SPECIAL NOTICE The Garrett GTI™ 2500 metal detector with TreasureVision® and Graphic Target Analyzer™ truly adds a new dimension to treasure hunting. A precision electronic instrument that utilizes the miracles of high technology in its PowerMaster™ DSP circuitry to help locate coins, jewelry, gold nuggets or any other kind of metallic object, the GTI 2500 will accomplish more than any other detector manufactured.
This exciting One-Touch™ metal detector is automatic and surprisingly easy to operate. Yet those who have special demands will find the GTI 2500 meticulously adaptable to any personal style of treasure hunting. Microprocessor-controlled circuitry truly makes this the deepest-seeking detector known to man. Although the GTI 2500 is built to withstand rugged treatment outdoors while giving years of trouble-free service, always remember that this detector is a precision electronic instrument.
CONTENTS To The Owner ............................... 7 Assembly ...................................... 9 Touchpads....................................... 13 Display Screen................................. 18 TreasureVision................................. 20 Basic Hunting Instructions................. 23 Discriminate Mode............................ 29 Setting Discrimination (Notches).. ...... 34 Operating Settings............................ 39 Search Aids.....................................
Warning.................................................. 95 RAM Book Order Form..................... 97 Specifications................................. 99 Code of Ethics................................ 101 Patents...........................................
TO THE OWNER As the proud owner of a Garrett GTI 2500 with TreasureVision and Graphic Target Analyzer, you join a worldwide fraternity of treasure hunters who use Garrett detectors to find coins, jewelry, relics and gold nuggets worth millions of dollars. This manual describes basic functions of the GTI 2500 and explains how its target identification and sizing, deepseeking and discrimination capabilities can find treasure.
diately without interference from ground minerals. As the world's most intelligent detector, the GTI 2500 is preset at the factory to begin operations automatically in a Coins detection mode. Of course, you can easily adjust the instrument to operate in other Discriminate modes or in the All-Metal mode. When you find a target, Garrett's revolutionary GTA display instantly directs you to the range of targets on the Target ID Guide.
ASSEMBLY Your GTI 2500 is shipped complete in one carton: A B C D E F A. Control Housing B. Upper & Lower Stems C. 9.5” PROformance Imaging Searchcoil D. Parts Envelope E. Owner’s Manual and DVD F. Warranty Registration Card Make certain all of these parts are included and are undamaged. Report any shortages or damages to your dealer immediately. Follow these assembly instructions. No tools are required. Hand pressure will be satisfactory for all tightening.
C A B A. One (1) nut B. One (1) threaded bolt C. Two (2) washers 1. Attach the lower stem to the 9.5” imaging searchcoil. Make certain that the two rubber washers are inserted onto the lower stem (see below) before slipping the searchcoil onto it.
2. Place the threaded bolt through the holes in the connector and hand-tighten using the remaining wing nut (above left). Use no tools. 3. Depress buttons in the Control Housing stem and slide on the Upper Stem. 4. Depress the buttons in the Lower Stem and insert it into the Upper Stem (above right). Buttons will pop into the holes, and you can achieve the desired stem length. The third set of holes from the end is most commonly used. 5.
slightly loose (above left) so that the angle of the searchcoil can be changed easily, if required. Insert the cable connector into the connector on the control housing as shown (above right) and rotate the collar clockwise until secure (approximately four (4) turns). Hand tighten only. Your GTI 2500 is shipped with eight (8) AA batteries installed and is ready to use.
TOUCHPADS Power Turns detector ON and OFF; Returns the detector to factory settings. Menu/Scroll Allows the operator to scroll through the following settings to make adjustments or turn them ON or OFF. The scrollable selections vary whether you are in Discriminate (see A) or All-Metal (see B) mode. A.
Scroll button are: 5 selectable Discriminate Modes (use the + or - keys to select either Coins, Jewelry, Relics, Zero or Custom mode); Sensitivity; Threshold; Frequency; Volume; Tone; Search Aids (choose either Search Image, Surface Elimination or Salt Elimination); Audio (choose either Belltone or Bi-Level); and Rechargeable (battery). B.
Treasure Imaging (Pinpoint) When pressed and held, activates the automatic pinpointing function in either mode with signal strength shown on Upper Scale, depth of target on Lower Scale and size and depth of target on the Imaging Grid. Operate Returns to operate (hunting) mode after any change or adjustment of controls. Discriminate (Last Mode) When hunting in a Discriminate mode, returns detector to the previous Discriminate mode (Coins, Jewelry, Relics, Zero, Custom) that was being used.
+& These touchpads permit precise regulation of the GTI 2500. You will note that on certain Menu adjustments each press of a touchpad causes segments on the Lower Scale to move rather rapidly either to the right (+) or to the left (-). After 20 movements on the Lower Scale, an Upper Scale segment will move. This operation is similar to that of the decimal system. The (+) and (-) touchpads enable the following regulation: • Permit alternation between the five Discriminate search modes.
• Activate (+) or turn off (-) the Search Image and the Rechargeable battery gauge in either mode. • Move cursor in the Upper Scale when discrimination is being set in the Discriminate mode. • Permit adjustments to be made that achieve precise manual ground balance in the All-Metal mode. Experiment with these touchpads yourself and experience the precise degree of regulation possible with the GTI 2500.
