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58 Garrett Metal Detectors

European Metal Detecting Guide

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

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Proper basic

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Summary of Contents for AT Pro

Page 1: ...AT PRO INTERNATIONAL Owner s Manual Owner s Manual TM...

Page 2: ...in cluttered areas several advanced audio features and a standard 28x22cm elliptical Double D searchcoil engineered for optimum performance in Europe s more challenging mineralised soils In addition t...

Page 3: ...2 Garrett Metal Detectors...

Page 4: ...ARGET ID 20 TONE ID 21 DISCRIMINATION 22 Notch Discrimination 22 Iron Discrimination 24 Iron Audio 27 SENSITIVITY 30 GROUND BALANCE 31 Automatic Ground Balance 31 Manual Ground Balance 32 FREQUENCY AD...

Page 5: ...ndicator Target ID Legend indicates metal types Lower Scale indicates notch discrimination pattern Target ID Cursor indicates probable target identity Digital Target ID also shows ground balance setti...

Page 6: ...utton The AT Pro powers on in the last mode used and is ready to search Factory default mode is Coins 3 Select Mode Use the Mode Pushbutton to select a different detection mode when desired 4 Adjust s...

Page 7: ...Garrett Metal Detectors AT Pro COMPONENTS Control Housing S shaped Stem Upper Stem Lower Stem Search coil Handle Grip Padded Arm Cuff LCD Screen Detector Stand Pushbutton Controls Arm strap Spring Cli...

Page 8: ...one 1 threaded bolt One 1 28x22 cm DD searchcoil Owner s manual Warranty Card Headphones AT Pro International 7 LIST OF PARTS No tools are required to assemble the AT Pro Four 4 AA batteries are inclu...

Page 9: ...ower stem and press firmly into place 2 Slide the searchcoil onto the stem 3 Insert the threaded bolt through the holes of the lower stem and searchcoil Hand tighten the searchcoil assembly with the w...

Page 10: ...perating length 6 Wrap the cable snugly about the stem with the first turn of the cable over the stem 7 Insert the coil connector into the 4 pin connector of the control housing and hand tighten 6 7 8...

Page 11: ...ector of the Control Housing Note Headphones are not required but are desired by many hunters to hear faint targets Connecting the headphones will silence the detector s speaker Note The provided head...

Page 12: ...with the same settings used prior to switching the unit OFF To turn off the detector press and hold this pushbutton for one 1 second until the detector produces a second beep To restore the factory s...

Page 13: ...detectorists prefer this consistent unambiguous binary either on or off target response The AT Pro s Standard Mode operates in this clean binary response format in which the target s dominant conducti...

Page 14: ...Such signals could mean the target is made of iron or a trash target is close to a good target Standard STD Detection Modes In the STD modes the AT Pro produces a full strength binary audio beep to i...

Page 15: ...ems have conductivities similar to small coins and jewelry CUSTOM Mode This mode can be customized by the operator and the AT Pro will retain the changes when the detector is switched off The factory...

Page 16: ...o Mode audio by its nature creates more audible chatter than Standard Mode This is normal because of the additional sensitivity of Pro Mode The audio depth can exceed Target ID depth in Pro Mode so it...

Page 17: ...n the two target scenarios above The binary audio gives a solid consistent beep for both the shallow and the deep coin In contrast PRO Mode s proportional audio provides a stronger signal for the shal...

Page 18: ...djacent Targets Comparison Standard vs Pro Mode These two adjacent coins would produce one strong signal while in STD Mode In PRO Mode the proportional audio provides two peaks of audio response to al...

Page 19: ...hcoil approaches and passes over the target These varying tones of audio provide better overall target information and identification Bottle cap Coin While in STD Mode bottle caps steel washers and ot...

Page 20: ...indicate at the right Target ID Cursor Upper Scale The Target ID cursor in conjunction with the Target ID Legend indicates the probable identity of a detected target The upper scale consists of twent...

Page 21: ...n of the Target ID Cursor shown in the Upper Scale Each Target ID Cursor has a width of 5 digital points For example a Digital Target ID of 73 will light the cursor from 70 to 75 This system when used...

Page 22: ...ID feature produces three distinct audible tones based on a target s metal type and conductivity Low Tone Ferrous targets such as nails iron steel etc Medium Tone Small thin targets that are non ferr...

Page 23: ...or off based upon your preference There are two primary methods for modifying the Notch Discrimination Pattern to reject a specific type of trash or unwanted item The first method uses the NOTCH DISC...

Page 24: ...he ELIM button to create a notch at that Target ID Cursor The next time the AT Pro encounters the same trash item it will not produce an audible signal The AT Pro s ELIM pushbutton can also be used to...

Page 25: ...le in ZERO or COINS modes will return to the factory settings when the detector is switched OFF and back ON again Iron Discrimination The AT Pro features a high resolution iron discrimination adjustme...

Page 26: ...the good target shown in Illustration 2 Illustration 1 Illustration 2 The examples shown below illustrate how an iron object can often mask out the signal of an adjacent good target when too much iron...

Page 27: ...level to 25 using the IRON DISC pushbutton In Illustration 2 the same iron nail is laying above a good coin target Since the Iron discrimination level is set to 25 the nail by itself would not be det...

Page 28: ...bjects in the ground can mask good targets and even create ghost signals that appear to be a good target Garrett s selectable Iron Audio feature allows the user to hear discriminated iron normally sil...

Page 29: ...are now heard as a low tone and targets above 20 will produce a mid or high tone Refer to the illustrations below regarding the use of the Iron Audio feature When Iron Audio is on in the PRO Mode iro...

Page 30: ...on Audio feature conduct the following experiment Start with the AT Pro in Standard STD Zero Mode and pass the searchcoil over a bottle cap which is lying flat on the ground Note that the target respo...

