AT Pro International Owner's Manual

The powerful, all-terrain solution for locating deeply buried European coins and artefacts!

1881 W. State Street
Garland, Texas 75042
Tel: 1.972.494.6151
Email: sales@garrett.com
Fax: 1.972.494.1881

© 2012 Garrett Electronics, Inc. PN 1533300.C.1012

THANK YOU FOR CHOOSING GARRETT METAL DETECTORS!

Congratulations on the purchase of your new Garrett AT Pro™ metal detector. This enhanced metal detector has been specifically designed for use in Europe's challenging environments.

The AT Pro includes Garrett's exclusive Target ID technology and patented discrimination features. Two indicator scales allow you to see the detector's discrimination setting (Lower Scale) as well as the analysis of each target (Upper Scale). In addition, a Digital Target ID scale provides a more specific target value. The AT Pro also features High Resolution Iron Discrimination (40 points) for separating desirable targets from iron junk 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, the AT Pro can be operated in a very user-friendly Standard (STD) Mode or in a more advanced PRO Mode for experienced hunters.

Backed by more than 45 years of extensive research and development, your Garrett AT Pro metal detector is the most advanced of its kind in the industry. Whether you are experienced or a beginner, this machine is well suited for a wide variety of detecting environments. The AT Pro's advanced features are designed for the expert treasure hunter but its Standard Mode can be easily operated by the beginner.

In order to take full advantage of the special features and functions of the AT Pro, you are urged to carefully read this instruction manual in its entirety.

AT PRO CONTROL PANEL

The control panel features several key indicators and buttons:

• Target ID Legend: Indicates metal types.
• High Resolution Iron Discrimination: Indicates the level of iron discrimination selected.
• Digital Target ID: Displays a specific target value and also shows ground balance settings when in GND-BAL mode.
• Target ID Cursor (Upper Scale): Indicates probable target identity.
• Lower Scale: Indicates the notch discrimination pattern.
• Coin Depth Indicator: Indicates the depth of coin-sized targets.
• Mode Indicator: Shows the current detection mode.
• Sensitivity Setting: Indicates the current sensitivity level.

Buttons:

• Iron Disc Pushbutton: Use (+) or (-) to change iron discrimination level.
• Iron Audio: Use to hear discriminated iron.
• ON/OFF Power: Hold for 1 second to turn power on/off.
• MODE: Push quickly to toggle between detection modes.
• RESET: Hold for 5 seconds to restore factory settings.
• PINPOINT / Frequency Adjust Pushbutton: Press and hold to pinpoint or use with SENSITIVITY (+) or (-) to change frequency.
• GROUND BALANCE Pushbutton: Press and hold for fast auto ground balance or use with NOTCH DISC (+) or (-) for manual ground balance.
• SENSITIVITY Pushbutton: Increases or decreases sensitivity.
• ELIM and NOTCH DISC Pushbuttons: Use NOTCH DISC (+) or (-) to select a cursor. Then use the ELIM button to set its discrimination on or off.

QUICK START GUIDE

1. Install batteries: The AT Pro operates with four (4) AA batteries, typically pre-installed.
2. Power ON: Press and release the ON/OFF Power button. The detector powers on in the last used mode and is ready to search. (Factory default is Coins mode.)
3. Select Mode: Use the Mode Pushbutton to cycle through the available detection modes.
4. Adjust settings: Adjust Sensitivity or Discrimination settings as desired.
5. Begin scanning: Lower the searchcoil to 2 to 3 cm above the ground and scan the coil left and right at approximately 1 meter per second.

AT Pro COMPONENTS

The AT Pro metal detector consists of the following main components:

• Search coil
• Lower Stem
• Upper Stem
• Camlocks
• S-shaped Stem
• Control Housing
• LCD Screen
• Pushbutton Controls
• Arm strap
• Handle Grip
• Detector Stand
• Padded Arm Cuff

LIST OF PARTS

The detector box typically contains:

• One (1) control housing with S-shaped stem
• One (1) upper stem and one (1) lower stem connected, with camlock fasteners
• One (1) wing nut, two (2) mounting washers, and one (1) threaded bolt
• One (1) 28x22 cm DD searchcoil
• Owner's manual
• Warranty Card
• Headphones

No tools are required for assembly. If any part is missing, contact your local dealer.