Display Screen The complete operating status of your detector is shown on the screen at all times. When the TREASURE IMAGING (automatic pinpointing and sizing) touchpad is pressed and held, size and depth of targets will also be shown. The mode in which you are searching will always be shown on the left side of the screen under the SEARCH MODE heading. The word MENU, SEARCH or IMAGE is shown at the top of the screen in its center to indicate detector status.
when the detector is being regulated. SEARCH will be illuminated whenever you have pressed the OPERATE touchpad and are hunting, and IMAGE when you press and hold the TREASURE IMAGING touchpad. On the second line are the detector functions that you can regulate as desired: Sensitivity, Threshold, Frequency, Volume and Tone. When one of these functions has been illuminated by use of the MENU/ SCROLL touchpad, it can be regulated by pressing the (+) or (-) touchpads.
TREASURE VISION TreasureVision permits your GTI 2500's Display Screen to present Imaging by Garrett. Experience with TreasureVision will enable a hobbyist to identify targets to an amazingly precise degree before they are recovered. Target ID Guide This guide printed above the screen showing coin denominations, gold, silver and other typical metallic objects is designed to relate location of the Target Cursor with the Imaging Grid to help identify discoveries.
each side and the horizontal color-coded lines connecting them. These refer to the five relative sizes on the Imaging Grid. The example (page 20) shows a B-size object, with the cursor's location indicating it is probably a quarter. Coins are shown on Line B (red) since they will always be indicated as B-size targets.
in two-inch increments by the target's location on the grid. With the detector in its factory preset mode sizes and depths are shown only when the TREASURE IMAGING touchpad is pressed and held. When Search Image is being used, sizes and depths of all accepted targets will be shown as they are discovered. Size A—Solid small oval (orange): targets smaller than coins, including bits of iron or foil. Size B—Oval extending to B grid lines (red): all U.S.
BASIC HUNTING INSTRUCTIONS The next few pages of this Owner's Manual are all that you may ever need to read about your new Garrett GTI 2500. This OneTouch detector is today's most advanced; yet, its basic automatic operation makes it as simple to operate as any detector ever manufactured. You can begin hunting with it immediately. No special instructions are needed beyond what's included in the next few pages. More importantly, you can start finding coins and other treasures right now! Here's how.
as shown below. You can see that you are operating in the Discriminate/Coins detection mode with Belltone audio turned on. 3. Your GTI 2500 begins operating with all settings at factory-set levels. Any of the settings can be changed easily, but you may never want to do so. It is recommended that you use these settings the first 10 hours you hunt with your detector.
Scanning Swing the searchcoil back and forth in front of you in a straight line or slight arc as shown in the photograph below. Keep the searchcoil at a constant height of one or two inches above the ground while you scan at a rate of about one to three feet per second. Discovery Detection of all metal targets will be indicated by the appearance of a Target Cursor on the Upper Scale.
The above illustration shows a cursor at 9+, which would be a quarter if Treasure Imaging determines it to be a B-size target. Locate your target by scanning back and forth over it to determine where signals are strongest. Treasure Imaging Press and hold this touchpad to put your detector into a Pinpoint mode so that you can locate your target more precisely and also determine its relative size which will be shown on the Imaging Grid.
familiar with your new detector by hunting for at least 10 hours in the factory preset Discriminate/Coins mode and that you read carefully the Warning section in this manual. By now you are also certainly impressed with the super sensitivity, depth capabilities and the target analysis of this detector which utilizes DSP (Digital Signal Processing) to give it advanced detection capabilities found only in Garrett detectors with PowerMaster DSP.
tance away, one over which your searchcoil has not even scanned. Proper operating techniques will enable you to use the array of data presented by TreasureVision to become aware, however, of the precise nature of all these targets. You will quickly master these techniques and learn why the GTI 2500 with DSP, TreasureVision and controls based on patented microprocessor technology has more accurate discrimination and better sensitivity and effectiveness than any other detector ever manufactured.
DISCRIMINATE MODE Mode Selections When you touch the POWER touchpad, your GTI 2500 is ready to hunt in a Discriminate/Coins operating mode with threshold, sensitivity (depth), tone and other controls preset at the factory, as shown in the GTI Screen's upper center as you step through the Menu. As explained in the following pages, settings can be easily changed through regulation of the (+) and (-) touchpads.
In the Discriminate mode you can press MENU and use the (+) touchpad to rotate through five different modes of detection that are available, each with a specific discrimination configuration as shown on the Lower Scale. When the name of the particular mode you select is constant, while the other four are blinking, either press the OPERATE touchpad to begin hunting or the MENU touchpad to move to another control selection.
understand that they must dig some junk occasionally. Correct operation of the GTI 2500 should reduce this wasted effort. Jewelry This Discriminate detection mode, above, is specifically designed to aid in hunting for jewelry, with discrimination in the detector's circuitry set to eliminate such trash targets as lower conductivity items and bottle caps.
associated with hunting for relics, while including those in the lower conductivity range - items that are generally sought by most relic hunters. Zero This mode, permits you to hunt with no discrimination and offers a method of "dual-mode" hunting. Your detector will give an audible signal to announce almost every piece of metal it scans over while cursor(s) indicate them. You can then press Last Mode to return to another of the Discriminate modes to "quick-check" a target.
modify this mode to his or her individual specifications. These modifications will be retained by the detector's memory when it is switched OFF. Many GTI 2500 owners will never use the Custom mode, and when hunting in the Discriminate mode will use only the preset Coins, Jewelry, Relics or Zero modes. Complete instructions for setting discrimination notches for any of these modes can be found on the following pages of this manual.
