GOLDEN MASK DEEP HUNTER Pro3 User manual

Instruction manual

GM Electronics Ltd.
Golden Mask Deep Hunter Pro3 is a professional treasure and
relic hunting metal detector designed primarily to detect deeply
buried metal objects and discriminate between ferrous and non-
ferrous metals.
Golden Mask Deep Hunter Pro3 is an advanced pulse induction
metal detector, with newly developed full range “flash automatic
ground exclusion balance”, “trash re ect control” and
discriminate between ferrous and non-ferrous metals. Its
powerful performance is based on the very high uality state-of-
the-art sophisticated electronics.
Golden Mask Deep Hunter Pro3 can significantly reduce the
negative effects of power line and other electrical interference.
This detector offers remarkable stability, sensitivity and accuracy
that is achieved with the use of very simple and intuitive settings.
Pulse induction is based on the processing of short and intensive
magnetic pulses which are emitted by means of a search coil.
Those magnetic pulses produce electrical eddy currents in
conducting metallic objects. Eddy currents will be stored in a
metallic object around of the search coil but will uickly die away
after the magnetic pulse emitted by the search coil has ended.
The eddy currents and their time delay are read by the receiving
phase by the search coil which now acts as a receiving coil. The
received signal is amplified to drive an audio response via built-in
loudspeaker or headphones when a metallic object is within the
field of the search coil.
Eddy currents produced in a metal object by means of the high
intensity pulsed primary field will die away at different rates
depending on the conductivity of the metallic object encountered.
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GM Electronics Ltd.
1.Golden Mask Deep Hunter Pro3 Set
1.1 Electronics Unit
It has a built-in 12.0V/2600 (3700) mAh NiMH battery, providing
up to 8 (12) hours continuous use per battery charge. The
electronics unit is housed in a protective leather case with an
around-the-neck carrying strap. Never remove the electronics unit
from the leather case as the unit can be damaged and the
warranty will be void.
1.2 Search Coils
The detector is delivered with a variety of coils as desired by the
customer. The use of self-made or other brands of coils will
damage the Electronics Unit and will void the warranty. The main
search coils of the Golden Mask Deep Hunter Pro3 is a s uare
frame made from PVC pipes, unions and elbows that form the coil
support frame. The antenna is a special cable-like loop that is
attached to the support frame with Velcro straps. Searching with
this type of antenna is a two person effort. For individual searches
(without an assistant), round coils are attached to the handle with
a built-in arm rest. Round coils are suitable for areas where the
movement of the frame coil is difficult or impossible, as well as in
residential areas (walls, floors and ceilings), and on steeply
sloped terrain.
1.3 Golden Mask Deep Hunter Pro3 smart battery charger
1.4 This Instruction Manual
2.Operating Principle - high-fre uency pulse induction
(advanced version) with full range flash automatic ground balance
and multichannel signal processing to identify between ferrous
and non-ferrous metals.
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GM Electronics Ltd.
3.Settings - Golden Mask Deep Hunter Pro3 has extremely
simple and intuitive settings, that include 4 knobs (of these: 2 with
switching function - one for switching-on/off the unit and 1 for the
special “Silent” mode), 2 buttons, 1 switch and 1 special
indicator.
“VOLUME On/Off” - knob for adjusting the volume and “Switch
On” – “Switch Off” of the detector;
“VOLUME ON/Off” - knob to switch “ON/Off” the detector and
adjusting the level of sound.
“SENSITIVITY” - knob to adjust the sensitivity of the detector;
“CRACKLE On/Off”- knob for adjusting the “ticking” fre uency in
absence of metal within the area of the search antenna; In
position “On” the detector is in its core search mode. This is
strictly individual adjustment and relates exclusively to the
individual auditory characteristics of the operator. It is best to set a
low “ticking” rate in the absence of metals near the coil. It does
not affect the performance of the detector and is designed solely
to provide a better detection of weak signals.
