GARRETT ULTRA GTA™ 350 and GTAx™ 400 Detectors Owner Manual
GARRETT ULTRA GTA™ 350 and GTAx™ 400 Detectors are powerful metal detectors designed for coin hunting and treasure seeking. They feature a user-friendly touchpad interface with advanced discrimination capabilities. With adjustable depth and sensitivity settings, you can customize your search for specific targets. The detectors also offer automatic ground balance for optimal performance in diverse environments.
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OPERATING INSTRUCTIONS
ULTRA GTA 350 AND GTAx 400
DETECTORS
The control panels of these detectors have five (5) touchpads which control all the operating
functions of the detector. Beneath the Arm Cuff are the Battery Pack and the headphone jack.
TOUCHPAD CONTROL FUNCTIONS:
One Touch: Turns the detector on, off, or resets the detector to the factory settings.
Press once to turn the detector on.
As the detector starts the battery condition is checked audibly and displayed on the LCD
Display. Also, during the detector's start-up the detector adjusts automatically for the
elimination of ground minerals, and the audio threshold is set to a point that is just silent. The
last used pattern of discrimination is re-established and displayed on the LCD face.
Set Depth: (Also referred to as sensitivity). Permits the regulation of depth/sensitivity using the
+ and - touchpads.
Set Disc: (Discrimination): Permits the regulation and/ adjustment of the discrimination
pattern by turning on and off target cursors on the lower LCD bar which shows the items to be
rejected or accepted as targets.
+ and - Arrows: Used to move the Target ID cursor when setting the discrimination notches.
These arrows are also used to adjust the Depth/Sensitivity level.
Special Note:
If you are ever unsure about the settings of your detector, simply press and hold the One
Touch touchpad for approximately 10 seconds. The detector will emit an audio signal and the
factory default settings will be restored.
Graphic Display Information:
Above the LCD Display is a guide of targets for use with the Target Cursor to assist in the
identification of detected items. Note: All metal items will be indicated on the display but only
those that correspond with segments which are turned on will give an audio response.
The Upper Scale of the LCD indicates the target found. And, when the "Set Depth" touchpad
has been pressed, this scale indicates the Depth/Sensitivity setting.
The Lower Scale of the LCD indicates the discrimination segments. Those that are illuminated
represent the discrimination pattern established.
ULTRA GTA 350 AND GTAx 400
DETECTORS
The control panels of these detectors have five (5) touchpads which control all the operating
functions of the detector. Beneath the Arm Cuff are the Battery Pack and the headphone jack.
TOUCHPAD CONTROL FUNCTIONS:
One Touch: Turns the detector on, off, or resets the detector to the factory settings.
Press once to turn the detector on.
As the detector starts the battery condition is checked audibly and displayed on the LCD
Display. Also, during the detector's start-up the detector adjusts automatically for the
elimination of ground minerals, and the audio threshold is set to a point that is just silent. The
last used pattern of discrimination is re-established and displayed on the LCD face.
Set Depth: (Also referred to as sensitivity). Permits the regulation of depth/sensitivity using the
+ and - touchpads.
Set Disc: (Discrimination): Permits the regulation and/ adjustment of the discrimination
pattern by turning on and off target cursors on the lower LCD bar which shows the items to be
rejected or accepted as targets.
+ and - Arrows: Used to move the Target ID cursor when setting the discrimination notches.
These arrows are also used to adjust the Depth/Sensitivity level.
Special Note:
If you are ever unsure about the settings of your detector, simply press and hold the One
Touch touchpad for approximately 10 seconds. The detector will emit an audio signal and the
factory default settings will be restored.
Graphic Display Information:
Above the LCD Display is a guide of targets for use with the Target Cursor to assist in the
identification of detected items. Note: All metal items will be indicated on the display but only
those that correspond with segments which are turned on will give an audio response.
The Upper Scale of the LCD indicates the target found. And, when the "Set Depth" touchpad
has been pressed, this scale indicates the Depth/Sensitivity setting.