SETTING DISCRIMINATION (Notches) Using only the discrimination of its factoryset Coins, Jewelry, Relics and Zero operating modes, the GTI 2500 will more than satisfy the discrimination requirements of almost every treasure hunter. Many will never require any other discrimination. Still, this detector offers more Custom discrimination to tailor a detection mode to any requirement by setting precise detection "notches." The Lower Scale contains Discrimination Segments.
First Method: While in the OPERATE mode press the (+) and (-) touchpads to position the blinking cursor above the Discrimination Segment corresponding to the particular target to be detected or ignored. If the segment is turned on (showing), that particular target will be detected. If you wish to reject that type target, press the ACCEPT/REJECT touchpad. The segment will be turned OFF and disappear, creating a "reject notch.
If the segment below is not showing, press ACCEPT/REJECT to turn it on. If it is showing, pressing this pad will turn it OFF. Remember: When you press the ACCEPT /REJECT touchpad, you cause the discrimination circuit to reject a target that is shown on corresponding segments of both the Lower and Upper Scales. This rejection will be indicated as the Lower Scale Discrimination Segment disappears. The same touchpad is used to cause the detector to accept a target.
Jewelry, Relics and Zero modes will be lost, since these four modes return to factory-set detection settings each time the detector is turned OFF and turned back ON. Your Custom mode discrimination settings will be lost only when POWER is held for five seconds to return the detector to its factory settings. Why Use Notches? There are numerous reasons why you would want to accept or reject specific targets: You may be looking for only one item—a certain lost earring, for example.
opportunities to test any and all your ideas and, to try them out easily and quickly. No other metal detector permits more accurate or precise discrimination. Factory Settings: Remember that you can return to preset factory settings at any time simply by pressing and holding the POWER touchpad for five seconds.
Operating Settings Sensitivity (Depth) Pressing the MENU touchpad to display SENSITIVITY on the screen (shown above with factory setting at approximately 75% as indicated on the Upper Scale). Use the (+) and (-) touchpads to adjust the depth to which your detector will operate most effectively. These changes will be shown on the Upper Scale as you make them.
control option permits you to achieve a stability that permits maximum detection depth possible in relation to any conditions. Press (+) to increase detection depth. Press (-) to decrease. A single touch and release adjusts the level in a small increment. A continuous pressing results in a continuous adjustment. Threshold Pressing the MENU touchpad to display THRESH on the screen (below, with factory setting indicated on Upper and Lower Scales).
You can search silently or at any level of constant sound. It is recommended that you always operate the instrument at a minimum level of audible sound. You can hear the audio increase sharply whenever a desirable target is encountered. (Remember, a cursor will indicate every target.) When headphones are used, it will usually be necessary to decrease the threshold level since sound is more audible through headphones.
together that their signals interfere with one another. Outside electrical or atmospheric interference can also cause interference that results in strange sounds. Whenever you hear unusual sounds and believe that you are encountering interference, press and release the MENU touchpad until FREQ appears on the screen, as shown in the illustration above. The Upper Scale will indicate the frequency at which your detector is now operating.
Use the (+) and (-) touchpads to adjust audio to the target sound volume that you prefer. Touching the (+) pad will make the sound louder, while touching (-) the will lower the volume. Since this adjustment controls the maximum volume of sound produced by the GTI 2500 when a target is encountered, it will not affect the threshold level you have already selected as the primary audio function of your detector.
Tone After using the MENU touchpad to display TONE on the screen, the factory tone setting will be indicated on the Upper Scale, as shown above. Use the (+) and (-) touchpads to adjust the audio to preferred pitch or tone. Touching the (+) pad will raise the tone into a higher treble range, while touching (-) will lower the pitch to a bass tone. All touches will make changes indicated on the Upper Scale. Experiment to find the pitch that suits your hearing.
SEARCH AIDS Search Image Use the MENU and (+) and (-) pads to display Search Image. If these words and the Imaging Grid are blinking, press (+) to turn it on. When this Search Aid is turned ON TreasureVision will constantly display the size and depth of accepted targets while you are searching. It therefore will not be necessary to use the Treasure Imaging to obtain size and depth information. You can press (-) to turn OFF the function and cause the words and the grid to blink.
If you desire to use this Search Aid, press the (+) and (-) touchpads to set the desired elimination depth. This depth (to 4 inches beneath the coil) will be shown on the Upper Scale and on the Imaging Grid. Salt Elimination When hunting on an ocean beach or in any area with high salt content, you may want to use this Search Aid to eliminate interference caused by wetted salt.