ASSEMBLY

1. Loosen the camlock on the upper and lower stem assembly by twisting it clockwise.
2. Slide the lower stem out to engage the spring clips in the upper stem holes.
3. Align the holes in the mounting washers with the small posts on the lower stem and press firmly into place.
4. Slide the searchcoil onto the stem.
5. Insert the threaded bolt through the holes of the lower stem and searchcoil. Hand-tighten the searchcoil assembly with the wing nut.
6. Loosen the camlock at the end of the upper shaft by turning counter-clockwise. If the camlock collar slides off, slide it back on and tighten slightly.
7. Depress the spring clip in the S-stem (containing the control housing) and insert the S-stem through the upper camlock collar into the upper stem. Ensure the spring clip engages in the first stem opening for battery compartment access. Hand-tighten the camlock collar.
8. Depress the spring clip in the lower stem and adjust to the most comfortable operating length. Hand-tighten the lower stem camlock collar.
9. Wrap the coil cable snugly about the stem, starting with the first turn over the stem.
10. Insert the coil connector into the 4-pin connector of the control housing and hand-tighten. Ensure the connector pins align, then press the connector in firmly until the O-ring is felt to be fully inserted.
11. If needed, adjust the arm cuff by removing the bottom screw, moving the cuff to another hole, reinserting the screw through the headphone cable clip, and tightening.
12. Attach headphones to the 2-pin connector of the Control Housing, aligning pins and pressing firmly until the O-ring is seated.
13. Secure the headphone cable under the detector's arm cuff by pressing it into the headphone cable clip.

POWERING ON

To turn the detector on, press and release the ON/OFF Power button. The AT Pro will power on in the last mode used and be ready to search. The factory default mode is Coins.

To turn the detector off, press and hold the power button for one (1) second until a second beep is heard.

To restore factory settings, press and hold the power button for 5 to 10 seconds until a fast double beep is heard.

SEARCH MODES

The AT Pro offers six detection modes: three Standard (STD) Modes and three Professional (PRO) Modes. It is recommended to start with a Standard Mode to become familiar with the detector before using the more advanced audio features of the Pro Modes.

Tap the Mode button to cycle through the six modes: Custom, Coins, or Zero in STD Mode, and Custom, Coins, or Zero in PRO Mode.

Overview of STD Mode vs PRO Mode

In Standard (STD) Mode, the AT Pro provides a full-strength audio response regardless of target amplitude. This consistent, binary response is preferred by many beginners for its simplicity. The target's dominant conductivity is reported by a single tone.

Pro Mode offers more target information through Proportional Audio and Tone Roll Audio, providing insights into a target's size, depth, and conductivity changes. Pro Mode also offers faster recovery speed for separating adjacent targets, which is beneficial in areas with scattered good targets amongst iron trash.

Pro Mode audio may produce more audible chatter than Standard Mode due to its increased sensitivity. The audio depth in Pro Mode can sometimes exceed the Target ID depth, allowing detection of deep targets that might not register on the ID scale.

Standard (STD) Detection Modes

In STD modes, the AT Pro produces a full-strength binary audio beep for detected targets. This mode is ideal for learning the detector due to its consistent audio signals, where targets are heard at the same full-strength beep regardless of size or depth.

Three discrimination patterns are available in Standard Mode: Zero, Coins, or Custom. These patterns are the same in either Standard or Pro modes.

ZERO Mode

Designed to detect all types of metal. Use ZERO mode for finding all metal items or when the desired object's material is unknown. All 12 discrimination pixels are active, and High-Res Iron Discrimination is set to 0, meaning no targets are eliminated. This mode is useful for locating targets with inconsistent signals, which might indicate iron or a trash target close to a good target.

COINS Mode

Designed to find coins, jewelry, etc., while eliminating trash items like iron and foil. High-Res Iron Discrimination is preset to 35 to exclude most iron targets, and one pixel of foil is excluded. Note that pulltabs and pieces of tabs may not be eliminated as their conductivity is similar to small coins and jewelry.

CUSTOM Mode

This mode allows the operator to customize settings, which are retained when the detector is switched off. The factory preset for CUSTOM Mode is the same as ZERO Mode. Users can start with this pattern and then use the IRON DISC and NOTCH DISC pushbuttons to customize discrimination settings.

Note: Changes made to ZERO or COINS modes are not retained after the detector is switched off.

