Garrett Metal Detectors Radar Detector GTI 1500 User Manual

TM  
TM  
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SPECIAL NOTICE  
The Garrett GTI 1500 metal detector  
with Treasure Imaging and Graphic Target  
Analyzer truly adds a new dimension to  
treasure hunting. A precision electronic  
instrument designed to utilize the miracles  
of high technology, especially to help find  
coins, the GTI 1500 will accomplish this  
task better than any other detector ever  
manufactured. It can also locate jewelry,  
gold nuggets or any other kind of metallic  
object.  
Deep-seeking sensitivity and precise dis-  
crimination enable this marvelous instru-  
ment to identify targets by size as well as  
conductivity and to report actual depth of  
targets of any size, not just coins.  
This exciting One-Touch metal detector is  
automatic and surprisingly easy to oper-  
ate. Yet those who have special treasure  
hunting demands will find the GTI 1500  
meticulously adaptable to any personal  
style of detecting. Microprocessor-con-  
trolled circuitry truly makes this an excep-  
tionally deep seeking detector.  
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Although the GTI 1500 is built to with-  
stand rugged treatment outdoors while  
giving years of trouble-free service, always  
remember that this detector is a precision  
electronic instrument.  
Protect it from extreme heat and cold as  
well as mist, rain or blowing sand. Keep it  
as clean as possible.  
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CONTENTS  
To The Owner  
Assembly  
6
9
Touch pads  
Graphic Target Display  
Hunting Basics  
Operating Adjustments  
Control Settings  
Search Aids  
Operating Modes  
Setting Discrimination (Notches)  
Treasure Imaging  
Bench Testing  
Operating Recommendations  
Headphone Jack  
Searchcoils  
Batteries  
Recommended Accessories  
Maintenance  
Specialized Hunting  
Repair Service  
Recommended Reading  
RAM Book Order Form  
Specifications  
Mind Your Manners  
Trademarks/Patents  
Warning!  
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TO THE OWNER  
As the proud owner of a Garrett GTI 1500,  
you enter a new and exciting world of  
treasure hunting. Treasure imaging and  
the Graphic Target Analyzer enable you to  
find coins with an ease that will take your  
breath away. You will spend your hobby  
hours in recovering treasure, not digging  
trash.  
Study this Manual to learn the basic func-  
tions of your new GTI 1500. Its target  
identification and sizing, deep seeking and  
discrimination capabilities can find coins  
and any other kind of metallic treasure  
with an ease that will amaze and delight  
you.  
Use Treasure Imaging to identify the size  
of any target you locate:  
• Dig only "B-size" targets to avoid cans  
and similar trash while locating coins and  
most rings.  
• Set GTA discrimination so that you hunt  
only for specific targets.  
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• Use the Target ID Guide to learn what  
you've found.  
• Pinpoint electronically to determine loca-  
tion of target and learn size and depth.  
• Find deeper treasures with computerized  
circuitry.  
Your GTI 1500, whose microprocessor-  
controlled circuitry has been acclaimed  
and proven through countless hours of  
field use, is unparalleled in the simplicity  
of its operation. Just touch the POWER  
touch pad and begin hunting immediately.  
The GTI 1500 offers dedicated coin hunt-  
ers the automatic tuning adjustment pre-  
cision available only with computerized  
controls.  
When you find a target, Garrett's revolu-  
tionary GTA display instantly directs you to  
that target's range on the Target ID Guide.  
Press the TREASURE IMAGING pad to dis-  
cover its exact size and depth, which will  
give you additional clues to its identity.  
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Welcome again to the Garrett fraternity  
of successful treasure hunting hobbyists.  
Now, find your own coins and other  
treasures with the GTI 1500, one of the  
world’s most capable and universal metal  
detectors, yet one that is amazingly easy  
to operate.  
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ASSEMBLY  
Your GTI 1500 is shipped complete in one  
carton:  
A
B
C
F
E
D
A. Control Housing  
B. Upper and Lower Stems  
C. Imaging Searchcoil  
D. Parts Envelope  
E. Training DVD & Owner’s Manual  
F. Warranty Registration Card  
Make certain all of these parts are included  
and are undamaged. Report any shortages  
or damages immediately to your dealer.  
Follow these assembly instructions. No  
tools are required. Hand pressure will be  
satisfactory for all tightening.  
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Inspect contents of the clear plastic enve-  
lope (see above).  
• One (1) knob  
Two (2) Washers  
• One (1) threaded bolt  
1. Attach the lower stem to the 9.5” imag-  
ing searchcoil. Make certain that the two  
rubber washers are inserted onto the  
lower stem before slipping the searchcoil  
onto it.  
Place the threaded bolt through the holes  
in the connector and hand-tighten using  
the remaining wing nut. Use no tools. (See  
image A on page 11.)  
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Image A  
Image B  
2. Depress buttons in the Control Housing  
stem and slide on the Upper Stem (see  
Image B above).  
ꢀ. Depress the buttons in the Lower Stem  
and insert it into the Upper Stem. Buttons  
will pop into the holes, and you can  
achieve the desired stem length. The third  
set of holes from the end is most com-  
monly used.  
ꢁ. As shown (see Image C on follow-  
ing page), wrap searchcoil cable securely  
around stem and connect to detector.  
The first cable turn goes over the top  
of the stem. The cable should be snug  
but still slightly loose so that the angle  
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Image C  
Image D  
of the searchcoil can be changed easily,  
if required. To connect the cable to the  
detector, insert the cable connector into  
the connector on the control housing as  
shown and rotate the collar clockwise until  
secure (approximately four (ꢁ) turns).  
(See Image D above.)  
Hand tighten only. Your GTI 2500 is fully  
equipped with eight (8) AA batteries.  
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GTI 1500 TOUCH PADS  
• Power/Hold to Reset  
Turns detector ON and OFF as well as  
returns it to factory settings when held.  
• Menu/Scroll  
Allows the Operator to scroll through the  
following settings to make adjustments or  
turn them ON or OFF. As you continue to  
push the Menu/Scroll button, you will see  
the following options:  
—Modes (5)  
Coins, Jewelry, Relics, Zero, Custom  
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—Custom Functions Menu  
Sensitivity (Depth), Threshold (Audio  
Level), Frequency, Volume, Tone,  
Rechargable battery  
—Search Aids  
Salt Elimination, Belltone, Backlight  
• Accept / Reject  
Permits acceptance or rejection of specific  
target segments shown on the Lower Scale  
to establish discrimination notches.  