AUDIO CHOICES Belltone Garrett's Coin Alert Belltone™, which is the factory Audio setting for the GTI, will signal the operator with a special ringing sound whenever a target of high conductivity (first nine segments from right on the Upper Scale), such as a coin, has been located. Other acceptable targets will cause an audio increase. If you wish to use the Belltone audio enhancement for target sounds, no action is necessary at factory settings.
If you desire Bi-Level audio, use MENU to display Bi-Level and press the (+) touchpad to turn it ON. To turn off the function press and cause the letters to begin blinking. When both Belltone and Bi-Level are turned OFF, the detector searches with Standard audio. BATTERY CHOICES Battery Gauge The scale at the lower right of your GTI 2500's screen will indicate accurately the condition of standard (carbon or alkaline) or rechargeable batteries.
ALL-METAL MODE After you press this touchpad, the Graphic Display will indicate that you are operating in an all metal (deepseeking) mode. Garrett's exclusive Fast Track feature can be used to ground balance your detector automatically, and Auto Track can continually work to keep it ground balanced over varying soil mineralization conditions. In this mode it will be possible for you to let the searchcoil hover almost motionless over a target while listening for signals.
You will probably prefer to use this mode when searching for nuggets or at other times when highly mineralized ground is encountered. Because the All-Metal mode permits no discrimination, your detector will give an audible signal to indicate every piece of metal it scans over. Even though precise ground balance is adjusted automatically and continuously through Fast Track and Auto Track, it is possible to ground balance the detector manually.
decreased by using the (-) pad. With some extreme ground conditions the detector may not be able to achieve perfect ground balance automatically, but it will always adapt itself to the best possible solution.
OTHER SPECIAL FEATURES IN THE ALL-METAL MODE Because the following control functions are utilized in both the Discriminate All-Metal modes, instructions for their use can be found on the preceding pages: Sensitivity (Depth) Threshold Frequency Volume Tone Search Image Battery When your GTI 2500 is operated in the All-Metal Search Mode, there are two other settings—Manual Ground Balance and Auto Track—which are described below.
any degree because of ground conditions, more precise manual ground balancing may be required. You may also want to use the Manual Ground Balance function to ground balance slightly positive to enhance gold nugget detection or balance slightly negative to reduce "hot rock" detection. Use the MENU touchpad to display MANUAL GROUND BAL on the screen. Raise and lower your searchcoil and listen closely to the audio signal. If the sound grows louder as you lower the coil, press the (-) pad several times.
Press the proper (+) and (-) pads until audio does not change or changes only slightly when the searchcoil is lowered to operating height. The Ground Balance value that you have set for the detector will not change as long as Auto Track remains turned OFF. Whenever Auto Track (see below) is operating, it will govern the ground balancing function of the GTI 2500. When searching over extremely mineralized soil, it is recommended that you hold the searchcoil at least two inches or more above the ground.
or those that change only slightly as you move along. Increase the tracking speed as necessary to cope with varying ground mineralization. Fast tracking speed allows operation over severe ground conditions, such as heavily mineralized rock slides. To use Auto Track, scroll through All-Metal menu selections until Auto Track appears on the screen. You can then use the (+) pad to increase the tracking speed which will be indicated on the Upper Scale.
even when the batteries are removed. The detector must be turned OFF when batteries are being changed, as discussed in the Battery Section. Changes in discrimination settings, however, will be retained only in the Custom mode. Because ground conditions can vary from place to place, it may be necessary for you to adjust Sensitivity (Depth) occasionally.
Treasure Imaging When you are hunting with the Search Image aid turned OFF, you will be given size and depth information only when you press and hold the TREASURE IMAGING (Pinpoint) pad. The relative size and depth of targets will then be indicated on the Imaging Grid. While this pad is being held, the 9.5” searchcoil can remain stationary over your target. Move the coil slightly to make certain that it is directly over the target. Targets must pass beneath the searchcoil, not above it.
effective normal automatic pinpointing (when Search Image is not being used), place the searchcoil on the ground near, but not over, the target in an area where there are no other targets. Press the TREASURE IMAGING touchpad and scan back and forth across the target, maintaining contact with the ground. Read the following sections to learn how size and depth indications will change as you pinpoint.
Size/Depth on the Imaging Grid As you are locating your target precisely by moving the searchcoil while pressing and holding the TREASURE IMAGING touchpad, you will observe size and depth changing on TreasureVision's Imaging Grid. The coil must be centered directly over the target to produce accurate size and depth information. As you approach the target, therefore, its indicated depth on the Imaging Grid will become shallower and its size smaller.
Four typical examples: 60 - Garrett Metal Detectors
Graphic Target Imaging 2500 - 61
"Cone" Effect You may occasionally observe a size and depth reading like that shown above which Garrett engineers call the "Cone." Such a reading with multiple indications of size and depth indicates that the detected target is too deep and/or too small to determine an exact size and depth. It is likely, however, that the target is within the size and depth region defined by the Cone.
A at 6"; a Size B at 8"; a Size C at 10"; or a Size D at 12". The Cone may also appear when the target is significantly off-center from the coil.
