Garrett Metal Detectors GTAx 550 User Manual

THANK YOU FOR CHOOSING GARRETT METAL DETECTORS!
Congratulations! As the proud owner of the Garrett GTAx 550™ you have joined an international family of treasure hunters. Men, women and children alike have used their Garrett detectors to find coins, relics and gold nuggets that are valued in the millions of dollars. So, to get the most out your GTAx 550 and treasure hunting experiences be sure to carefully read through this Owner's Manual!
Your GTAx 550 is engineered with microprocessor based technology and is backed by 40 years of metal detection research and development by Garrett's leading team of engineers. It is remarkable in its ability to locate coins, jewelry and other metallic objects at exciting depths. And with Garrett's revolutionary Graphic Target Analyzer (GTA™) display that offers
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target acceptance / rejection, precise discrimination and other key information, you can spend more time digging treasure and less time digging trash!
The GTAx 550 is factory preset to begin operation in the COINS mode. Simply press the POWER touchpad on your new GTAx 550 and immediately begin hunting without the troublesome interference from typical trash items or ground minerals. Of course, you can easily adjust the detector to operate in its other hunting mode.
Thank you for choosing Garrett Metal Detectors! Again, welcome to our treasure hunting family. In becoming a part of this great tradition and hobby, you have made the right start to successful treasure hunting.
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TABLE OF CONTENTS
GTAx 550 6 Parts 7 Assembly 8 Features 11 Target ID Legend 11 Upper Scale 12 Lower Scale 12 Batt (Battery) 13 Hip Mount 13 Touchpads / Controls 15 Power 15 Pinpoint 16 Set Depth 16 Accept / Reject 18 Set Audio 18
- and + 20 Hunting with the GTAx 550 21 Pinpointing 22 Coin Depth Measurement 24 Proper Scanning Techniques 25 Junk Targets 28
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Making Adjustments 29 Mode A (Zero Discrimination) 31 Mode B (Coins) 31 Setting Discrimination 32 Bench Tests 36 Test Plot Construction 38 Headphone Jack 39 Batteries 40 Searchcoils 43 Recommended Accessories 44 Maintenance 45 Specialized Hunting 46 Service & Repair 49 Recommended Reading 51 RAM Books Order Form 53 Specifications 55 Mind Your Manners! 57 Warning! 58
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GARRETT GTAx 550™
Lower
Stem
Searchcoil
Knob
Washer
Threaded
Bolt
Upper
Spring
Clip
S-shaped
Ramrod Stem
Handle
Grip
Stem
Detector
Stand
Control
Housing
LCD
Screen
Touchpad
Controls
Padded
Arm Cuff
Headphone
Jack
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PARTS
Before assembling your
GTAx 550 metal detector ensure you have the complete set of parts, which include:
• Control Housing w/ S-Ramrod Stem
• Upper Stem
• Lower Stem with Spring Clip
• Two (2) Mounting Washers
• One (1) Wing Nut
• One (1) Threaded Bolt
• Searchcoil with Cable
• Instruction Video (not shown below)
• Warranty Registration Card If any part is missing, contact your local dealer.
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GTAx 550 ASSEMBLY
No tools are required to assemble the
GTAx 550.
Hand tighten all necessary parts.
1. Press the two Mounting Washers into the Lower Stem. Figure 1.
Figure 1
2. Slide the searchcoil onto the Stem. Figure 2
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Figure 2
3. Insert the Threaded Bolt through the holes of the Lower Stem and Searchcoil. Hand-tighten the searchcoil assembly with the remaining Wing Nut. Figure 3.
Figure 3
4. Depress the Spring Clip and insert the Control Housing into the Upper Stem.
5. Depress the Spring Clip in the Lower Stem to adjust to the most comfortable operating length. Figure 4.
Figure 4
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6.Wrap the Searchcoil cable snugly about the stem with the first turn of the cable over the stem. Figure 5.
7. Insert the Cable into the Connector of the Control
Figure 5
Housing and hand-tighten. Figure 6.
Figure 6
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FEATURES
GTAx 550 is designed with Garrett's exclusive
The Graphic Target ID technology, which indicates the probable identity of a target along a horizontal scale that reads from low conductive metals (e.g iron) on the left to high conductive metals (e.g. silver) on the right.
1. Target ID Legend - A Target ID Legend is located directly above the LCD screen and indicates commonly found targets and metals. When a target
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is detected, the Target ID cursor will appear below the word or symbol that most likely indicates the type of target found, based on its conductivity.