• Treasure Imaging (Pinpoint)  
When pressed and held, activates the  
automatic pinpointing function. In this  
mode the cursor indicating the target just  
discovered will blink on the Upper Scale  
as the target's signal strength is shown.  
Depth of target will be shown on the Lower  
Scale and size of the target indicated at  
the bottom of the Display Screen.  
• Operate  
Returns to operate (hunting) mode after  
any change or adjustment of controls.  
• Last Mode  
Returns detector to the mode (Coins,  
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Jewelry, Relics, Zero, Custom) that was  
previously being used.  
- & +  
These touch pads permit precise regula-  
tion of the GTI 1500 . You will note that  
each press of a touch pad causes seg-  
ments on the Upper Scale to move either  
to the right (+) or to the left (-).  
The + and - touch pads enable the follow-  
ing regulation: Permit alternation between  
the five search modes; Permit adjust-  
ment of levels of sensitivity, Threshold,  
Frequency, Volume and Tone; Activate (+)  
or turn off (-) Salt Elimination, Bell tone  
target audio and Backlight; Activate (+) or  
turn off (-) the NiMH battery gauge; Move  
cursor in the Upper Scale when discrimina-  
tion is being set in the Operate mode.  
Experiment with these touch pads your-  
self and experience the precise degree of  
regulation possible with the GTI 1500.  
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GRAPHIC TARGET DISPLAY  
Target ID Guide  
This guide printed above the LCD screen  
shows U.S. coin denominations, gold, sil-  
ver and other typical metallic objects.  
Upper Scale  
Indicates target discovered; Indicates tar-  
get strength in Treasure Imaging mode;  
Indicates levels of Menu control settings.  
Lower Scale  
Discrimination  
segments  
(notches).  
Indicates depth of all targets in inches  
when in Treasure Imaging mode.  
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Operating Status  
The complete operating status of your  
detector is shown on the screen at all  
times. When the TREASURE IMAGING  
(pinpointing) touch pad 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 MODE heading.  
MENU, OPERATE, IMAGE and SEARCH  
AIDS are shown at the top of the screen in  
its center to indicate detector status.  
MENU is shown when the detector is being  
regulated. OPERATE will be illuminated  
whenever you have pressed the OPERATE  
touch pad and are hunting, and IMAGE  
when you press and hold the TREASURE  
IMAGING touch pad. SEARCH AIDS is illu-  
minated to indicate the Search Aids that  
have been activated.  
On the second line are detector functions  
you can regulate as desired: Sensitivity,  
Threshold, Frequency, Volume, Tone and  
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Rechargeable (seen in lower right corner  
of LCD screen). When one of these func-  
tions has been illuminated by use of the  
MENU/SCROLL touch pad, it can be regu-  
lated by pressing the + or - touch pads.  
Treasure Imaging  
Five target sizes are shown on the color-  
coded Imaging diagram at the bottom of  
the screen.  
Size A - Solid small oval (orange): tar-  
gets smaller than coins, including bits of  
iron or foil.  
Size B - Oval extending to B grid lines  
(red): all U.S. coins, most rings and small  
metal trash such as pieces of pull tabs.  
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Size C - Oval extending to C grid lines  
(purple): targets larger than coins and  
smaller than 12-oz. cans, such as large  
rings, small belt buckles, jewelry and such  
trash targets as screw tops, bottle caps  
and complete pull tabs.  
Size D - Oval extending to D grid lines  
(blue): larger belt buckles, large jew-  
elry items, 12-oz. cans and other items of  
similar size.  
Size E - Oval extending to E grid lines  
(green): objects larger than a 12-oz. can,  
such as kettles, strongbox or big metallic  
trash.  
Experience with Treasure Imaging will  
enable a hobbyist to identify to an amaz-  
ingly precise degree any target before it  
is recovered. The Target ID Guide print-  
ed above the LCD screen showing coin  
denominations, gold, silver and other typi-  
cal metallic objects is designed to relate  
location of the Target Cursor with the size  
indication to help identify discoveries.  
Note - The five letters (A,B,C,D,E) on each  
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side of the diagram and the horizontal  
color-coded lines connecting them. These  
refer to the five relative sizes at the bot-  
tom of the Display Screen.  
Relating conductivity and size to help  
determine your target before digging it  
is a unique feature of the GTI. The target  
cursor on the Upper Scale, which indicates  
the target's conductivity, will blink as you  
pinpoint a target and learn its size, as  
indicated at the bottom of the Display  
Screen. The blinking cursor will indicate  
the last target discovered before the  
TREASURE IMAGING (Pinpoint) touch pad  
was pressed.  
Thus a "B-size" target with a coin's con-  
ductivity as indicated on the Target ID  
Guide will most likely be a coin.  
Because continued practice in relating  
size and conductivity will help you identify  
targets before you dig them, you will dig  
more treasure and less trash.  
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HUNTING BASICS  
This OneTouch detector is today's most  
advanced; yet, its basic automatic opera-  
tion makes it as simple to operate as  
any detector ever manufactured. You can  
begin hunting with it immediately. No spe-  
cial instructions are needed beyond what's  
included in the next few pages.  
More importantly, you can start finding  
coins right now! Here's how to begin:  
1. There are no dials to turn and no con-  
trols to adjust. Just grasp the handle of  
your GTI 1500, and hold the searchcoil  
at least three feet away from any large  
metallic object.  
2. Touch and release the POWER touch  
pad and the GTI 1500 will begin detecting.  
The GTI screen appears as shown on the  
following page. You can see that you are  
operating in the Coins detection mode with  
Bell tone audio turned on, both preset at  
the factory.  
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ꢀ. Your GTI 1500 begins operating with all  
settings at factory-set levels. Any of the  
settings can be easily changed, but you  
many never want to do so! It is recom-  
mended that you use the factory settings  
the first few 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 atop the fac-  
ing page. Keep the searchcoil moving at a  
rate of about one to three feet per second.  
Maintain your coil at a height of one to  
two inches. The coil should be kept level  
at all times.  
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Discovery  
Detection of all metal targets will be  
indicated by the appearance of a Target  
Cursor on the Upper Scale. A cursor will  
appear, as shown below, to indicate every  
detected target and will remain for ꢁ  
seconds or until a new target is detected  
(whichever comes first). Desirable targets  
will also produce a "beep". In the illustra-  
tion below the Target Cursor is located at  
9+, which would probably indicate a quar-  
ter if Treasure Imaging shows it to be a B-  
size target. Locate your target by scanning  
back and forth over it to determine where  
signals are strongest.  