BENCH TESTING This will enable you to test typical treasure and trash items and to learn about your GTI 2500 before taking it into the field or trying to set discrimination. Tests should be performed as shown with the searchcoil perpendicular to a bench, floor or other non-metallic surface and several feet away from any large metallic object: 1. Select the All-Metal mode of operation. Bring various metallic targets across the bottom of the searchcoil at a distance of about two inches.
the sound to increase, which represents true non-discriminating operation. 2. Press the DISCRIMINATE touchpad and use the MENU, (+) and (-) touchpads, as necessary, until Coins is no longer blinking. Then press OPERATE. Bring the same targets across the bottom of the searchcoil in this Coins/Discriminate mode and listen for the sound to increase only when certain items are scanned. Notice the specific segments in the Upper Scale that darken when various targets are scanned across the coil. 3.
FIELD OPERATIONS As you walk, scan the searchcoil from side to side in a straight line in front of you. Keep the coil level and at a constant height of one or two inches above the ground while you scan at a rate of about one to three feet per second. When scanning, do not hurry. Be methodical. Do not skip any areas. Overlap each scan sweep at least 25% of the searchcoil's width. Wear headphones for greater sound perception and concentrate on your scanning.
OFF and make your initial target decisions based on the conductivity indications of the cursor as they relate to the Target ID Guide. When you decide a target is worthwhile, press and hold the TARGET IMAGING touchpad and what you have just discovered can often be determined by relating the size of your discovery as shown on the Imaging Grid with the Target ID Guide. The searchcoil must be centered over your target to produce accurate size and depth information.
Highly mineralized soil can occasionally result in improper target size/depth information. Raising the coil an inch or two as you scan over such soil is sometimes helpful. Encrustation or patina may also affect conductivity of the target, resulting in improper classification. Using Search Image Experienced treasure hunters prefer to use the GTI 2500 with the Search Image aid turned ON, providing a constant display of size and depth information.
relate to the ID Guide above. Now watch the Imaging Grid as you continue to move the searchcoil to locate your target more precisely. Target indication on the Grid will become smaller and shallower until your coil is centered precisely over the target. If you move away from it, the indication will get deeper and larger. Always remember that the correct size and depth reading on the Imaging Grid will be the shallowest and smallest achieved when the coil is scanned directly over the target.
Digging Since the final step in recovery usually entails digging, always make as small a hole as possible. It is quicker, requires less work and makes refilling easier. And, you should always fill your holes. Discriminate (Last Mode) Use of this touchpad can be particularly helpful while scanning because it effectively converts your GTI 2500 into an instantaneous dual-or triple-mode detector.
simplify audio detection by eliminating virtually all targets as deep as the first four inches beneath your coil, where most trash metal will be found. When a metallic object is accepted, the detector's sound will, of course, increase from your threshold level. Some rejected targets, however, may cause the audio to "break up" or sound erratic.
at 100% of its speed capacity. Outside electromagnetic interference and irregular ground mineralization may sometimes require that you search at reduced detection depth. Don't worry about losing "deep targets!" You won't ever be losing anything because you'll always be able to search as deeply as ground and atmospheric conditions permit.
a pull tab, a bottle cap and several coins at varying depths of 1-4" about 18" apart. Clearly mark where each article is buried. Scan over them while carefully listening to and studying the different detection signals. Remember that newly buried objects, especially coins, will be somewhat more difficult to detect than items buried for some time. This is primarily a metallurgical phenomenon. Experiment with various detection modes, and pay close attention to both audio and GTI 2500 signals as you scan.
Charles Garrett's advice to press only one touchpad and search in the factory preset Discriminate/Coins detection mode for at least 10 hours during your "learning" phase. Remember, the more you use your detector in the correct manner the more treasure you will discover.
HEADPHONE JACK The headphone jack is located at the rear of the battery pack under the armrest. Headphones are a valuable accessory for any metal detector to mask interference from outside noise. They permit you to hear small and deep targets that might be missed when using only audio from the detector speaker. Headphones are particularly essential when you are hunting where noise (running water, people, surf, traffic, etc.) is excessive.
SEARCHCOILS Your GTI 2500 is equipped with a 9.5” PROformance imaging searchcoil suitable for searching for almost any kind of target in any terrain. A 12.5" Imaging coil is also available. You can also use conventional 4.5" and 12.5" coils or a 5x10" elliptical coil with the GTI 2500. The larger coil is helpful in seeking large and deep targets, while the smaller and elliptical coils are designed for use in especially trashy locations or places where a larger searchcoil just won't fit.
BATTERY INFORMATION The GTI 2500 is equipped with two battery packs, each holding four (4) standard AA batteries. The detector is also designed to utilize rechargeable (NiMH) batteries. It is recommended that top quality heavy duty or alkaline batteries be used. It is advisable to remove the battery packs when the detector is not in use, particularly for a period of several weeks.
when fully charged batteries are being used. You should always carry spares so that you will be ready when the battery condition squares show only one square remaining. Rechargeable Batteries When rechargeable batteries are being used, the Rechargeable battery option must be turned on for the battery level indicator to be accurate. To turn on this option press the MENU touchpad until Recharge is displayed. The option is turned off at the factory setting, and the word will be blinking.
the armrest. Slip up the two covers on the battery panel (shown in above drawing) and remove them completely. 4. Take out the two battery holders (which are not connected by wire) by tilting the pack. 5. Press out the old batteries. 6. Install new batteries. Carefully observe polarity of the batteries and make certain the new batteries are aligned properly.
