint Motion Very Slow Slow Medium...

Страница 96: ...including 11 Coil Excluding Battery and Accessories 2 4kg 5 3lbs Operating Temperature Range 0 C to 45 C 32 F to 113 F Storage Temperature Range 20 C to 65 C 4 F to 149 F Type Lithium ion Output Volt...

Страница 97: ...d Minelab Electronics Pty Ltd regional distributor within 14 days of the original purchase date If you need to return your detector to Minelab for service please fill out the Minelab Service Repair Fo...

Страница 98: ...urchased From Purchase Date Part s Sent Owner s Name Address Telephone Day Home Mobile Fax Email Service and Repair Form Description of Fault cut out or photocopy Please explain how we can replicate t...

Страница 99: ...68 no part may be reproduced by any process without written permission from Minelab Electronics Pty Ltd 118 Hayward Avenue Torrensville SA 5031 Australia WARNING This document contains Minelab Electro...

Страница 100: ...ctronics Pty Ltd Tel 61 0 8 8238 0888 Email minelab minelab com au Minelab International Ltd Tel 353 0 21 423 2352 Email minelab minelab ie Minelab Americas Inc Tel 1 630 401 8150 Email info minelabam...

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