PRO DETECTION MODES

PRO Mode utilizes Pro Audio functions, including Proportional Audio and Tone Roll Audio, for enhanced target information. This mode provides more target information and faster recovery speed for separating adjacent targets, especially in areas with iron trash.

Proportional Audio (Pro Mode)

Proportional audio means the loudness of the target's response is proportional to its signal strength, allowing users to hear subtle changes. This also helps in judging a target's size, shape, and depth, and provides faster recovery time for separating adjacent targets.

Audio Target Response Comparison: Standard vs Pro Mode

Description: The diagram illustrates the difference in audio response between Standard Binary Audio and Proportional Audio. In Standard mode, both shallow and deep coins produce a solid, consistent beep. In Pro Mode, the shallow coin yields a stronger signal, while the deeper coin produces a softer signal, providing more detailed target signature information.

Adjacent Targets Comparison: Standard vs Pro Mode

Description: This diagram shows that two adjacent coins produce a single strong signal in STD Mode. In PRO Mode, the proportional audio provides two distinct peaks of audio response, enabling the user to identify multiple targets.

Tone Roll Audio (Pro Mode)

Tone Roll Audio provides more audible target information, particularly for flat iron objects like bottle caps or washers. Unlike Standard Mode's single tone based on the strongest signal, Tone Roll Audio offers varying tones as the searchcoil passes over a target, improving overall target information and identification.

Tone ID Comparison: Standard vs Pro Mode

Description: The diagram shows that in STD Mode, bottle caps and other flat iron objects can produce a high tone, similar to a coin. In PRO Mode, a bottle cap produces a distinctive Low-High-Low response, while a coin produces a High tone, allowing for better differentiation.

TARGET ID INFORMATION

The AT Pro's Digital Target ID system provides a specific target value to help identify targets more precisely. Targets are identified by number, with ferrous items near 1 and highly conductive targets (like thick silver) registering closer to 99.

• Target ID Legend: Works with the Target ID Cursor to indicate a target's probable identity. Ferrous targets appear on the left, thin non-ferrous targets in the middle, and thick/high conductivity targets on the right.
• Target ID Cursor (Upper Scale): Indicates the probable identity of a detected target using 20 graphic segments.
• Lower Scale (Notch Discrimination Scale): Continually shows the discrimination pattern. Pixels switched ON produce an audible response; those switched OFF do not. The Target ID Cursor always indicates all targets.

Note: Target values can vary based on target orientation, ground mineralization, and other factors. Practice in the field is essential to understand these effects.

DIGITAL TARGET ID

The Digital Target ID is a more precise version of the Target ID Cursor, with each cursor segment representing 5 digital points. For example, a Digital Target ID of 73 lights the cursor from 70 to 75.

This system, combined with audio signals, provides more information. The PRO Mode's audio depth can exceed Target ID depth, allowing faint targets to be heard without providing an ID.

TONE ID

The Tone ID feature produces three distinct audible tones based on a target's metal type and conductivity:

• Low-Tone: Ferrous targets (nails, iron, steel).
• Medium-Tone: Small, thin non-ferrous targets (small jewelry, foil, thin hammered coins).
• High/Bell Tone: Non-ferrous targets with medium to high conductivity (most coins and jewelry). PRO Mode produces a high tone; STD Mode produces a bell tone.

DISCRIMINATION

The AT Pro's NOTCH DISC pushbuttons, used with the ELIM pushbutton, eliminate trash objects like foil or pull-tabs.

Notch Discrimination

The AT Pro has 12 pixels or "notches" of discrimination, in addition to 40 points of High-Res Iron Discrimination. Any combination of these pixels can be switched on or off.

Method 1 (Manual Modification): Use the NOTCH DISC (+) or (-) buttons to move the Target ID cursor to a pixel. Press the ELIM pushbutton to eliminate or activate that pixel on the Lower Scale.

Method 2 (On-the-Fly): When an unwanted target is detected audibly, push the ELIM button to create a notch at that Target ID Cursor. The detector will then ignore that item.

The ELIM pushbutton can also be used to find specific items. For example, to find a lost earring, scan it in ZERO mode, note its Target ID cursor position, then use NOTCH DISC and ELIM to switch off all pixels except that one. The detector will then be programmed to find items with that conductivity.