The Lower Scale of the LCD indicates the discrimination segments. Those that are illuminated
represent the discrimination pattern established.
Battery:
Indicates the condition of the detector's batteries. Batteries should be replaced when there is
only one segment illuminated.
ASSEMBLY INSTRUCTIONS:
1. Insert the Button ends of the Spring clip into the white lower stem. This will allow the overall
stem length to be adjusted for operating comfort.
2. Attach the lower stem to the searchcoil by inserting the two washers into the stem and slip
the searchcoil onto the stem. Insert the threaded bolt through the holes and hand-tighten the
two knobs.
3. Install the upper stem to the lower and then this assembly to the GTA housing by
depressing the two buttons and coupling the stem to the housing. Adjust for the most
comfortable operating length.
4. Wrap the searchcoil cable snugly about the stem with the first turn of the cable over the
stem.
5. Insert the cable connector into the connector on the housing and hand-tighten securely.
OPERATING INSTRUCTIONS:
Lower the searchcoil to a level about one foot above the ground.
Press and release the ONE TOUCH touchpad. The detector will give two (2) audio beeps, You
will then be ready to search. The Audio Threshold level is established , the Automatic Ground
Balance circuitry has set the parameters for the most effective search and the Discrimination
pattern is established for coin hunting.
SCANNING:
Scan the searchcoil in front of you in a straight line or a flat arc about your body. Keep the coil
level to the surface at a height of about one to two inches above the ground. This is
approximately grass-top height. The scanning speed should be about one to two feet per
second.
The presence of metal will be indicated by an audio sound and a LCD cursor on the Graphic
Display. Make two or three repeated scans over the target to determine precisely the targets
location. Listen for the loudest, most pronounced audio signal. The Target ID Cursor will
indicate the target's probable identity on the Display. The Target Guide above the cursor is an
aid in determining the identity of the target.
PINPOINTING:
Pinpoint targets by drawing an imaginary "X" on the ground with the searchcoil at the place
where maximum audio sound occurs. The searchcoil must be moving slightly for you to detect
the exact location of the target.
Indicates the condition of the detector's batteries. Batteries should be replaced when there is
only one segment illuminated.
ASSEMBLY INSTRUCTIONS:
1. Insert the Button ends of the Spring clip into the white lower stem. This will allow the overall
stem length to be adjusted for operating comfort.
2. Attach the lower stem to the searchcoil by inserting the two washers into the stem and slip
the searchcoil onto the stem. Insert the threaded bolt through the holes and hand-tighten the
two knobs.
3. Install the upper stem to the lower and then this assembly to the GTA housing by
depressing the two buttons and coupling the stem to the housing. Adjust for the most
comfortable operating length.
4. Wrap the searchcoil cable snugly about the stem with the first turn of the cable over the
stem.
5. Insert the cable connector into the connector on the housing and hand-tighten securely.
OPERATING INSTRUCTIONS:
Lower the searchcoil to a level about one foot above the ground.
Press and release the ONE TOUCH touchpad. The detector will give two (2) audio beeps, You
will then be ready to search. The Audio Threshold level is established , the Automatic Ground
Balance circuitry has set the parameters for the most effective search and the Discrimination
pattern is established for coin hunting.
SCANNING:
Scan the searchcoil in front of you in a straight line or a flat arc about your body. Keep the coil
level to the surface at a height of about one to two inches above the ground. This is
approximately grass-top height. The scanning speed should be about one to two feet per
second.
The presence of metal will be indicated by an audio sound and a LCD cursor on the Graphic
Display. Make two or three repeated scans over the target to determine precisely the targets
location. Listen for the loudest, most pronounced audio signal. The Target ID Cursor will
indicate the target's probable identity on the Display. The Target Guide above the cursor is an
aid in determining the identity of the target.