Page 31: ...through the eight levels which are continuously shown on the LCD Use higher sensitivity levels when searching for very small or very deep targets Use lower sensitivity levels in locations where the de...

Page 32: ...cally or manually to cancel unwanted ground signals and obtain maximum stability and target detection Automatic Ground Balance Press and hold the GND BAL pushbutton while continually bouncing or pumpi...

Page 33: ...using the NOTCH DISC pushbutton Press and release the or NOTCH DISC pushbuttons to make single step adjustments or press and hold to make large adjustments Continue bouncing the coil and making adjus...

Page 34: ...encies in order to minimize the interference caused by electrical sources e g power lines or other metal detectors To adjust frequencies hold down the PINPOINT button and press the or SENSITIVITY push...

Page 35: ...s to prevent ground mineralization from producing false signals or masking the target s signal The bar graph on the LCD can also aid in locating the peak signal When pinpointing the Upper Scale on the...

Page 36: ...OINT Pushbutton Press and hold to pinpoint Coin Depth Indicator Traditional pinpointing technique using Pinpoint pushbutton Note For best pinpointing results maintain a constant height above the groun...

Page 37: ...inpoint button again to retune the detector and narrow its detection field Continue moving the searchcoil toward the target to find its central peak response If needed repeat the retune process to fur...

Page 38: ...is heard and the maximum signal strength is displayed on the LCD Then pull the searchcoil slowly toward you see Image A while noting the target signal DD tip pinpointing technique PUll coiltowardyou...

Page 39: ...swings of 5 10cm i e wiggle While continuing this side to side wiggle slowly move the searchcoil sideways towardthetarget ssuspectedpositionuntiltheaudioresponse produces a consistent symmetric beat...

Page 40: ...t searching in areas with sandy and loose soil to make it easier to learn how to use your metal detector pinpoint and dig targets Keep your searchcoil at a constant height of 2 to 3 cm above and paral...

Page 41: ...40 Garrett Metal Detectors Scan side to side approx 1m per second Walk slowly to allow overlapping of the searchcoil...

Page 42: ...Tips for saltwater use Hunting in a saltwater environment is challenging for any Continous Wave VLF metal detector Saltwater is conductive and produces signals similar to foil Although the AT Pro is...

Page 43: ...the surf making it difficult for the detector to stabilize Tips for locating targets amongst terra cotta hot rocks Magnetic minerals such as hot rocks and terra cotta can mask the presence of good ta...

Page 44: ...erpendicular to plow lines and the water s edge as this may produce abrupt changes in ground response that can reduce the detector s performance Isolating adjacent targets The narrow detection field o...

Page 45: ...onduct a bench test place the searchcoil on a flat non metallic surface that is several feet from other metallic objects Begin by testing in the STD Mode with the ZERO discrimination pattern Pass the...

Page 46: ...es and note the Digital Target ID number it produces If the iron nail registers up to a 26 on the Digital Target ID use the IRON DISC pushbuttons to move the Iron Discrimination setting up to 26 Pass...

Page 47: ...ross the coil and note its clean high tone in comparison to that of the bottle cap Finally remain in PRO Mode and set IRON DISC to 35 and switch on the Iron Audio feature Pass the bottle cap completel...

Page 48: ...d the recommended depth will void the manufacturer s warranty For use in saltwater see tips on pages 41 42 The AT Pro is shipped with standard land use headphones These can be used for searching along...

Page 49: ...Indicator see above are displayed The detector will maintain full performance until the batteries need to be replaced Replace batteries when there is only Remove the battery cover by rotating the cove...

Page 50: ...nic equipment there are some simple ways to care for the detector to maintain its high performance Avoid extreme temperatures as much as possible such as storing the detector in an automobile trunk du...

Page 51: ...nt button to precisely locate all targets In trashy areas use the Super Sniper searchcoil NOTE Iron targets may cause Intermittent Signals You can identify iron targets in ZERO Mode or with the Iron A...

Page 52: ...rting of found treasures I will aid law enforcement officials whenever possible I will cause no willful damage to property of any kind including fences signs and buildings I will always fill the holes...

Page 53: ...led pipes wiring and other potentially dangerous material When those are located the proper authorities should be notified Do not hunt in a military zone where bombs or other explosives may be buried...

Page 54: ...ings You should also make certain you have 1 Checked your batteries switches and connectors Weak batteries are the most common cause of detector problems 2 Contacted your dealer for help particularly...

Page 55: ...oncentric Searchcoil Part No 2222600 Smaller and lighter than the AT Pro s standard DD coil this waterproof searchcoil offers excellent depth in less mineralized soils 28 cm DD Searchcoil Cover Part N...

Page 56: ...inter Garrett PRO POINTER Pinpointing Detector Part No 1166000 The PRO POINTER combines performance with sleek design to assist in pinpointing hard to find targets Includes proportional audio vibratio...

Page 57: ...in Europe plus tips and techniques 76 pages PN 1546200 Also available pocket size treasure hunting field guides written by Charles Garrett Collect them all SUGGESTED READING Available in English langu...

Page 58: ...f European metal detectorists Explanation of detector and searchcoil technology Illustrations of proper detector techniques European treasure laws information Ideal reading for new detectorists RAM BO...

Page 59: ...tions of the items age or value Photo exposes from the field such as this French rally experience Proper basic search techniques with illustrations TO VIEW OTHER RAM BOOKS Go to www garrett com and vi...

Page 60: ...1881 W State Street Garland Texas 75042 Toll Free 800 527 4011 Tel 972 494 6151 Fax 972 494 1881 Email sales garrett com 2010 Garrett Electronics Inc PN 1533300 A 1010...

Page 61: ...60 Garrett Metal Detectors...

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