7. Replace holders in detector as shown above. It is important that the "eyelets" be toward the center. If an effort is made to install holders incorrectly, closure will be difficult. If it is forced, however, damage to the detector can result. Battery packs must be replaced in their proper orientation. 8. Press down firmly and slide each battery cover back in place. Remember: The detector must be turned off when batteries are being changed.
or heavy duty carbon batteries. RECOMMENDED ACCESSORIES Your Garrett GTI 2500 represents the highest quality in metal detector manufacturing. Complement it with quality accessories such as these from Garrett: Headphones that will enable you to hear signals from the GTI more distinctly because they will mask other conflicting sounds from the environment. Coin Hunter Kit (pouch, probe, digger) that is all you need for recovering coins. Coil Cover to protect your 9.5" searchcoil and lengthen its lifespan.
MAINTENANCE Always remember that your GTI 2500 is a sensitive electronic instrument. It is built to withstand rugged treatment in the outdoors. Use your Garrett detector to the fullest extent possible, and never feel that you have to baby it. Yet, always protect the detector and handle it with reasonable care. Try to avoid temperature extremes as much as possible, such as storing the detector in an automobile trunk during hot summer months or outdoors in sub-freezing weather. Keep your detector clean.
SPECIALIZED HUNTING Coins Because of its unique discrimination and imaging capabilities, the GTI 2500 functions as an outstanding coin hunting detector, especially in its Discriminate/Coins mode. Deepseeking capability and the depth, size and conductivity information available from DSP circuitry combined with TreasureVision and the GTI 2500's ease of handling make this a superb instrument for finding coins. In addition, target sizing presents a second dimension in discrimination.
detection by factory-set discrimination. You can then use the ACCEPT/REJECT touchpad to eliminate these pesky pieces of junk, no matter which Discriminate mode you are using. Just move your searchcoil across one of them, watch your Upper Scale for its response and push the ACCEPT/REJECT touchpad. The Lower Scale notch vanishes, and you'll have no more trouble from that type of trash metal.
to double-check the target. Some hobbyists even set up a discrimination notch by blanking out all segments on the left half of the scale. For literature explaining more about coin hunting see the Recommended Reading section of this Owner's Manual. The New Successful Coin Hunting is especially recommended. An Order Blank is included in the back of this manual, or you can call Garrett direct at 1-800-527-4011 to purchase by credit card.
2500 with intricate circuitry that cancels out mineralization to permit sophisticated ground balancing can be used to find this gold or any other precious metal. It must be emphasized, however, that even the GTI 2500 or any quality detector is usually operated only in the All-Metal mode and very precisely ground balanced if gold is to be found. The new Fast Track and Auto Track are quite satisfactory, even in extremely mineralized soil, but manual ground balancing is always possible.
eralization could also limit detection depth when searching in the Discriminate mode. There is a way, however, to let the precise discrimination possible with the GTI 2500 help you find gold even though discrimination usually limits the amount of small nuggets found. There are some highly productive areas, however, that contain so much iron trash that a small amount of discrimination becomes highly desirable, even necessary.
prospector, whether veteran or weekend adventurer. A "hot rock" can be described as a concentration of non-conductive iron mineral that causes a detector to recognize it as metal when operating in the All Metal mode. When you suspect that you have a signal from a hot rock, locate the target precisely by pinpointing. Then, move your searchcoil away and press the DISCRIMINATE touchpad. You should use the Discriminate / Zero setting which offers no discrimination.
where it is known to exist. Relics Relics of all shapes and sizes can be found with a GTI 2500 when you hunt in its RELICS mode. This mode is especially designed to eliminate those nuisance targets most often encountered in relic hunting. You may also want to search in the ALL METAL or ZERO Discriminate modes, but you must be prepared to dig metallic trash since you will detect all metal targets in these modes.
REPAIR SERVICE In case of difficulty, read this Owner's Manual again thoroughly to make certain your Garrett GTI 2500 is not inoperable because of wrong adjustments or improper operating methods. Your dealer may also be able to offer advice. Remember that computerized circuitry of this detector permits you to restore instantly all of its precise factory settings. Simply hold down the POWER touchpad for five (5) seconds.
You have checked with your dealer. You have tried to restore factory settings. You have carefully packed the detector in its original shipping carton or other suitable box. Make certain that proper insulation or packing material is used to keep all parts secure. Do not ship stems, headphones or armrests unless they are part of the problem. Be certain to return all coils, unless the problem is mechanical. Ship to: Garrett Metal Detectors 1881 West State Street Garland, TX 75042.
equipment will be returned UPS or parcel post unless you give written authorization to ship collect by air parcel post, UPS Blue (air) or air freight. Special Notice to Foreign Customers: Customers outside the United States must contact the retail outlet where their product was purchased to arrange for repair or warranty service.