Note: Notch discrimination modifications made in CUSTOM mode are retained when the detector is switched OFF. Changes made in ZERO or COINS modes return to factory settings upon switching OFF and ON.

Iron Discrimination

The AT Pro features high-resolution iron discrimination adjustment, allowing precise control from 0 (no iron discrimination) to 40 (maximum iron discrimination).

Use the (+) or (-) IRON DISC pushbuttons to adjust the Iron Discrimination level. The two-digit number above "IRON DISC" on the LCD indicates the current setting.

Example: Manual Modification of Notch Discrimination Pattern

Description: The diagrams show how to use the NOTCH DISC and ELIM buttons to modify the discrimination pattern on the Lower Scale. The first diagram illustrates positioning the cursor over a pixel to be eliminated, and the second shows the pixel being rejected.

Iron Discrimination Examples

Description: The illustrations demonstrate how iron objects can mask good targets. Illustration 1 shows an iron nail. Increasing Iron Discrimination to 25 (as shown in the display) eliminates the nail. Illustration 2 shows the nail positioned above a good coin. With Iron Discrimination set to 25, the nail is rejected, but the combined conductivity of the coin and nail (above 25) allows the coin to be detected.

IRON AUDIO

Press and release the IRON AUDIO pushbutton to toggle the Iron Audio feature ON/OFF. When ON, "IRON AUDIO" appears on the LCD. This feature can be used in any of the AT Pro's six modes.

Iron objects can mask good targets or create false signals. Iron Audio allows the user to hear discriminated iron (normally silenced) to understand the full picture and avoid digging undesired targets. It also allows adjustment of the mid-tone range to include targets above the iron discrimination setting, helping to distinguish good targets.

Iron Audio Feature Illustrations

Description: The illustrations show the effect of Iron Audio. With Iron Audio OFF, low, mid, and high tones are divided normally. With Iron Discrimination set to 20 and Iron Audio OFF, targets below 20 are silent. With Iron Audio ON, targets below 20 are heard as a low tone, and targets above 20 produce a mid or high tone. In PRO Mode, iron targets produce more distinctive multi-tone responses, like a nail producing fast low tones or a bottle cap producing a Low-High-Low response.

Tip for using Iron Audio: In areas with high iron concentration, turn Iron Audio OFF to avoid excessive signals. If a target has a questionable response, turn Iron Audio ON to check if it is iron.

SENSITIVITY

The AT Pro has eight (8) sensitivity settings. Use the (+) or (-) SENSITIVITY buttons to step through these levels, which are displayed on the LCD.

Use higher sensitivity for very small or deep targets. Use lower sensitivity in locations with excessive metallic trash, highly mineralized soils, saltwater beaches, electrical interference, or the presence of other metal detectors, where the detector might behave erratically.

GROUND BALANCE

Detector performance can be affected by ground mineralization. The AT Pro can be ground balanced automatically or manually to cancel unwanted ground signals, ensuring stability and target detection.

• GND BAL Indicator: Displays on the LCD when in use.
• GND BAL Setting: Displays only while in Ground Balance mode.
• GND BAL Pushbutton: Hold for Automatic Ground Balance or use with NOTCH DISC pushbuttons for Manual Ground Balance.

Automatic Ground Balance:

Press and hold the GND BAL pushbutton while bouncing the searchcoil 2 to 20 cm above the ground. When a minimal audio response from the ground is detected, release the pushbutton. The ground balance value will be shown on the LCD.

Low ground balance values indicate conductive soil; high values indicate ferrous soil.

Manual Ground Balance:

Use Manual Ground Balance to balance slightly positive (to enhance small targets) or slightly negative (to reduce detection of "hot rocks," terra cotta, saltwater).

Press and release the GND BAL pushbutton, then bounce the searchcoil 2 to 20 cm above the ground. If low tones are produced, increase the setting using the (+) NOTCH DISC pushbutton. If high tones are produced, decrease using the (-) NOTCH DISC pushbutton. Adjust in single steps or by holding the buttons for larger adjustments. Continue until a minimum audio response is achieved. The setting will be indicated on the LCD.

Press the GND BAL pushbutton again to exit Manual Ground Balance mode. The setting is retained when the detector is switched OFF.

Typical Ground Balance Ranges:

• 80-99: Highly ferrous (magnetite, black sands, hot rocks, terra cotta).
• 60-80: Moderately mineralized soils (red clay, brown clay).
• 20-60: Likely an iron object.
• 0-20: Highly conductive, non-ferrous minerals (saltwater).