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Treasure Imaging (Pinpoint)  
Press and hold this touch pad to put  
your detector into a Treasure Imaging  
(Pinpoint) mode so that you can locate  
your target more precisely and also deter-  
mine its relative size and depth. Size will  
be shown at the bottom of the Display  
Screen, as shown above. Since you have  
a B-size target and your Target Cursor is  
blinking at 9+, you have probably found  
a quarter.  
Pinpointing and sizing through TREASURE  
IMAGING can be an invaluable aid to trea-  
sure hunting when used properly.  
To turn OFF your detector: Simply press  
and release the POWER touch pad. Charles  
Garrett recommends that you first become  
familiar with your new detector by hunting  
for at least 10 hours in the factory preset  
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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 capabili-  
ties and the target analysis of this detector  
which utilizes patented DSP (Digital Signal  
Processing) methods to give it advanced  
detection capabilities that can be matched  
by those of only one other detector, the  
GTI 2500. You may have encountered an  
occasional instance when your GTI 1500  
seemed to present inconsistent informa-  
tion. This probably occurred when the  
detector was attempting to analyze two  
or more targets beneath its searchcoil or  
when you have not properly centered the  
coil over your target.  
This problem of analysis occurs with all  
detectors, but the GTI 1500 discovers  
vastly more targets than old-style instru-  
ments with their limited circuitry. In addi-  
tion, the deep seeking power of the detec-  
tor may sometimes cause it to detect but  
fail to identify clearly a target some dis-  
tance away, one over which your search-  
coil has not even scanned.  
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Correct operating techniques will enable  
you to properly use all of the data pre-  
sented by your detector to become aware  
of the precise nature of all targets.  
You will quickly master these techniques  
and learn why the GTI 1500 with DSP,  
Treasure Imaging and controls based on  
patented microprocessor technology has  
more accurate discrimination and better  
sensitivity and effectiveness than other  
detectors.  
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OPERATING ADJUSTMENTS  
Status of each of the control selections  
will be shown on the LCD Graphic Display  
above the control panel touch pads. When  
you touch the POWER touch pad, your GTI  
1500 is ready to hunt in a Coins operating  
mode with threshold, sensitivity (depth),  
tone and other controls preset at the fac-  
tory, as shown above. As explained in  
the following pages, settings can be easily  
changed through regulation of the + and  
- touch pads.  
The GTI 1500 functions like other detec-  
tors and its coil must be moving slightly  
for detection to occur. Microprocessor-  
controlled DSP circuitry of the GTI 1500,  
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unlike that of ordinary detectors, however,  
adapts automatically to the coil's rate of  
movement. Your searches will have the  
same high degree of accuracy whether  
you are scanning rapidly to cover a large  
area quickly or moving methodically and  
very slowly over a location with multiple  
targets. Automatic circuitry is designed  
to provide precise ground balance at any  
speed.  
Five different modes of detection are  
available, each with specific discrimination  
notches which are 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 touch pad to begin hunting or  
the MENU touch pad to move to another  
control selection.  
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CONTROL SETTINGS  
Sensitivity (Depth)  
Press the MENU touch pad to display  
SENSITIVITY on the screen (shown with  
factory setting at approximately 75% as  
indicated on the Upper Scale), and you can  
use the + and - touch pads to adjust the  
sensitivity at which your detector will oper-  
ate most effectively. These changes will be  
shown on the Upper Scale. Although the  
instrument’s maximum sensitivity (depth)  
is usually desired, this is often not feasible  
because of the type of soil over which you  
are scanning or because of electromag-  
netic or power line interference. Ground  
mineralization and other considerations  
can limit the detector's ability to interpret  
target information. This control option  
permits you to achieve a stability that per-  
mits maximum detection depth possible  
in relation to any specific environmental  
conditions.  
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Press + to increase sensitivity. Press -  
to decrease. A single touch and release  
adjusts the level in a small increment.  
Continuous pressing results in a continu-  
ous adjustment.  
Threshold  
Press the MENU touch pad to display  
THRESH on the screen (above, with fac-  
tory setting indicated on Upper Scale),  
and you can use the + and - touch pads to  
adjust the threshold of sound that is being  
produced by the GTI 1500 as it scans.  
Multiple touches will increase or decrease  
the sound level. Changes can be seen on  
the Upper Scale.  
You can search silently or at any level of  
constant sound. Charles Garrett and veter-  
an hobbyists usually prefer to operate the  
instrument at a minimum level of audible  
sound but this is no longer necessary.  
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The audio will increase sharply when-  
ever 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.  
Frequency  
This detector is capable of operating at  
four different detection frequencies or  
channels, which you will find valuable if  
you participate in competition hunting or  
if you enjoy hunting with others. In fact,  
operating your GTI 1500 at a different  
frequency might be necessary any time  
two or more detectors are being used so  
close together that their signals interfere  
with one another. Outside electrical or  
atmospheric interference can also cause  
an interference that results in strange  
sounds.  
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Whenever you hear unusual sounds and  
believe that you are encountering interfer-  
ence, press and release the MENU touch  
pad until FREQ appears on the screen (as  
shown on the previous page). The Upper  
Scale will indicate the frequency at which  
your detector is now operating. Use the +  
and - touch pads to change this frequency  
until you find one with little or no interfer-  
ence.  
Volume  
After pressing the MENU touch pad to  
display VOLUME on the screen, the fac-  
tory setting for the loudness of the target  
sound will be indicated on the Upper Scale  
(as shown above). Use the + and - touch  
pads to adjust audio to the volume that  
you prefer. Touching the + pad will make  
the sound louder, while touching the - will  
lower the volume. Since this adjustment  
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controls the maximum volume of sound  
produced by the GTI 1500 only when a  
target is encountered, it will not affect the  
threshold level you have already selected  
as the primary audio function of your  
detector.  
When headphones are used, it will usually  
be necessary to decrease volume since  
detections sounds are louder over head-  
phones. Experiment to determine which  
volume best suits your hearing.  
Tone  
After using the MENU touch pad to display  
TONE on the screen, the factory tone set-  
ting will be indicated on the Upper Scale,  
as shown. Use the + and - touch pads to  
adjust the audio to preferred pitch or tone.  
Touching the + pad will raise the tone into  
a higher treble range, while touching - will  
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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.  
Battery Gauge  
The scale (lower right of screen) indicates  
the condition of standard (carbon or alka-  
line) or rechargeable batteries. To turn on  
the rechargeable option, press the MENU  
touch pad until RECHARGE is displayed.  