When CRACKLE On/Off” is in position “Off” the detector is
switched to “Silent” mode, with this mode the detector does not
emit a “ticking” sound during searches. The presence of a metal
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GM Electronics Ltd.
object in the area of the coil is indicated by a low pitch tone (for
ferrous metals) or high pitch tone (non-ferrous metals). In this
mode, the detector's sensitivity is lower, but it is suitable for work
in conditions of heterogeneous and/or highly mineralized soil,
including the presence of ceramic residues and/or small metal
objects that are not desired for detection.
The “TRASH” knob is for rejecting undesirable small pieces of
metal and noise reduction in extremely mineralized soils. A higher
value rejects more objects.
The “RETUNE” button is for uick readjustment and stabilization
of the detector by removing interferences encountered during the
search process. “BOOST” is for amplification of the received
signal: in position “ON” it gives about 20% extra depth of
detection without use of additional battery power.
After turning the switch “BOOST” to “ON” position, "RETUNE"
must be pressed.
"SIGNAL" is a precision high uality analog meter indicating the
strength of the received signal and the level of charge of the built-
in battery; there are 3 embedded LEDs for indicating the type of
the metal and the condition of the battery: "Fe", "n-Fe" - LED
indication of the type of metal - green for ferrous metals and red
for non-ferrous metals;
"Battery!" is a LED for indicating less than 10% residual charge
of the built-in battery, indicating a necessary recharge (see #11);
"Battery Check" - button to check the level of battery charge.
This button can be used at any time when the detector is switched
“ON”. When the arrow is in the red sector, the battery should be
recharged!
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GM Electronics Ltd.
4.Ground Balance.
The Golden Mask Deep Hunter Pro3 provides full range
automatic ground balance based on a proprietary “Flash Auto
Ground Balance” system that is uni ue to this detector. It does
not need any settings and continuously rejects the signals
generated by changing soil conditions encountered while
searching.
In extremely high mineralized soils the noises can be reduced
additionally by the “TRASH” control knob or by reducing the
“SENSITIVITY” of the detector (decrease the value) and/or
switch “Off” the “BOOST” function.
5.Search for metal ob ects with frame search coil.
The Golden Mask Deep Hunter Pro3 is designed to be used
with large “frame” type search coils. This is the most effective way
to search for deeply buried metal objects.
The search coil is moved slowly at a constant height (15 cm or
more) above the ground. Coils of type “frame” are delivered in the
form of “coil-cable loop” in length corresponding to the respective
size of the supporting frame and a set of PVC pipes and fittings
for assembling the supporting structure of the frame. The “coil-
cable loop” is composed of series-connected conductors in a
multi-conductor special cable which form a send-receive coil. The
“coil-cable loop” is mounted onto a frame of PVC pipes, unions
and elbows attached to the PVC frame using the included “Velcro”
cable straps. The connecting cable is plugged into the connector
labeled “Coil”, which is mounted on the right edge of the front
panel of the electronics unit. The connector ring must be
tightened.
The search with a “frame” re uires an assistant who controls the
level horizontal movement of the frame, using the included belts.
With another belt, the operator determines the height and
direction of movement and controls the detector.
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GM Electronics Ltd.
Another way for individual work with a “frame” type search coils is
for the operator to stand/walk inside the frame holding both belts
while controlling the detector.
WARNING!
The use of this method, and/or any “entry” of the operator
or another assistant inside the “frame” of the Golden Mask
eep Hunter Pro3 detector while in working mode can suffer
adverse effects caused by the very strong electromagnetic
field that can lead to serious health problems and/or injuries!
If you do not have an assistant, “dragging” of the search coil on a
non-metallic sled (PVC, for example) is recommended. The sled
must provide a constant height (about 15 cm or more) of the
frame from the ground surface. The search should always begin
with a brief pressing of the “RETUNE” button (the same is
recommended to be carried out periodically during the search) in
order to maintain maximum stability and sensitivity.
The movement of the antenna should be carried out in parallel
bands that overlap by up to 30% in order to not miss any portion
of the search field. The speed of movement should be about 1
yard per second.