RECOMMENDED READING Since your Garrett GTI 2500 is a truly universal detector, all of the RAM books will be pertinent to its use. Of particular interest, however, will be the revised version of Garrett's popular Modern Metal Detectors, a basic text that will help you to understand all types of metal detection equipment and how to use them. A special section of the revised edition is devoted to the use of One-Touch computerized detectors.
book also includes much good information about One-Touch detectors such as the GTI 2500. You will also be interested in The New Successful Coin Hunting, filled with "how to" tips and success stories about coin hunting. Since the GTI 2500 is such an excellent detector for hunting for gold nuggets and ore veins, you will be interested in Find Gold with a Metal Detector. All hobbyists are urged to familiarize themselves with this most interesting and exciting aspect of metal detecting.
WARNING! Any metal detector may discover underground power lines, explosives or other items which when struck could cause personal injury. When searching for treasure with your Garrett GTI 2500, observe these precautions: • Do not hunt in an area where you believe there may be shallowly buried underground electric lines or pipes. • Do not hunt in a military zone where bombs or other explosives may be buried. • Avoid striking any line known to be or suspected to be carrying electrical power.
- Garrett Metal Detectors
RAM BOOKS ORDER FORM Please send me the following RAM books: (Please indicate number of copies desired.) ___ New Successful Coin Hunting.....................$9.95 ___ Treasure Hunting for Fun and Profit..........$9.95 ___ Treasure Caches Can Be Found.................$9.95 ___ Ghost Town Treasures.................................$9.95 ___ You Can Find Gold with a Metal Detector.....$9.95 ___ Buried Treasures You Can Find................$14.95 ___ Gold of the Americas..................................$9.
MAIL-IN ORDER FORM Add $2.00 for first book, and $1.00 for each additional book ordered (maximum $3.00) for handling and shipping charges. Total for books $______________ 8.
SPECIFICATIONS • Detector Type: Very low frequency, transmitter / receiver, TreasureVision Graphic Target Analyzer and Imaging Grid for precise target identification, multiple notch discrimination • Controls: Easy access touchpads • Display: High visibility LCD adjacent to touchpads; data accessible at any angle • Detection Frequency: 7.
• Audio Frequency: 275 to 710 Hz • Batteries: Eight (8) AA • Battery Life: (Approximate) Alkaline: 35 hrs. Carbon Zinc: 25 hrs. Rechargeable: 25–35 hrs. • Humidity: 0 to 95% Non-condensing Temperatures: Operating: 0 to 130ºF. Storage: -20 to 150ºF. • Construction: Aluminum and high strength glass-filled nylon with handlemounted control/display panel. • Weight: (With 9.5 searchcoil) 4 lbs., 8 ozs.
CODE OF ETHICS Filling holes and obeying no trespassing signs are but two requirements of a dedicated metal detector hobbyist. A sincere request that Charles Garrett makes to every user of one of his detectors is that each place searched be left in a better condition than it was found.
buildings and will always fill holes I dig. • I will not destroy property, buildings or the remains of ghost towns and other deserted structures. • I will not leave litter or uncovered items lying around. I will carry all trash and dug targets with me when I leave each search area. • I will observe the Golden Rule, using good outdoor manners and conducting myself at all times in a manner which will add to the stature and public image of all people engaged in the field of metal detection.
Patent Protection Garrett's high tech instruments are protected by one or more of the following United States Patents and other Patents Pending: 4,398,104, 4,423,377, 4,303,879, 4,334,191, 3,662,225, 4,162,969, 4,334,192, 4,488,115, 4,700,139, 4,709,213 Design 274,704 and 297,221 G. B. Design 2,011,852 Australia Design 111,674. Other patents pending. All Garrett detectors are manufactured in the United States of America. ©2008 Garrett Metal Detectors All rights reserved.
Garrett Metal Detectors 1881 W. State Street Garland, TX 75042 T: (972) 494-6151 F:(972) 494-1881 1.800.527.4011 (U.S. and Canada) sales@garrett.com www.garrett.
- Garrett Metal Detectors
OPERATING INSTRUCTIONS: GTI 2500 ASSEMBLY INSTRUCTIONS: 1. Compress the button ends of the spring clip and insert, button end first, into the lower stem of the detector so that the button ends pop out of the holes. The spring clip is installed at the factory in the upper metal stem. This will enable the stem assembly to be attached to the electronic housing and the over all length of the detector adjusted for a comfortable operating length. 2.
Allows the operator to scroll through the following menu items to permit making manual adjustments for personal preferences: In both Discriminate and All-Metal mode: • • • • • • • • • Sensitivity (Depth) Threshold (Audio Level) Frequency Volume Tone Search Image Talk (Voice) Battery Indicator Back Light In Discriminate mode only: • • • • • 5 Modes—Coins, Jewelry, Relics, Zero, Custom Surface Elimination Salt Elimination Belltone Audio Bi-Level Audio In All-Metal mode only: • • Manual Ground Balance Aut
Discriminate (Last Mode): Returns the detector to the last previously used operating mode when operating in the Discriminate mode. When hunting in the All-Metal mode, activates the Discriminate mode that was last being used. Treasure Talk: Permits Treasure Talk on demand when a target is detected. Pressing this pad will cause the voice to give the Upper Scale ID number, size and depth of the target last detected.
