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5. Pass the same metallic targets (as used in 2)
across the bottom of the searchcoil and listen 
for the sound to increase only when certain 
items are scanned.  Notice the specific 
segments on the Upper Scale of the display 
that are highlighted when various targets are 
passed across the searchcoil.  

6.  Perform the same tests in the JEWELRY
Mode and observe the sounds produced by the
GTP 1350.

7.  Experiment with the ACCEPT / REJECT
touchpad.  Notice which of the 24 segments are
illuminated as you identify various targets.  

8.  Keep written records of the results and use
them when hunting in the field.Remember that
your detector is a sensitive electronic 
instrument, but is engineered to withstand 
rugged treatment in the outdoors.  Use your 
Garrett detector to the fullest extent possible,

39

Bench testing enables you to test typical trash items and
learn about the discrimination capabilities of the GTP
1350 before taking it into the field or attempting to alter
the Discrimination settings.  The following tests should be
performed as shown below with the searchcoil
perpendicular to a bench, floor or other non metallic
object.

1.  Select the ZERO Discrimination Mode.  (See
page 14)

2. Pass various metallic objects across the 
bottom of the searchoil at a distance of about 
two inches.  Each target will cause the sound to
increase, which represents true, non-
discriminating operation.

3.  Select the COINS Mode (See page 14)

4.  Press the OPERATE touchpad

38

Bench Testing

Summary of Contents for GTP 1350

Page 1: ......

Page 2: ..._____________ 22 LAST MODE _______________________ 23 and ____________________________ 23 3 NOTE In order to take full advantage of the special features and functions of the GTP 1350 carefully read th...

Page 3: ...Target ID Guide Legend _____________ 24 Upper Scale________________________ 24 Lower Scale________________________ 24 Numerical Reference Guide ___________ 25 Profiling Display_____________________ 25...

Page 4: ...Garrett s revolutionary Graphic Target Analyzer GTA display that offers target acceptance rejection precise discrimination and other key information you can spend more time digging treasure and less t...

Page 5: ...y parts 1 Compress and insert the button ends of the Spring Clip into the black Lower Stem Figure 1 This allows the overall stem length to adjust for operating comfort 2 Attach the Lower Stem to the S...

Page 6: ...he Lower Stem Figure 4 and then this assembly to the GTP Control Housing by depressing the two buttons and coupling the Stem to the Housing unit Adjust for the most comfortable operating length 5 Wrap...

Page 7: ...the OPERATE mode if no touchpads are pressed within 30 seconds MODE Discrimination Mode Press the or touchpad to select the desired Discrimination MODE COINS JEWELRY RELICS ZERO or CUSTOM The selecte...

Page 8: ...ng in locations where abnormal amounts of interference trash or other metal detectors are present In these situations reduce the sensitivity until the audio becomes stable 15 COINS MODE Designed to el...

Page 9: ...ul when hunting on saltwater beaches Tone ID Press the touchpad to activate the TONE ID 17 When searching for very small or very deep targets it might be beneficial to increase the sensitivity setting...

Page 10: ...BACKLIGHT The BACKLIGHT illuminates the LCD screen for low light or night hunting conditions BATTERY TYPE When using rechargeable batteries press the 18 Setting Function Tone ID OFF Profiling OFF All...

Page 11: ...r GTP 1350 to accept only that target Hunting in an area where a specific type of trash is abundant may be another reason to customize your Notch Discrimination settings You can reject the specific 21...

Page 12: ...uchpad Press and hold the PINPOINT touchpad to enter the PINPOINT Mode and find the exact location and coin depth of a target See page 29 for more information When the PINPOINT touchpad is released th...

Page 13: ...of the LCD screen the Profiling Display indicates the size of a target Small Medium and Large 25 Target ID Guide Legend An illustrated Target ID Guide is located directly above the LCD screen When hu...

Page 14: ...ECT on page 19 for additional information The 1350 is engineered with Automatic Ground Balance technology to continuously measure ground mineralization and automatically adjust itself for optimum perf...

Page 15: ...ned prior to entering the Pinpoint Mode 7 The PROFILING feature automatically activates upon releasing the PINPOINT PROFILING touchpad after Pinpointing the target When the PROFILING feature is 29 abo...

Page 16: ...as 1 2 seconds between consecutive beeps up to as fast as 0 4 seconds between beeps Be sure to maintain a continuous 14 inch sweep 31 activated a target s size is indicated as Small Medium or Large o...

Page 17: ...width is too narrow Maintain a 14 sweep width to correct this error Some targets may fall on or near the boundary of two sizes In such cases the PROFILING display may change between sizes on successi...

Page 18: ...as an aluminum soft drink can to give an audio signal indicating that a good target has been discovered due to its conductivity However the Profiling Display can aid in the identification of such targ...

Page 19: ...tect than items buried over time Experiment with various detection modes and pay close attention to audio Target ID and Profiling signals as you scan 37 As you walk scan the searchcoil from side to si...

Page 20: ...sensitive electronic instrument but is engineered to withstand rugged treatment in the outdoors Use your Garrett detector to the fullest extent possible 39 Bench testing enables you to test typical tr...

Page 21: ...orrectly may result in electronic damage to the detector The condition of the batteries is continuously displayed on the LCD display while the detector is turned on Five 5 or four 4 bars on the batter...

Page 22: ...observe the polarity of the batteries and place them in the holders 7 Replace the battery holders in the GTP 1350 43 operation and performance is not affected by battery condition until batteries are...

Page 23: ...detector speaker Headphones are particularly essential when hunting where noise of people and or traffic is excessive 45 Ensure the rivet on each side of the battery holder is visible in the center o...

Page 24: ...n cable cord is require you never have to worry about winding it around the detector s stem or carrying it with you When you slip the hip mount battery pack off and attach it to your belt with the bui...

Page 25: ...f you are not familiar with the GTP 1350 You have included a letter that fully describes the problem and conditions under which they 49 Avoid extreme temperatures as much as possible such as storing t...

Page 26: ...nd 4 p m C S T 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 secure all parts Do not s...

Page 27: ...ll people engaged in the field of metal detection 53 Fill holes and obey NO TRESPASSING signs A sincere request that Charles Garrett makes to every user of one of his detectors is that each hunt site...

Page 28: ...your Garrett GTP 1350 is a truly universal detector all of the RAM books will be pertinent to its use Of particular interest however will be The New Successful Coin Hunting by Charles Garrett filled w...

Page 29: ...sives or other items which when struck could cause personal injury When searching for treasure with your GTP 1350 observe these precautions Do not hunt in an area where you believe there may be shallo...

Page 30: ...Speaker 59 RAM Publishing Company 1881 West State Street Garland Texas 75042 Add 1 00 for each book maximum 3 00 for handling charges Total for books ______________ 8 25 Tax Texas residents _________...

Page 31: ...gs Sensitivity Threshold Detection Frequency Volume Tone and Full Range Multi Notch Discrimination Proof of Garrett excellence is the recognition given them by the following United States patents 4 70...

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