PINPOINTING:
Pinpoint targets by drawing an imaginary "X" on the ground with the searchcoil at the place
where maximum audio sound occurs. The searchcoil must be moving slightly for you to detect
the exact location of the target.
JUNK TARGETS:
The detector in its initial factory default settings, will not respond audibly to most junk items. On
occasion, the detector will respond with a signal that is not clear and sharp as that of a coin.
Before digging some of these "blips" see where the target registers on the Graphic Display.
For many trash targets the detector will show two cursors at once or will give varying target
identities as multiple scans are made over the item.
It is not unusual for a large object such as an aluminum soft drink can to give an audio signal
indicating that a good target has been discovered. This is nothing to be worried about. The
target has been located due primarily to its size, conductivity, and nearness to the searchcoil.
When you determine that it is time to turn the detector off, it takes only a simple press of the
ONE TOUCH Touchpad.
OPERATING ADJUSTMENTS:
When you press the ONE TOUCH Touchpad the first time, your detector is ready to operate
with the factory settings in place and the discrimination set to find coins while eliminating most
trash from detection. Many hunters never change from this "Notch" pattern.
The discrimination pattern is easily adjusted to meet the operating needs of any detector
operator. From locating only one specific item, to locating all metals, it is simply a matter of
pressing a couple of touchpads. Press the directional arrow to move the cursor either left or
right. When it comes to the position you wish to turn on or off, press the "Set Disc" touchpad.
The segment then is either illuminated or not . It is so easy to customize the discrimination
pattern to fit your own desires.
Another way to change the discrimination pattern is to search as normal and when an
unwanted target is encountered, press the "Set Disc" Touchpad and that segment will no
longer be illuminated.
A special note about detector operational settings. Any changes that have been made will be
retained when the detector is turned off. These changes will remain until changed by the
operator or until the detector is returned to the factory default settings by pressing and holding
the ONE TOUCH Touchpad.
When the Depth Touchpad is depressed, the display will show a row of segments on the upper
LCD bar. This is indicating the Depth/Sensitivity setting of the detector. Approximately 75% is
the factory default setting. Hunting in some locations there may an abnormal amount of static
or interference, in these instances it may be necessary to reduce the depth setting until the
audio sounds become stable once again. This is also the action to take when searching with a
companion and when near each other the detectors exhibit erratic and unstable operation.
When searching for very small or very deep items it might be beneficial to increase the depth
setting as much as possible, up to the point that the detector becomes unstable.
The detector in its initial factory default settings, will not respond audibly to most junk items. On
occasion, the detector will respond with a signal that is not clear and sharp as that of a coin.
Before digging some of these "blips" see where the target registers on the Graphic Display.
For many trash targets the detector will show two cursors at once or will give varying target
identities as multiple scans are made over the item.
It is not unusual for a large object such as an aluminum soft drink can to give an audio signal
indicating that a good target has been discovered. This is nothing to be worried about. The
target has been located due primarily to its size, conductivity, and nearness to the searchcoil.
When you determine that it is time to turn the detector off, it takes only a simple press of the
ONE TOUCH Touchpad.
OPERATING ADJUSTMENTS:
When you press the ONE TOUCH Touchpad the first time, your detector is ready to operate
with the factory settings in place and the discrimination set to find coins while eliminating most
trash from detection. Many hunters never change from this "Notch" pattern.
The discrimination pattern is easily adjusted to meet the operating needs of any detector
operator. From locating only one specific item, to locating all metals, it is simply a matter of
pressing a couple of touchpads. Press the directional arrow to move the cursor either left or
right. When it comes to the position you wish to turn on or off, press the "Set Disc" touchpad.
The segment then is either illuminated or not . It is so easy to customize the discrimination
pattern to fit your own desires.
Another way to change the discrimination pattern is to search as normal and when an
unwanted target is encountered, press the "Set Disc" Touchpad and that segment will no
longer be illuminated.