FREQUENCY ADJUSTMENT

Use the PINPOINT/Freq Adj pushbutton in conjunction with the (+) or (-) SENSITIVITY pushbuttons to adjust frequency.

The AT Pro operates at four slightly different frequencies to minimize interference from electrical sources or other metal detectors. Hold the PINPOINT button and press SENSITIVITY (+) or (-) to change frequency for the least interference. The setting (F1-F4) will be indicated on the LCD.

Note: Frequency adjustments are small and do not significantly affect target detection capabilities.

PINPOINTING

Press and hold the Pinpoint pushbutton to determine the exact location of a target. Position the searchcoil to the side of the suspected location at a fixed height (e.g., 2cm) above the ground. Sweep the searchcoil over the target area while maintaining the same height. Sweep side-to-side and front-to-back in a crosshair pattern to locate the peak signal. Maintaining a constant height is recommended to prevent false signals from ground mineralization.

The LCD bar graph indicates signal strength. The greatest number of segments (increasing left to right) shows the center of the searchcoil is directly over the target. The symbol "PP" indicates pinpointing is active.

Note: The center of detection is just ahead of the coil's stem mount. The opening ahead of the stem mount can serve as a reference point.

Narrowing the Detection Area

Large targets can produce wide signals, making precise pinpointing difficult. To narrow the field, while holding Pinpoint, move the coil toward the target until the LCD reaches a full-scale response. Quickly release and depress the Pinpoint button again to retune and narrow the detection field. Repeat as needed.

A hand-held pinpointer, such as Garrett's Pro-Pointer, is recommended to speed target recovery and locate secondary targets.

Coin Depth Indicator

The depth of a coin or similar target is indicated in 5cm increments. Larger targets may appear shallower than actual depth, while smaller targets may appear deeper.

Alternative Pinpointing Techniques: DD-tip or tail

Some detectorists prefer to pinpoint off the tip or tail of the DD searchcoil. The standard method pinpoints beneath the center of the coil.

DD "tip" pinpointing technique: Press and hold the Pinpoint pushbutton and sweep the searchcoil side-to-side to center the target (where the strongest audio response is heard). Then, pull the searchcoil slowly toward you, noting the target signal. When the signal drops off audibly and on the LCD, shallow targets are located just in front of the coil's tip. Deep targets are under or inside the tip. This is due to the conical shape of the detection field bending inward with depth.

You can reverse this technique to pinpoint off the DD coil's tail by pushing the coil away from you.

Alternative Pinpointing Technique: DD-wiggle

Quickly locate targets without the Pinpoint button: Swing the searchcoil side-to-side with fast, narrow swings (5-10cm). Slowly move the searchcoil sideways toward the target's suspected position until a consistent, symmetric audio beat is produced, indicating the lateral position. Then, rotate 90° and repeat to find the front-to-back position.

Tip: Practice these pinpointing options in a test plot to find what works best. Improved accuracy leads to smaller holes and more productive hunting.

HUNTING TIPS

• Begin hunting in STD Mode, then switch to PRO Mode after gaining experience.
• For new users, start in sandy or loose soil to make learning easier.
• Keep the searchcoil at a constant height of 2 to 3 cm above and parallel to the ground during all swings. Do not lift or tilt the coil at the end of swings.

Correct Swing vs. Incorrect Swing

Description: The diagrams illustrate proper and improper searchcoil swinging. A correct swing maintains a constant height and parallel alignment with the ground. An incorrect swing involves lifting or tilting the coil at the end of the swing, which can affect detection results.

• Walk slowly, scanning the searchcoil in a straight line from side to side at about 1 meter per second. Advance the searchcoil about half its length at the end of each sweep.

Overlap Swing Diagram

Description: The diagram shows how to overlap searchcoil swings by approximately 14 cm for complete area coverage, maintaining a sweep speed of about 1m/sec.

Tips for saltwater use:

Hunting in saltwater is challenging for any VLF metal detector as saltwater is conductive and produces signals similar to foil. While the AT Pro is not specifically designed for saltwater, it can be used in this environment.

