Garrett AT Max Manual
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Garrett AT Max Manual

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AT Max User Controls ...............................................................................................2
AT Max Display Information .....................................................................................3
Quick Start Guide ....................................................................................................4
Components ............................................................................................................5
AT Max Contents ......................................................................................................6
Detector Assembly ..................................................................................................7
Power On/Basic Controls .........................................................................................9
Factory Reset, Frequency Adjust, Backlight ......................................................9
Target Information ................................................................................................10
Volume Adjust .......................................................................................................11
Selecting Modes (Discrimination Patterns) ...........................................................12
All Metal Mode vs Discrimination Modes ........................................................13
All Metal Mode Audio Characteristics ....................................................................14
Discrimination Mode Audio Characteristics ...........................................................15
Tone ID in Discrimination Modes ....................................................................16
Proportional Audio Characteristics ........................................................................17
Notch Discrimination.............................................................................................18
Sensitivity .............................................................................................................20
Audio Threshold Adjustment .................................................................................21
Ground Balance .....................................................................................................22
Iron Discrimination................................................................................................26
Iron Audio .............................................................................................................28
Z-Lynk Wireless Operation .....................................................................................32
Bench Tests ...........................................................................................................34
Hunting Tips ..........................................................................................................37
Pinpointing ...........................................................................................................41
Underwater Operation ..........................................................................................45
Troubleshooting Guide ..........................................................................................46
Battery Replacement ............................................................................................47
Metal Detecting Code of Ethics ..............................................................................48
Cautions ................................................................................................................49
Caring For Your Detector ........................................................................................49
AT Max Warranty / Service .....................................................................................50
AT Max Accessories ................................................................................................52
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  • Page 1 Hunting Tips ......................37 Pinpointing ......................41 Underwater Operation ..................45 Troubleshooting Guide ..................46 Battery Replacement ....................47 Metal Detecting Code of Ethics ................48 Cautions ........................49 Caring For Your Detector ..................49 AT Max Warranty / Service ..................50 AT Max Accessories ....................52 AT Max ™...

  • Page 2: At Max User Controls

    AT Max Display Information AT Max User Controls Manual Ground Notch Discrimination: Volume Adjust: Press Balance: Press Shift Press Shift Button, use (+) Shift Button, then use Button, then use (+) or (-) or (-) keys to select pixels, (+) or (-) keys to change...

  • Page 3: Quick Start Guide

    Quick Start Guide 1. Power ON. Arm Strap Press the ON / OFF Power button for 1 second. The AT Max powers on in the last mode used and is ready to search. The detector Arm Cuff operates with four (4) AA batteries which are already installed by Handle Grip Garrett.

  • Page 4: At Max Contents

    Manuals Note: The spring clip must be 1st pin position engaged in the FIRST stem opening in order to access battery compartment. Warranty card If any part is missing, please contact Garrett Customer Service. Garrett Metal Detectors AT Max ™...
  • Page 5 Note that initial button press shows current setting. Backlight—Press the SHIFT button, then push the LIGHT button to switch the LCD backlight on or off. Use the backlight in low light situations for improved visibility of the screen. Garrett Metal Detectors AT Max ™...

  • Page 6: Target Information

    Target ID Cursor (Upper Scale)—Will display for every target, your preference. but will produce audio only for targets accepted on the Lower • Note that the AT Max's volume adjustments only affects Scale. the maximum audio produced by a large signal and does not Digital Target ID—Provides a value from 0 to 99 to identify...

  • Page 7: Selecting Modes (Discrimination Patterns)

    Mode. off. The factory preset for the CUSTOM Mode is the same as the In any of the modes, the AT Max's searchcoil must be in motion COINS Mode. Begin with this discrimination pattern and then to detect targets. Truly static detection is possible while using the use the NOTCH DISC (+) or (-) and ELIM buttons to customize the detector's Pinpoint pushbutton.

  • Page 8: All Metal Mode Audio Characteristics

    While in the ALL METAL Mode, the AT Max will respond to the entire range of conductive and magnetic properties encountered, including ground responses. The user is continuously hearing what the searchcoil is "seeing"...

  • Page 9: Tone Id In Discrimination Modes

    Non-ferrous targets (Digital ID > 75) with medium to high conductivity, including larger coins and jewelry. This fast recovery time helps the AT Max operator to separate adjacent targets. The proportional audio response which makes this possible also allows the user to better judge a target’s size, shape and depth.

  • Page 10: Notch Discrimination

    Example: Manual Modification of Notch Discrimination Pattern (Discrim Modes Only) Press SHIFT, then The AT Max has 12 pixels or "notches" of discrimination, shown use the NOTCH DISC on the lower scale. Any combination of these pixels can be buttons to position switched on or off based upon your preference.