Press the (+) or (-) touch pad to activate.  
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SEARCH AIDS  
Salt Elimination  
When hunting on an ocean beach, or over  
any ground with high salt content, you  
may want to use this Search Aid to elimi-  
nate interference caused by wetted salt.  
If you wish to turn on the Salt Elimination  
aid, use the MENU to display Salt Elim and  
press + when the word is blinking to turn  
it on. Press - to turn OFF the function and  
cause the word to blink.  
Bell tone  
Garrett's Coin Alert Bell tone, which is the  
factory audio setting for the GTI, will signal  
the operator with a special ringing sound  
whenever a target has been located—such  
as a coin—of high conductivity shown on  
the highest (first nine from right) seg-  
ments on the Upper Scale. Other accepted  
targets will cause a normal "beep," with a  
lower tone produced by targets in the iron  
range (four lowest segments on the left of  
the scale).  
If you wish to use the Belltone audio  
enhancement for target sounds, no action  
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is necessary at factory settings. To turn  
off this function use MENU to display the  
word, press - and the word will begin  
blinking. Pressing + will turn it back on.  
Backlight  
This function of the GTI 1500 lights the  
control panel so that the detector can  
be used at night or in dark places. The  
Backlight will turn on automatically when-  
ever the unit is in the MENU mode and will  
turn itself off when you leave this mode  
unless you have activated the function, as  
described below.  
If you wish to turn on the Backlight aid,  
use the MENU to display Backlight and  
press + when the word is blinking to turn  
it on. Press - to turn off the function and  
cause the word to blink.  
To maximize battery life it is recommended  
that you make certain that the Backlight  
is turned off whenever it is not needed.  
Additional Settings Information  
All of the personal preference adjust-  
ments you have just set in the GTI 1500  
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with the various operating functions will  
be retained by the detector when you  
press POWER to turn the detector OFF.  
These personal alterations are held in a  
non-volatile memory circuit and retained  
even when the batteries are removed. The  
detector must be turned off when batteries  
are being replaced.  
Any changes you make in discrimination  
settings in the various modes, 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 occasionally.  
If you are ever unsure about the settings  
of the GTI 1500, you can instantly restore  
the precise factory-set levels of all settings  
and controls. Just press and hold down the  
POWER touch pad for five seconds or until  
a "double-beep" lets you know that factory  
settings have been restored.  
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OPERATING MODES  
Press MENU and use the + touch pad 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 touch pad to  
begin hunting or the MENU touch pad to  
move to another control selection.  
Coins  
Discrimination preset in the detector for  
this mode that is shown above is designed  
to eliminate detection of lower conduc-  
tivity trash targets, such as bottle caps,  
most pull tabs and other objects normally  
encountered in coin hunting. Some bent  
pull tabs and pieces of tabs may not  
be eliminated from detection. Successful  
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treasure hunters, however, all understand  
that they must dig some junk occasionally.  
Correct operation of the GTI 1500 should  
reduce this wasted effort.  
Jewelry  
This detection mode, 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.  
Relics  
This detection mode (shown above) is  
specifically designed for relic hunting, with  
discrimination in the detector's circuitry  
set to eliminate trash targets normally  
associated with relic hunting, while includ-  
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ing good targets in the lower conductivity  
range, items generally sought by most  
relic hunters.  
Zero Discrimination  
This mode, shown above, permits you  
to hunt with no discrimination and offers  
a method of "dual-mode" hunting. Your  
detector will give a "beep" to announce  
any metal it scans over while a cursor  
indicates it. You can then press Last Mode  
to return to another of the Discriminate  
modes to "quick-check" a target.  
Custom  
This mode was designed to be set by  
the operator. When the detector leaves  
the factory, Custom has been set to the  
Coins mode. Through use of the ACCEPT/  
REJECT touch pad, a hobbyist can modify  
this mode's discrimination to individual  
specifications. And modifications will be  
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retained by the detector's memory when  
it is switched OFF.  
Many GTI 1500 owners may rarely use  
the Custom mode, and will hunt only in  
the preset Coins, Jewelry, Relics or Zero  
Discrimination modes. Complete instruc-  
tions for setting discrimination notches for  
any of these modes can be found on the  
following four pages of this manual.  
Note: When the detector is turned OFF  
and then turned back ON again, it will  
begin operations in the mode in which it  
was previously operating. Whenever the  
POWER touch pad is pressed and held,  
however, factory settings will be restored  
and the detector will begin operating in the  
Coins Mode.  
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SETTING DISCRIMINATION (Notches)  
Using only the discrimination of its factory-  
set Coins, Jewelry, Relics and Zero operat-  
ing modes, the GTI 1500 will more than  
satisfy the requirements of almost every  
treasure hunter. Many will never require  
any other discrimination. Still, this detec-  
tor offers more, Custom discrimination, to  
tailor a detection mode to any requirement  
by setting precise detection "notches."  
The Lower Scale contains Discrimination  
Segments. Those that are turned on  
(darkened) represent targets whose con-  
ductivity will cause a "beep" when they  
are detected in any operating mode. In  
the Zero mode all segments are turned  
ON, which indicates that almost every  
metal target will cause the "beep" of a  
detected target. Through use of the +, -  
and ACCEPT/REJECT touch pads, specific  
"notches" can be created by turning dis-  
crimination segments ON and OFF in any  
of the five operating modes.  
There are two methods of setting discrimi-  
nation in any mode.  
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First Method: While in the OPERATE mode  
press the + and - touch pads 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 target will be signaled audibly. If you  
wish to reject that type target, press the  
ACCEPT/REJECT touch pad. The segment  
will be turned off and disappear, creating a  
"reject notch." If the Lower Scale segment  
is not showing, press the ACCEPT/REJECT  
touch pad to turn it on, creating an "accept  
notch," and your GTI will sound off on  
targets represented by that segment. The  
OPERATE pad must also be pressed after  
notches have been set.  
Second Method: Pass the searchcoil over  
an object to be accepted or rejected as a  
target or pass the particular target across  
the face (bottom) of the coil about two  
inches away. Check to make certain of  
the location of the target cursor on the  
Upper Scale. If the segment below is not  
showing, press ACCEPT/REJECT to turn it  
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on. If it is showing, pressing this pad will  
turn it OFF.  
Remember: When you press the ACCEPT/  
REJECT touch pad, you cause the dis-  
crimination circuit to reject a target that is  
shown on corresponding segments of both  
the Lower and Upper Scales. This rejection  
will be indicated by the disappearance of a  
Lower Scale segment.  