• Proper ground balance is crucial for stable saltwater operation. Ground balance the detector to the area (saltwater beaches typically balance between 0 and 20).
• If necessary, reduce Sensitivity until signals stabilize.
• Swing the searchcoil flat and at a constant height. Avoid bouncing or lifting the coil at the end of swings.
• Swing the searchcoil parallel to the water's edge.

The detector is less stable in shallow, breaking surf due to the constantly changing water environment. To improve stability, negatively bias the ground balance by several points (e.g., reduce from 11 to 7 or 8). Introduce only enough negative bias for stable operation and reduce Sensitivity as needed. While some background chatter may remain, definitive target responses can be recognized. Notching out the first pixel under Foil may be necessary, but this can reduce detection of small jewelry items.

Tips for locating targets amongst terra cotta/hot rocks:

Magnetic minerals like hot rocks and terra cotta can mask good targets. First, ground balance the AT Pro to these minerals. Be aware that the combined Target ID might be low (e.g., 10-15 for bronze coin and terra cotta). Reduce Iron Discrimination levels to ensure detection of good targets covered by terra cotta. The Iron Audio feature can also help by producing medium or high tones for targets above the discrimination point.

Isolating adjacent targets

The AT Pro's narrow DD searchcoil provides better separation of adjacent targets compared to a concentric coil. Use narrow swings in trashy areas to isolate good targets.

Searchcoil Comparison Diagram

Description: The diagram illustrates the difference in detection field width between a DD Searchcoil (narrower) and a Concentric Searchcoil (wider).

• Swing your searchcoil parallel to plow lines and the water's edge. This minimizes negative effects from uneven ground and moisture. Swinging perpendicular may cause abrupt ground response changes.

BENCH TESTS

Conduct bench tests to familiarize yourself with the AT Pro's operation in Standard and PRO modes, and to test the Iron Audio feature. Suggested test items include coins, iron nails, and bottle caps or steel washers.

Test Procedure: Place the searchcoil on a flat, non-metallic surface several feet from other metallic objects. Start in STD Mode with ZERO discrimination. Pass coins individually across the searchcoil (8-10 cm distance), noting the audio tone and Target ID. Then, select PRO Mode with ZERO discrimination and repeat, observing sounds and Target IDs.

Proportional audio characteristics of PRO Mode are best understood through bench testing. Pass coins across the searchcoil at varying distances (5 cm, 10 cm, 15 cm). In STD Modes, targets produce a consistent tone regardless of distance.

Discrimination Bench Test:

Test iron nails in STD and PRO Modes with ZERO discrimination. Note the Low-Tone sound and Digital Target ID. If the nail registers up to 26, use IRON DISC pushbuttons to set Iron Discrimination to 26. Re-test to verify elimination. If not eliminated, increase Iron Discrimination further. Then, press IRON AUDIO and test the nail again in both modes with Iron Audio ON.

Iron Audio Bench Test:

Flat iron objects like bottle caps can appear as good targets in standard mode. To test Iron Audio benefits, use a bottle cap. In STD Mode with Zero discrimination, pass the bottle cap across the coil (8-10 cm). It registers 75-85 and produces a high tone. In PRO Mode, the audio becomes a chirping tone with subtle low tones. A coin produces a clean high tone for comparison. Finally, in PRO Mode with IRON DISC set to 35 and Iron Audio ON, pass the bottle cap across the coil again. It produces a high-tone chirp flanked by distinctive low tones, unmistakably identifying it as iron.

Final tip: Record bench test results for field use. Knowledge of PRO Mode and Iron Audio can reduce digging trash targets.

UNDERWATER OPERATION

The AT Pro can be immersed in water up to a 3-meter depth for searching along shorelines, rivers, piers, docks, or swimming holes. Use beyond 3 meters can cause leaks and damage, voiding the warranty. For saltwater use, refer to pages 41-42.

The AT Pro is shipped with standard land-use headphones, which may be used near water but not submerged. For submersion, optional waterproof headphones (available from Garrett) must be used.

CARE AND MAINTENANCE

Battery Replacement

The Battery Level Indicator shows 4 illuminated bars when batteries are fresh or fully charged. Performance is maintained until batteries need replacement, indicated by only one segment remaining. NiMH rechargeable batteries are compatible, offering 20-40 hours of operation.

To replace batteries, rotate the battery cover housing counterclockwise, pull off the cap, and slide out the battery tray. Remove batteries if storing the detector for over 30 days.