3. • • • Lower Scale Discrimination segments indicate notches Indicates coin depth in inches when in Treasure Imaging. Indicates five levels of control settings. Imaging Grid: Five target sizes are shown on the color-coded Grid with depth indicated in 2-inch increments by the targets location on the grid. The sizes and definitions are: Size A—Targets smaller than coins, including small bits of trash or foil. Size B—All US coins and most rings and small metal trash such as bits of pulltabs.
2. Try to locate the target precisely by scanning back and forth over the target to determine where signals are loudest. 3. Notice all indications on the LCD Display above the touchpad and try to identify the target before digging it up. Treasure Imaging: (Pinpoint) Press and hold this touchpad so that you may locate your target more precisely and also determine its relative size and depth.
Coins: Discrimination is preset to eliminate detection of lower conductivity trash items such as pulltabs and bottlecaps. Jewelry: Specifically designed to eliminate trash targets and bottlecaps. Relics: Specifically designed to eliminate only those very small lower conductivity items that plague relic hunters. Zero: No discrimination is programmed into this mode, so essentially every metal target will give an audio response. Custom: This mode is designed to be user-set.
OPERATIONAL SETTINGS Press Operate to set your changes after they have been made. Treasure Talk will report all setting levels as each function is selected and/or changed. Discrimination Mode: All changes will be reported audibly by the detector's voice function and all adjustments are made using the Menu/Scroll touchpad. These changes are visibly shown on the Upper and/or Lower Scales also. Sensitivity (Depth): Use the + or - touchpads to adjust the depth (Sensitivity) from your current setting.
Bi-Level: Two noticeably different audio sounds are produce when this function is turned on. A standard audio response is given for all targets of a high conductivity than that of a US nickel. Nickels and lesser conductive targets cause a lower audio tone. This function is turned on or off by use of the + or - touchpads. If neither Belltone nor Bi-Level audio is selected, the detector will operate with only Standard audio.
and then lower it toward the surface to operating height. Listen closely to the audio sound. If the sound increases press the (–) touch pad one or twice. Raise the coil and then lower it again. Do this until the audio sound remains the same or changes only very little. If the sound decreases the some procedure is done using the (+) touchpad. When the audio sound has little or no increase or decrease press operate to begin hunting or select to move to another function.
recommended that only high quality standard, alkaline, or rechargeable batteries be used. It is advisable to remove the battery holders from the pack and the batteries from the holders when the detector is not in use, particularly for a period of weeks. The detector should operate 10 to 15 hours with carbon or rechargeable batteries and a longer time with alkaline batteries. After replacing the batteries perform the factory reset procedure.
METAL touchpad while scanning the searchcoil for only a few seconds in a normal manner. Release the touchpad and Auto Track will continue to track ground minerals and instantly make all necessary adjustments. SETTING DISCRIMINATION: The GTI 2500 features fully adjustable notch discrimination. It offers multiple selectivity and the ability to reject and accept targets in both the ferrous (iron) and non-ferrous ranges.
popular size used by coin hunters and for general searching over parks, playgrounds and beaches. For an area known to produce coins, rings and jewelry, this searchcoil should be used for initial searching. The 4.5” Non-Imaging searchcoil, offers the ability to recover coins and other valuable objects from areas with large amounts of buried metal trash or in areas adjacent to such metal as playground equipment, fences and buildings. While Imaging is not possible, the 4.
Caution: When operating on ocean beaches where salt is found, do not attempt to hunt in the All Metal mode that requires ground balancing. Even though the Zero Discrimination mode automatically adjusts ground balance, we suggest the Salt Elimination Search Aid be selected to reduce any response the wet, salted sands. Hunting in trashy areas: Use of Garrett’s 4.5” searchcoil can aid tremendously in the search for coins in areas with large accumulations of metal trash.
searching in the Zero Discrimination mode and the Salt Elimination Search Aid turned on all targets are accepted, salt is ignored and large nuggets are detected. Never attempt to operate any large searchcoil too close to heavy salt or extremely negative ground minerals. Maintain an operating height of approximately three to eight inches. OPERATING RECOMMENDATIONS As you operate and use your Garrett detector, you will quickly grow more proficient in its use.
REPAIR SERVICE In case of difficulty, read this Owner’s Manual again thoroughly to make certain your detector is not inoperable needlessly. Your dealer may also be able to offer advice. When your detector must be returned to the factory for service, always include a letter that describes its problem as fully as possible. Before you return your detector to the Garrett factory, make certain: You have read this Owner’s Manual carefully. You have followed the factory reset procedure.
I will respect private and public property, all historical and archaeological sites and will do no metal detecting on these lands without proper permission. I will keep informed on and obey all laws, regulations and rules governing federal, state and local public lands. I will aid law enforcement officials whenever possible. I will cause no willful damage to property of any kind, including fence, signs and buildings and will always fill holes I dig.
Detector Trade International GmbH & Co KG www.detector-trade.de info@detector-trade.de +49 (0) 2133 97 90 20 Hamburger Str. 17 41540 Dormagen Germany www.facebook.com/dtigmbh www.twitter.com/detectortradein www.youtube.