The same touch pad is used to cause  
the detector to accept a target. When  
such a desired target is being shown by  
the cursor but not the corresponding  
Discrimination Segment below, press the  
ACCEPT/REJECT touch pad. The segment  
will be turned ON and appear, indicating  
that your desired target will now cause a  
"beep."  
Note: It is important to remember that  
each time the detector is turned OFF  
ACCEPT/REJECT selections will be retained  
only in the Custom mode. Any ACCEPT  
/ REJECT modifications you have made  
in the preset Coins, Jewelry, Relics and  
Zero modes will be lost, since these four  
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modes return to factory-set detection  
settings each time the detector is turned  
OFF and turned back ON. Custom mode  
discrimination changes will be lost only  
when POWER is held for five (5) seconds  
for return of 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. You can  
use the matching earring to set notches  
on your GTI to accept only that type of  
metal target. You may be hunting in an  
area where you are plagued with a specific  
type of trash. You can reject just this type  
of trash metal and continue to hunt with  
no other discrimination, detecting all other  
metal. You may have your own special  
ideas for designing a mode of detection.  
The Garrett GTI 1500 gives you virtually  
unlimited opportunities to test any and all  
your ideas and to try them out easily and  
quickly. Only Garrett's GTI and GTA detec-  
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tors permit such accurate levels of precise  
discrimination. Return to factory settings  
by pressing and holding the POWER touch  
pad for 5 seconds.  
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TREASURE IMAGING  
Sizing and pinpointing targets precisely  
are important capabilities of your GTI  
1500. Furthermore, when you press and  
hold the TREASURE IMAGING pad, the  
searchcoil can remain stationary over your  
target. Move the coil around slightly to  
try to center it directly over the target.  
Targets must pass beneath the searchcoil,  
not above it.  
The searchcoil must be centered directly  
over the target to produce correct size  
and depth information. This is especially  
important when searching such areas  
as slanted walls or the ceiling of a cave.  
Targets that are not properly centered may  
be indicated as deeper and larger than you  
will find them to be after digging.  
Here's a tip. For most effective normal  
automatic pinpointing: first, place the  
searchcoil on the ground near your target,  
but not over it. Then, press and hold the  
TREASURE IMAGING touch pad. Scan back  
and forth across the target, maintaining  
searchcoil contact with the ground. You  
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will notice a more distinct audio sound  
when the target is directly beneath the  
searchcoil's center. In addition, you will  
note that signal strength on the Upper  
Scale will increase. The Upper Scale cursor  
indicating the target just discovered will  
blink, even as signal strength is shown.  
Depth Reading on Scales  
When you press and hold the TREASURE  
IMAGING touch pad, depth will be indi-  
cated on the Lower Scale. Correct depth is  
given for all targets, not just for coin-size  
objects. Illumination of Upper Scale seg-  
ments, from left to right, indicates target  
signal strength. The maximum reading  
attained will indicate exact target loca-  
tion. While still pressing the TREASURE  
IMAGING touch pad, check the Lower  
Scale to determine target depth in one-  
inch increments.  
Size Imaging  
When  
you  
press  
and  
hold  
the  
TREASURE IMAGING touch pad, you can  
observe your target’s size as shown on the  
Display Screen.  
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Four typical examples:  
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Radiating Size Array  
While the TREASURE IMAGING touch pad  
is being pressed and held, you may occa-  
sionally observe a size reading that con-  
tinues to change dramatically, with the  
size appearing to "radiate" rapidly and  
continually outward from the small oval  
at the center. Garrett engineers call this  
a "Radiating Array" effect, which indicates  
that the target is too deep and/or too  
small to determine an exact size.  
It is likely, however, that the target is  
either Size A at 6"; a Size B at 8"; Size C  
at 10"; or Size D at 12". No depth reading  
will be displayed while the Radiating Array  
is occurring. The Array may also appear  
when the target is significantly off-center  
from the coil. Always remember that your  
searchcoil must be centered directly over  
the target to produce correct size and  
depth information.  
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BENCH TESTING  
This will enable you to test typical targets  
and to learn about the discriminating  
capabilities of the GTI before taking it into  
the field or trying to set discrimination.  
The following tests should be performed,  
as shown above with the searchcoil per-  
pendicular to a bench, floor or other non-  
metallic surface and several feet away  
from any metallic object:  
1. Select the Zero mode of operation.  
Bring various metallic targets across the  
center of the bottom of the searchcoil at a  
distance of about two inches. Each target  
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will cause a "beep." Pay particular atten-  
tion to the size of each target as indicated  
when you press and hold the TREASURE  
IMAGING touch pad.  
2. Use the MENU/SCROLL and (+) or (--)  
touch pads to select the Coins detection  
mode. Then press OPERATE. Bring the  
same targets across the bottom of the  
searchcoil and listen for a "beep" when the  
various items are scanned. Notice where  
the Target Cursor darkens in the Upper  
Scale of the Graphic Display when particu-  
lar targets are scanned across the coil.  
ꢀ. Perform the same tests with the other  
modes and observe the sounds, Upper  
Scale indications and sizes when the  
TREASURE IMAGING touch pad is pressed  
and held.  
ꢁ. Begin to experiment with the ACCEPT  
and REJECT touch pads. Notice carefully  
which of the segments are illuminated as  
you identify various targets.  
5. Be methodical. Keep written records of  
results and use them when hunting.  
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OPERATING RECOMMENDATIONS  
As you walk, scan the searchcoil from side  
to side in a straight line or slight arc. Keep  
the coil level and at a constant height of  
one or two inches above the ground while  
you move it at a rate of about one to three  
feet per second.  
When scanning, do not hurry. Be methodi-  
cal. Do not skip any areas. Overlap each  
scan sweep at least 25% of the search-  
coil's width. Wear headphones to avoid  
ambient noises and concentrate on scan-  
ning. When you are searching in the Zero  
mode, detection of any metal target will be  
indicated by a "beep."  
Target Identification  
Conductivity classification of every target  
over which the searchcoil passes will be  
indicated by a target cursor on the Upper  
Scale. The searchcoil must be centered  
over your target to produce accurate size  
and depth information.  
Highly mineralized soil can occasionally  
result in improper conductivity readings.  
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Raising the coil an inch or two as you  
scan over such soil is sometimes helpful.  
Remember to keep the coil level and at  
a constant height. Encrustation or patina  
may also affect conductivity of the target,  
resulting in improper classification.  