General Care:

The AT Pro is rugged but requires basic care:

• Avoid extreme temperatures (e.g., storage in hot car trunks or sub-freezing conditions).
• Keep the detector clean by wiping the control housing with a damp cloth.
• Disassemble the stem and wipe it and the searchcoil with a damp cloth.
• When storing for over one month, remove batteries.
• Use quality alkaline batteries; replace all batteries at once for optimum performance.
• Replace the protective cover on the connector when not using headphones.

TROUBLESHOOTING GUIDE

METAL DETECTING CODE OF ETHICS

Many treasure hunting clubs and hobbyists follow this code to preserve the hobby:

• Respect private and public property, historical and archaeological sites; obtain permission before detecting on these lands.
• Stay informed on and obey all local and national legislation regarding found treasures.
• Aid law enforcement officials when possible.
• Cause no willful damage to property, including fences, signs, and buildings.
• Always fill the holes dug.
• Do not destroy property, buildings, or remains of deserted structures.
• Do not leave litter or discarded junk items behind.
• Carry out all rubbish and dug targets when leaving a search area.
• Observe the Golden Rule: use good outdoor manners and conduct yourself to enhance the public image of metal detection.

CAUTIONS

When searching for treasure with a Garrett detector, observe these precautions:

• Never trespass or hunt on private property without permission.
• Avoid areas with buried pipelines or electric lines.
• National and state parks/monuments are off-limits.
• Deepseeking detectors can find concealed pipes, wiring, and dangerous materials; notify authorities if found.
• Do not hunt in military zones where explosives may be buried.
• Do not disturb pipelines, especially those carrying gas or liquid.
• Use caution when digging, particularly in areas with uncertain ground conditions.
• If unsure about detecting in an area, seek permission from proper authorities.

WARRANTY & SERVICE

Your AT Pro detector is warranted for 24 months (limited parts and labor), excluding damage from alteration, modification, neglect, accident, or misuse. Use at submerged depths exceeding 3 meters voids the warranty.

If problems occur, carefully read this Owner's Manual to ensure it's not due to misadjustments. Press and hold the power pushbutton for 5 seconds to return to factory settings.

Ensure:

1. Batteries, switches, and connectors are checked. Weak batteries are a common cause of problems.
2. Your dealer is contacted for assistance, especially if you are unfamiliar with the AT Pro.

For repairs or warranty service, contact the local retail outlet where the detector was purchased. To avoid excessive shipping and import charges, do not return products to the factory in the United States. International warranty/repair information is available on the Garrett website (www.garrett.com), under the Hobby Division and Technical Support page.

AT Pro ACCESSORIES

• 11.5cm Super Sniper™ Searchcoil: For small, shallow targets or trashy/tight places.
• 23 cm. PROformance Concentric Searchcoil: Waterproof, offers excellent depth for medium-sized targets in less mineralized soils.
• 30.5 cm. PROformance Concentric Searchcoil: Waterproof, offers excellent depth for larger targets in less mineralized soils.
• Waterproof Headphones: Required for full submersion.
• 28 cm. DD Searchcoil Cover: Protects the searchcoil surface.
• Garrett PRO-POINTER® Pinpointing Detector: Combines performance with design for pinpointing. Features proportional audio/vibration, 360° side scan, water resistance, LED light, belt holster, and 9-volt battery.

See Garrett's complete collection of metal detector accessories at www.garrett.com. Additional searchcoils, recovery tools, headphones, carrying bags, searchcoil covers, caps, and shirts are available.

SUGGESTED READING

Pocket-size treasure-hunting field guides by Charles Garrett are available. The edition covering Europe includes personal experiences, tips, and techniques (76 pages, PN 1546200).

RAM BOOKS TITLES

RAM Books, a division of Garrett Metal Detectors, publishes new titles annually on treasure hunting, gold prospecting, coin hunting, and relic recovery.

Suggested Reading: European Metal Detecting Guide

Highlights include hundreds of full-color photographs, 5.5" x 8.5" size, 324 pages, field tips from European detectorists, explanations of detector/searchcoil technology, illustrations of techniques, and European treasure laws. Ideal for new detectorists.

Description: The European Metal Detecting Guide offers extensive full-color photos of treasures with descriptions, field photos, basic search techniques with illustrations, and advice from experienced detectorists.

Visit www.garrett.com for more RAM Books titles.