  • Page 11: Sensitivity

    Threshold. Conversely, there may be times you wish to operate with a negative or silent threshold, for example, in order to reduce detector chatter, etc. Headphones are also highly recommended to maximize the ability to hear faint signals, particularly in noisy environments. 20 Garrett Metal Detectors AT Max ™...

  • Page 12: Ground Balance

    Ground Balance Mode) with whole numerals. Ground balance values from 75 to 99 represent hot ground, and at this point the AT Max utilizes High Resolution Ground Balance. Beginning at 75, the ground balance value begins increasing in quarter-point steps. This is represented MAN.
  • Page 13 "hot rocks, " terra cotta and clay bricks. Adjusting the AT Max to This Window or "spread" automatically adjusts while performing be ground balanced slightly positive may produce a weak but Auto Ground Balance.

  • Page 14: Iron Discrimination

    Iron Discrimination Detecting Targets in Trash with High-Res Iron Discrim IRON DISC Buttons—The AT Max features a high-resolution iron Illustration 1 discrimination adjustment. This additional resolution allows more precise control of how much iron discrimination can be applied. The level can be adjusted from 0 (no iron discrimination) to 44 (maximum iron discrimination).

  • Page 15: Iron Audio

    ON/OFF. When this feature is on the words "IRON AUDIO" appear on the LCD (as shown in the illustration above). The Iron Audio feature can be used in any of the AT Max's four modes. Its functionality in the three Discrimination Modes versus the All Metal Mode will be discussed separately.
  • Page 16 Iron Audio feature, conduct the following experiment using a The Iron Audio feature should be used in the All Metal Mode bottle cap and a coin. Start with the AT Max in Zero Mode, with as a means to check targets for iron content. Therefore, it is not Iron Disc set to 35 and Iron Audio off.

  • Page 17: Z-Lynk Wireless Operation

    Refer to "Underwater Operation" section of this manual for more information. PAIRING: Switch on headphones and hold within 2 feet of AT Max, then press and release Z-Lynk buttons (IRON AUDIO and FREQ) simultaneously. 32 Garrett Metal Detectors AT Max ™...

  • Page 18: Bench Tests

    Flat iron objects like bottle caps or steel washers can appear to be good conductive targets to detectors. To test the AT Max's advanced iron recognition abilities, conduct another bench test with an iron bottle cap. First, set the detector to the ALL METAL Mode, switch off Iron Audio and pass the bottle cap across the searchcoil at a distance of 3 to 4 inches (8–10cm).

  • Page 19: Hunting Tips

    Hunting Tips a Garrett exclusive feature that helps make the AT Max such a powerful detector. Next, switch to the COINS Mode, set IRON DISC to 35 and • If you are new to metal detecting, start searching in areas with switch off the Iron Audio feature.
  • Page 20 Continuous Wave (VLF) metal detector. Saltwater is conductive and produces signals similar to foil and fine jewelry. Although the AT Max is not specifically designed for saltwater use, it can be used in this environment. Proper ground balance is the most important step for stable saltwater operation.

  • Page 21: Pinpointing

    In order to detect a good target, first Accurate pinpointing enables fast recovery with the smallest hole ground balance the AT Max to the terra cotta or hot rocks that are possible. To use Pinpoint: present. Be aware, however, that the combined Target ID might be very low (e.g.
  • Page 22 Image B Note: Use of the Pinpoint button is demonstrated on the AT Max You can reverse this pinpointing technique to pinpoint off the training video, which can be seen at garrett.com.

  • Page 23: Underwater Operation

    When using the AT Max with its MS-3 wireless headphones, do not submerge the detector's control housing. Waterproof headphones (sold separately) must be used if the headset is fully immersed in water.

  • Page 24: Troubleshooting Guide

    If specifically hunting for coins, COINS mode should I’m not finding specific be your best choice to eliminate other undesirable targets. You cap to slide battery holder out. Remove batteries when the AT Max targets may also use the ZERO mode, which detects all metal targets to ensure desired targets are present.

  • Page 25: Metal Detecting Code Of Ethics

    Caring For Your Detector • I will always fill the holes I dig. Your Garrett detector is rugged, designed for outdoor use. However, as • I will not destroy property, buildings or the remains of deserted with all electronic equipment, there are some simple ways you can care structures.
  • Page 26 AT Max, contact the local retail outlet where your detector y compris celles pouvant entraîner un dysfonctionnement. was purchased. To avoid excessive shipping and import charges, do not attempt to return a Garrett product to the factory in the United States. Wireless Transmitter Specifications...

  • Page 27: At Max Accessories

    AT Max ACCESSORIES Garrett offers a complete line of accessories that will increase your success and enjoyment of treasure hunting with your new detector. These products—including optional AT Max searchcoils, fully submersible Garrett headphones, Garrett Pro-Pointer pinpointing detectors, Z-Lynk Wireless Receiver kits, and a wide selection of books on treasure hunting—are available from your dealer or by...

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