Recovery (Treasure Imaging)  
Locating your target precisely will enable  
you to recover it by digging the smallest  
hole possible. This is accomplished first  
by pinpointing which also enables you to  
utilize another function of the GTI 1500 for  
measuring size and depth.  
Begin to locate targets by first drawing  
an imaginary "X" on the ground with the  
searchcoil at the place where maximum  
sound occurs. You can then utilize the real  
"magic" of the Treasure Imaging mode and  
learn size and depth.  
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. You should  
always fill your holes.  
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Last Mode  
Use of this touch pad can be particularly  
helpful while scanning because it effec-  
tively converts your GTI 1500 into an  
instantaneous dual, or triple-mode detec-  
tor. Pressing and releasing this touch  
pad returns detector operations to the  
mode that has just previously been used.  
Thus, it is easy to alternate between any  
two operating modes, such as Coins and  
Zero or Custom. Pressing the TREASURE  
IMAGING touch pad, then, provides a  
third, all-metal mode.  
More On Target Audio  
It is important to remember that the GTI's  
audio causes weaker targets to be detect-  
ed with shorter "beeps" and stronger tar-  
gets to be detected with longer “beeps.”  
When a metallic object is accepted, the  
detector will, of course, “beep. Some  
rejected targets, however, may cause  
audio to “break Up” or sound erratic. This  
is generally a response to shallow, trash  
targets and can be remedied by rais-  
ing the height of your searchcoil slightly  
when scanning (always keeping it level).  
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Another indication of a reject target is an  
audio signal as you scan one way, and no  
response when scanning from the other  
direction.  
If you encounter a large target or scan too  
close to it, the detector will give an audible  
overload indication, which sounds like a  
buzzing alarm. Target identification, size  
and depth readings may be incorrect if an  
overload occurs.  
Setting Sensitivity  
Garrett engineers designed your GTI 1500  
to achieve maximum detection depth, but  
you may not always be able to search  
at 100% sensitivity (depth)...just as you  
rarely can (or, even want to) operate your  
automobile at 100% of its speed capacity.  
Outside electromagnetic interference and  
irregular ground mineralization may some-  
times require that you search at reduced  
sensitivity.  
Don't worry about losing "deep targets!"  
You won't ever be losing anything because  
you'll always be able to search as deeply  
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as ground and atmospheric conditions  
permit. Attempting to operate at sensitivi-  
ties above a level that permits a quiet and  
stable operation may actually cause you  
to miss deep targets that you would have  
found had you not "pushed" the detector.  
Another point to remember is that when  
you are searching with SENSITIVITY set  
below the maximum under "less-than-  
perfect" conditions, you will always have  
additional detection power when you are  
able to use it.  
Test Plot Construction  
As you search and use your GTI 1500,  
you will quickly grow more proficient in its  
use. Building and using your own test plot  
will sharply increase this proficiency. Bury  
several items at varying depths of 1"-6"  
about 18" apart. Include several coins, a  
ring, a nail, a piece of foil, a pull tab and a  
bottle cap. Bury large items such as a 12-  
oz. can or a length of pipe deeper (10").  
Clearly mark where each article is buried  
and its depth. Scan over them while care-  
fully studying the detection signals.  
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Remember that newly buried objects,  
especially coins, will be somewhat more  
difficult to detect than items buried for  
some time. This is primarily a metallurgi-  
cal phenomenon. Experiment with various  
detection modes, and pay close attention  
to both audio and TREASURE IMAGING  
signals as you scan. Note your detector's  
response at the various settings. Practice  
pinpointing and imaging to locate targets  
precisely.  
With Experience  
After you have hunted with the GTI 1500  
for only a short time, you will be surprised  
at how proficient you have become with  
it. Do not expect to achieve the great-  
est accuracy and success, however, until  
you have used this detector for at least  
100 hours or more. Don't forget to take  
Charles Garrett’s advice to press only one  
touch pad and search in the factory preset  
Coins detection mode for at least 10 hours  
during your “learning” phase.  
Remember, the more you use your detec-  
tor in the correct manner, the more trea-  
sure you will discover.  
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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 interfer-  
ence from outside noise. Headphones are  
particularly essential when hunting where  
noise (running water, people, surf, traffic,  
etc.) is excessive. Use of headphones will  
also extend battery life.  
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SEARCHCOILS  
Your GTI 1500 is equipped with a 9.5"  
PROformance imaging coil.  
You may also wish to purchase a 12.5"  
imaging coil. Also available for the GTI  
1500 are a ꢁ.5" Sniper coil, a 10" x 1ꢁ" DD  
coil and a 5x10" DD coil.  
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 reach or  
can't fit. All Garrett searchcoils are fully  
submersible.  
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BATTERIES  
The GTI 1500 is equipped with two bat-  
tery packs, each holding four (ꢁ) standard  
AA batteries. (It is recommended that top  
quality heavy duty or alkaline batteries  
be used. The detector is also designed to  
utilize nickel metal hydride (NiMH)  
rechargeable batteries.) It is advisable to  
remove the battery packs when the detec-  
tor is not in use, particularly for a period  
of a month or more.  
Although standard battery packs and  
optional rechargeable packs can be used  
interchangeably in the detector, it is recom-  
mended that both packs being used at the  
same time always be the same type. The  
GTI 1500 should search at least 18 hours  
with carbon batteries and longer with alka-  
line cells. Rechargeables should power the  
detector approximately 20 hours on a full  
charge. These estimates are for speaker  
operation with the Backlight turned off.  
Operating with headphones will further  
extend battery life.  
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Checking Condition  
Battery condition is reported continuously  
by the horizontal row of squares on the  
lower right side of the screen. Five are vis-  
ible when fully charged batteries are being  
used. When only one square remains,  
batteries should be changed. You should  
always carry spares so that you will be  
ready.  
Rechargeable Batteries  
When rechargeable batteries are being  
used, the RECHARGE battery option must  
be turned on for the battery level indi-  
cator to be accurate. Continue pressing  
the menu button to scroll to the battery  
RECHARGE icon. Press (+) to set the  
detector for rechargeable batteries. Press  
(-) to set the detector for carbon or alka-  
line batteries.  
Replacement  
1. Turn OFF the GTI 1500 by pressing the  
POWER touch pad.  
2. It is not necessary to remove the bat-  
tery case. Just slide it back slightly from  
its normal position beneath the armrest.  
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ꢀ. Slip up the two covers on the battery  
panel and remove them completely.  
ꢁ. Take out the two battery holders (which  
are not connected by wire) by tilting the  
pack. (See image above.)  