2. Upper Scale - The Upper Scale has four purposes:
• Indicates target discovered
• Indicates levels of settings
• Indicates maximum pinpoint signal
• Indicates the cursor's location for changing discrimination notches
3. Lower Scale - The Lower horizontal scale, or Notch Discrimination Scale, indicates the discrimination pattern where the
GTAx 550 will or will not produce an audible signal when a target is located. No audible signal will be produced when a target is located where a notch (regions of Lower Scale where no segments are visible) is present.
The Lower Scale also indicates Coin Depth when pinpointing.
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5. BATT (Battery) - Battery condition is reported continuously by the horizontal row of squares on the lower right of the GTA display. Four are visible when fully charged batteries are being used. When only one square remains, battery life is two hours or less. Although it is not necessary to change batteries until this warning flashes, you should always have spares so that you will be ready. When using rechargeable batteries, only three squares will generally be illuminated with fully charged batteries. However, when only one square is visible, battery life has diminished to two hours or less.
6. Hip Mount - Hip mount adaptability is built into the 550. Since no extension cable cord is required, you never have to worry about winding it around the detector's stem or carrying it with you.
When you slip off the hip mount battery pack and attach it to your belt with the built-in clip, you reduce the weight of your detector by almost a pound. The cable cord is conveniently coiled to prevent tangling. When you use this hip mount feature the detector
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weighs less than 2 pounds. Yet, all of the controls are still easily accessible and your
GTAx 550 display is visible on the control stem of the detector.
The removable hip mount pack and built in coiled cable permit easy reassembly for carrying and storage.
When reassembling, make certain the coil cored slides into its tube and is not pinched in any way between the armrest and battery compartment.
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TOUCHPADS / CONTROLS
1 .
POWER - Press and release the POWER touchpad
to turn the detector on and off.
Note: After turning the detector off, wait 3 to 5 seconds before turning on again.
The POWER touchpad can also be used to reset all settings to factory preset by pressing and holding for 5 to 10 seconds, or until the detectors beeps.
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2. PINPOINT (Coin Depth) - Activates pinpointing function and indicates depth of coin-sized targets on the Lower Scale of the Graphic Display.
3. LAST MODE - Returns the detector to the operating mode previously used. This touchpad can be particularly helpful while scanning because it effectively converts your GTAx 550 into a dual mode detector.
NOTE: Pressing and releasing the touchpad makes it easy to alternate between the A and B Modes.
4. SET DEPTH (Sensitivity) - Permits using the + and - touchpads to regulate depth (sensitivity) of the detector. When the Depth touchpad is pressed, the display screen will appear with factory settings at approximately 75%, as indicated on the Upper Scale. You can use the + and - touchpads to adjust the depth (sensitivity) to which your detector will operate effectively.
After pressing the Depth touchpad, press (+) to
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increase depth and sensitivity; press (-) to decrease. A single touch and release adjusts the level in a small increment. A continuous pressing results in a continuous adjustment. When you have made your adjustment, press Depth again to reenter your previous operating mode.
Although maximum depth is usually desired, any detector's circuitry may be limited by the type of soils over which you are scanning, electromagnetic or power line interference, etc. Such considerations as ground mineralization will also inhibit the detector's ability to interpret target information. This Depth (Sensitivity) control option permits you to regulate sensitivity. This will result in achieving the maximum detection depth possible in relation to any existing condition.
Garrett engineers designed your
GTAx 550 for maximum detection depth power, but you may not always be able to operate at a depth setting of 100%; the same way you wouldn't operate your automobile at 100% of its speed. Outside electromagnetic
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interference and irregular ground mineralization may sometimes require reduced sensitivity which usually results in less detection depth.
Do not worry about losing "deep" targets when you reduce this setting. You will not lose any depth since you will always be operating as deeply as soil conditions permit.
Attempting to operate above a sensitivity level that permits a quiet and stable audio threshold may actually cause you to miss deep targets you would have found had you not "pushed" the detector.
5. ACCEPT / REJECT - Permits acceptance or rejection of specific target segments shown on the Lower Scale to establish discrimination notches.
6. SET AUDIO - Permits using the + and ­touchpads to regulate the audio threshold. When the audio touchpad is pressed, the display screen will appear, use the (+) and (-) touchpads to adjust the threshold of sound that is constantly being
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