A special note about detector operational settings. Any changes that have been made will be
retained when the detector is turned off. These changes will remain until changed by the
operator or until the detector is returned to the factory default settings by pressing and holding
the ONE TOUCH Touchpad.
When the Depth Touchpad is depressed, the display will show a row of segments on the upper
LCD bar. This is indicating the Depth/Sensitivity setting of the detector. Approximately 75% is
the factory default setting. Hunting in some locations there may an abnormal amount of static
or interference, in these instances it may be necessary to reduce the depth setting until the
audio sounds become stable once again. This is also the action to take when searching with a
companion and when near each other the detectors exhibit erratic and unstable operation.
When searching for very small or very deep items it might be beneficial to increase the depth
setting as much as possible, up to the point that the detector becomes unstable.
BATTERIES:
GTA Series detectors require eight (8) AA batteries. They are contained in two battery holders
of four each. These holders slide into the Battery Pack beneath the Arm Cuff assembly. When
replacing batteries observe that the polarity of the batteries is correct in the holders and that
the holders are inserted in to the case with the rivet at the bottom of the holder towards the
center of the case. Failure to install the batteries correctly will result in electronic damage to
the detector which will require time lost from hunting and an avoidable expense.
The detector is supplied with Alkaline batteries for long life, but rechargeable batteries may be
used if desired. There is no provision for on-board recharging, however.
When storing the detector for extended periods the batteries should be removed from the
detector and from the holders.
Note: When re-installing batteries or after replacing batteries, the detector should be reset to
the factory default settings.
Battery Test:
Each time the detector is turned on the batteries are automatically and audibly checked. Three
or four bars on the battery scale indicate the batteries are very good, two bars and the
batteries are adequate. One single bar and it is time to replace the batteries.
MAINTENANCE
Always remember that your detector 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 you detector clean. Always wipe the housing after use, and wash the coil when
necessary. Protect your instrument from dust and sand as much as possible.
Your searchcoil is submersible. The control 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.
When storing longer that about one month, remove batteries from the detector.
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.
GTA Series detectors require eight (8) AA batteries. They are contained in two battery holders
of four each. These holders slide into the Battery Pack beneath the Arm Cuff assembly. When
replacing batteries observe that the polarity of the batteries is correct in the holders and that
the holders are inserted in to the case with the rivet at the bottom of the holder towards the
center of the case. Failure to install the batteries correctly will result in electronic damage to
the detector which will require time lost from hunting and an avoidable expense.
The detector is supplied with Alkaline batteries for long life, but rechargeable batteries may be
used if desired. There is no provision for on-board recharging, however.
When storing the detector for extended periods the batteries should be removed from the
detector and from the holders.
Note: When re-installing batteries or after replacing batteries, the detector should be reset to
the factory default settings.
Battery Test:
Each time the detector is turned on the batteries are automatically and audibly checked. Three
or four bars on the battery scale indicate the batteries are very good, two bars and the
batteries are adequate. One single bar and it is time to replace the batteries.
MAINTENANCE
Always remember that your detector 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 you detector clean. Always wipe the housing after use, and wash the coil when
necessary. Protect your instrument from dust and sand as much as possible.
Your searchcoil is submersible. The control 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.
When storing longer that about one month, remove batteries from the detector.
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.
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Key features
- Touchpad controls
- Adjustable Depth/Sensitivity
- Discrimination pattern
- Automatic ground balance
- LCD display with target identification
- Audio feedback
- Battery condition indicator
- Submersible search coil
Frequently asked questions
You can change the discrimination pattern by using the "Set Disc" touchpad to illuminate or de-illuminate segments on the lower LCD bar. This allows you to exclude or include specific target types.
The "Set Depth" touchpad adjusts the depth/sensitivity level of the detector. You can increase it for detecting deeper or smaller objects and decrease it for stability.
The battery indicator on the LCD displays the condition of the batteries. Three or four segments indicate good batteries, two segments indicate adequate batteries, and one segment indicates it's time to replace the batteries.