5. Remove 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  
in image on next page). It is important  
that the "eyelets" be toward the center so  
that battery packs will be replaced in their  
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proper orientation. This is important! If an  
effort is made to install holders incorrectly,  
replacing the battery case covers will be  
difficult. If they are forced, damage to the  
detector can result.  
8. Press down firmly and slide each cover  
back in place. Remember: The detector  
must be turned off when batteries are  
being changed.  
Caution: Use only high quality NiMH, car-  
bon, alkaline or heavy duty batteries.  
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RECOMMENDED ACCESSORIES  
Your Garrett GTI 1500 represents the  
highest quality in metal detector manufac-  
turing. Complement it with quality acces-  
sories 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.  
• Additional searchcoils.  
• Rechargeable Battery Pack and Recharger  
that cuts down on the cost of batteries.  
• Coin Hunter Kit (pouch, probe, digger)  
that is all you need for recovering coins in  
the outdoors.  
• Coil cover to protect your 9.5” searchcoil  
and lengthen its lifespan.  
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MAINTENANCE  
• Always remember that your GTI 1500  
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-freez-  
ing weather.  
• Keep your detector clean. Always wipe  
the housing and LCD after use, and wash  
the coil when necessary.  
• Your searchcoil is submersible. The con-  
trol housing is not! Never submerge the  
control housing, and always protect it from  
heavy mist, rain or blowing surf.  
• Disassemble the stem and wipe it clean  
after use in sandy areas.  
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• When storing for a month or longer,  
remove batteries from the detector and  
from their holders as well.  
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SPECIALIZED HUNTING  
Coins  
Because of its unique discrimination and  
imaging capabilities, the GTI 1500 func-  
tions as an outstanding coin hunting  
detector, especially in its Coins mode.  
Deep seeking capability, target conduc-  
tivity and Treasure Imaging information  
available from Digital Signal Processor  
(DSP) circuitry, plus the GTI 1500's ease  
of handling make this a superb instrument  
for finding coins.  
In addition, target sizing presents a sec-  
ond dimension in discrimination. When  
you discover a target whose conductivity  
as shown on the Upper Scale indicates that  
it might be a coin, check its size. If it's not  
a B-size target, it's not likely to be a U. S.  
coin! Small gold coins and antique coins  
may read A-size.  
Whether you choose to hunt for them in  
a park or on a beach, Garrett's factory-  
set Coins mode offers discrimination that  
responds ideally to conditions normally  
encountered. You may occasionally dis-  
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cover quantities of specific trash targets  
that are not being eliminated from detec-  
tion by factory-set discrimination. You can  
then use the ACCEPT/REJECT touch pad  
to eliminate these pesky pieces of junk,  
no matter which mode you are using. Just  
move your searchcoil across one of them,  
watch your Upper Scale for its response  
and push the ACCEPT/REJECT touch pad.  
The Lower Scale notch vanishes, and you'll  
have no more trouble from that type of  
trash metal. With the GTI 1500 you spend  
less time digging trash and more time dig-  
ging coins!  
Custom discrimination enables you to  
design your own coin-hunting mode. Any  
Custom discrimination selections you make  
will be retained in the detector's memory,  
even after the instrument has been turned  
OFF and the batteries removed.  
For literature explaining more about coin  
hunting see the Recommended section in  
this manual. An order blank is included  
or you can call 1.800.527.ꢁ011 to place a  
credit card order.  
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Relics  
Relics of all shapes and sizes can be  
found with a GTI 1500 when you hunt in  
its Relics mode. This mode is especially  
designed to eliminate those nuisance tar-  
gets most often encountered in relic hunt-  
ing. You may also want to search in the  
Zero Discrimination mode, but you must  
be prepared to dig metallic trash since  
your detector will sound off on any metal it  
locates when hunting in that mode.  
Whenever you search in an area where  
relics are known to exist, you can be cer-  
tain to find them with a GTI 1500.  
Gold Nuggets  
Gold and other precious metals can be  
found in various forms with a GTI 1500.  
You will most likely be searching for gold  
nuggets, which this detector can locate in  
streams or dry sand. Since the GTI 1500  
is a motion detector, it is capable of finding  
only somewhat larger nuggets (the size of  
a BB-pellet and larger).  
To locate even smaller nuggets (pinhead-  
size and slightly larger) Garrett's Scorpion  
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Gold Stinger is recommended.  
It must be emphasized, however, that  
prospectors, when using the GTI 1500 or  
any other quality detector usually prefer to  
operate in the Zero Discrimination detec-  
tion mode. When prospecting, discrimi-  
nation may reduce the amount of small  
nuggets found, but some areas contain so  
much iron trash that a small amount of  
discrimination becomes highly desirable,  
even necessary. You may want to estab-  
lish a special "notch" to avoid a particular  
junk metal target that is proving especially  
bothersome.  
Hard work, patience and research are  
three of the keys to success in hunting  
for gold with a metal detector. Research  
is important because it is vital that gold  
always be sought in areas where it is  
known to exist.  
For literature that will explain more about  
gold hunting see the Recommended  
Reading section in this Owner's Manual.  
Graphic Target Imaging 1500 - 71  
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REPAIR SERVICE  
In case of difficulty, read this Owner's  
Manual again thoroughly to make certain  
your Garrett GTI 1500 is not inoperable  
because of wrong adjustments or improp-  
er operating methods. Your dealer may  
also be able to offer advice. Remember  
that computerized circuitry of this detec-  
tor permits you to restore instantly all of  
its precise factory settings. Simply hold  
down the POWER touch pad for five (5)  
seconds.  
When your detector must be returned to  
the factory for service, always include a  
letter with the instrument that describes  
its problem as fully as possible. Include  
your name, address and a phone number  
where you can be contacted between 8:ꢀ0  
a.m. and ꢁ p.m., Central time.  
Before you return your detector to the  
Garrett factory, make certain:  
• You have carefully inspected batteries  
and their alignment.  
(Check batteries  
especially closely. They are the most com-  
mon cause of detector “failure.")  
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• You have checked with your dealer.  
• You have tried to restore factory set-  
tings.  
• You have carefully packed the detec-  
tor 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. Return any coil that  
you believe may be causing a problem.  
• Ship to Garrett Metal Detectors, 1881  
West State Street, Garland, TX 750ꢁ2.  
Foreign shipments must be authorized by  
a local agent or representative.  
• You can call Garrett's Customer Service  
Department (972) ꢁ9ꢁ-6151, if you have  
further questions.  
Please allow approximately one week for  
Garrett technicians to examine and ser-  
vice your detector after receiving it, plus  
another week for return shipping. All  
equipment will be returned UPS or parcel  
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post unless you give written authorization  
to ship collect by air parcel post, UPS Blue  
(air) or air freight.  
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RECOMMENDED READING  
Since your Garrett GTI 1500 is a truly  
universal detector, all of the RAM books  
will be pertinent to its use. Of particular  
interest, however, will be the revised ver-  
sion 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 comput-  
erized detectors.  
For beginners, however, the new edition  
of Treasure Hunting for Fun and Profit will  
prove especially interesting and helpful.  
Where can you hunt? How about ghost  
towns and deserted structures? You will  
read about them in Charles Garrett's  
Ghost Town Treasures.  
Bob Marx's Buried Treasures You Can Find  
locates thousands of sites where trea-  
sure is know to have existed. This fine  
book also includes much good information  
Graphic Target Imaging 1500 - 75  
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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.  
Charles Garrett's pocket-sized, treasure-  
hunting field guides are also highly recom-  
mended. Titles in this informative series  
include: How To Find Lost Treasure; How  
To Find Gold: Metal Detecting and Panning;  
and How To Search Sand and Surf.  
Since the GTI 1500 is such an excellent  
detector for hunting for gold nuggets and  
ore veins, you will be interested in You Can  
Find Gold with a Metal Detector. All hob-  
byists are urged to familiarize themselves  
with this most interesting and exciting  
aspect of metal detecting.  
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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..................................$9.95  
___ New Modern Metal Detectors..................$12.95  
___ Gold Panning is Easy.................................$9.95  
___ How to Find Lost Treasure*.......................$3.95  
___ How to Find Gold ......................................$3.95  
___ How to Search Sand and Surf ....................$3.95  
* Free with the purchase of any other RAM book or  
Garrett product. If you do not wish to purchase anything but  
would like a free copy of How to Find Lost Treasure, mail  
$2.00 for postage/handling to our address. U.S. orders only.  
For international orders, contact [email protected].  
Please send payment to:  
RAM Publishing Co.  
1881 West State Street  
Garland, Texas 75042  
(Order form continued on back of this page)  
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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  
$______________  
8.25% Tax (TX/CA residents) $______________  
Handling Charge  
$______________  
$______________  
TOTAL  
Payment Options:  
___ Enclosed check or money order  
___ I prefer to order through:  
___ American Express  
___ Visa  
___ MasterCard  
___ Discover  
Card Number: ____________________________  
Expiration Date of Card: ___________________  
Phone Number: __________________________  
Signature: ________________________________  
Required on credit card purchases  
Name: ___________________________________  
Address: _________________________________  
_________________________________  
City/State/Zip: ____________________________  
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SPECIFICATIONS  
Detector Type: Very low Frequency, trans-  
mitter/receiver, Treasure Imaging and  
Graphic Target Analyzer for precise target  
identification, multiple notch discrimina-  
tion.  
Controls: Easy access touch pads  
Display: High visibility LCD adjacent to  
touch pads; data accessible at any angle;  
backlight.  
Detection Frequency: 7.0 kHz, adjustable  
Circuitry: Linear transmitter/receiver/fil-  
ter front end Crystal controlled 1ꢀ.ꢀ MHz  
operation  
High reliability surface-mount printed cir-  
cuit board construction  
Audio Frequency: 275 to 710 Hz  
Batteries: Eight (8) AA  
Graphic Target Imaging 1500 - 79  
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Battery Life: (Approximate)  
Alkaline: 25 hrs.  
Carbon Zinc: 18 hrs.  
NiMH: 20 hrs.  
Humidity: 0 to 95% Non-condensing  
Temperatures:  
Operating: 0 to 1ꢀ0 F.  
˚
˚
˚
˚
Storage: -20 to 150 F.  
Construction:  
High strength glass-filled nylon with han-  
dle-mounted control/display panel.  
Weight: (With 9 1/2-inch searchcoil) ꢁ  
lbs., 2 ozs.  
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MIND YOUR MANNERS  
Filling holes and obeying no trespassing  
signs are but two requirements of a dedi-  
cated 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. Thousands of  
individuals and organizations have adopt-  
ed this formal Metal Detector Operators  
Code of Ethics:  
• 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 when-  
ever possible.  
• I will cause no willful damage to property  
of any kind, including fences, signs and  
buildings and will always fill holes I dig.  
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• 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.  
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TRADEMARKS / PATENTS  
GTI 1500, TreasureVision, Graphic Target  
Analyzer and OneTouch are TM of Garrett  
Electronics, Inc.  
Patent Protection:  
Garrett's high tech instruments are pro-  
tected by one or more of the following  
U.S. Patents and other Patents Pending:  
5,1ꢁ8,151,  
ꢁ,ꢀ98,10ꢁ,  
ꢁ,ꢀꢀꢁ,191,  
ꢁ,ꢀꢀꢁ,192,  
ꢁ,709,21ꢀ  
5,1ꢀ8,262,  
ꢁ,ꢁ2ꢀ,ꢀ77,  
ꢀ,662,225,  
ꢁ,ꢁ88,115,  
5,721,ꢁ89,  
ꢁ,ꢀ0ꢀ,879,  
ꢁ,162,969,  
ꢁ,700,1ꢀ9,  
Design 27ꢁ,70ꢁ and 297,221  
G. B. Design 2,011,852  
Australia Design 111,67ꢁ.  
Other patents pending.  
All Garrett detectors are manufactured in  
the United States of America.  
Graphic Target Imaging 1500 - 8ꢀ  
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WARNING!  
Any metal detector may discover under-  
ground power lines, explosives or other  
items which when struck could cause per-  
sonal injury. When searching for treasure  
with your Garrett GTI 1500, observe these  
precautions:  
• Do not hunt in an area where you believe  
there may be shallowly buried under-  
ground 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.  
• Do not disturb any pipeline, particularly  
if it could be carrying flammable gas or  
liquid.  
• Use reasonable caution in digging toward  
any target, particularly in areas where  
you are uncertain of underground condi-  
tions.  
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Garrett Metal Detectors  
1881 W. State Street  
Garland, Texas 750ꢁ2  
T: (972) ꢁ9ꢁ-6151  
F: (972) ꢁ9ꢁ-1881  
1.800.527.ꢁ011 (U.S.)  
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TM  
Garrett Metal Detectors. Copyright 2008  
All Rights Reserved.  
1524900.D.0408  
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