6.Search for metal ob ects with handle-mounted coils: When
the terrain does not allow searching with a “frame” coil, Golden
Mask Deep Hunter Pro3 can be used with handle-mounted
round search coils. Search with such antennas does not differ
from the search with a “frame”. The round coils are much more
sensitive to identifying small objects and should be used for such
searches. In addition, the purpose of the round coil is to replace
the “frame” in inaccessible areas and provide an opportunity for
individual work, without an assistant. The movement with round
coils should be done very slowly.
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GM Electronics Ltd.
Unlike traditional VLF metal detectors, using the principle of
inductive balance, the Golden Mask Deep Hunter Pro3 can
detect metallic objects without motion. The movement is only
necessary to identify the type of metal, a speed of about one m/s
is sufficient for the discrimination system to function properly.
The search height above the ground surface with the round coils
antenna must be constant (about 10 cm or more).
If you hold the coil too low or touch the ground, you will
experience faulty signals. All activities and settings recommended
for the use with “frame” coils apply as well to searches with “hand”
the round coils.
7.Indication of the presence of a metal ob ect within the coil
area: The signal from a metal object, located in the area of the
search coil is indicated by increasing the fre uency of the sound
signal (“ticking” sound).
Most weak signals an operator is able to notice are improved by
doubling the preset fre uency of the sound with the “CRACKLE
On/Off” knob. This is perceived accurately by the human ear and
therefore it needs to be set very precisely, so that the sound
fre uency without the presence of a signal to be only a few Hz
(slow “ticking” sound).
Each “signal” has “start” and “end”. The Golden Mask Deep
Hunter Pro3 has a very well expressed “zone” indication from
deeply buried metal objects with the use of a frame coil. The
length and width of this “zone” is a guide to the depth/size of the
metal objects. When this length is greater than the size of the
search antenna and has an expressed peak in the middle this
certainly indicates a deeply buried metallic object. If the signal is
of a short duration (small area), but is captured only in the central
part of the coil, then you can also expect a deeply buried metal
object. Double audible responses corresponding to the passage
of the front and rear ends of the “frame” over the metal object are
a sure indication of relatively small metallic object not deeply
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GM Electronics Ltd.
buried. The use of a round coil gives a slightly different and
shorter signal compared to frame coils. After reaching a certain
signal strength (which will be indicated on the indicator
“SIGNAL”), the identification of the type of metal through the
LEDs mounted in the indicating “SIGNAL” will start to work. The
red color indicates non-ferrous metals and green indicates ferrous
metals (iron). To present a high probability of proper metal type
identification, when you detect a target, move the coil outside the
target area, press the “RETUNE” button and then pass the
antenna over the target from a different direction. Repeat as many
times as you want to identify the type of the metal more securely.
With a little experience, anyone can learn to recognize the nature
of the various signals, which will lead to better use of the great
capabilities of the Golden Mask Deep Hunter Pro3
8.Signal additional amplification (“BOOST”).
The additional amplification of the received signal provides
increased depth of detection (about 20%), but Its’ use is
recommended only after ac uiring some experience in working
with the unit, since increased sensitivity could lead to increased
number of ghost or false signals. Setting different values of the
“SENSITIVITY” and using the “BOOST” button can lead to
different behavior of the device. You will understand this function
with practice and experience.
9.“Silent” Mode
In “Silent” mode the detector can be switched with the
"CRACKLE On/Off" knob, when it is set to "Off". This mode can
be chosen at any time. In “Silent” mode the “ticking” sound is not
heard and the presence of metal target will be indicated with a
high pitch tone for non-ferrous metals, and low pitch tone for
ferrous metals. In the “Silent” mode the sensitivity is lower, but
this mode is very suitable for highly “trashy" sites (where some
small, mainly iron metal objects are present, and these objects
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GM Electronics Ltd.
are not an objective of the search). In “Silent” mode, the detector
achieves a better “rejection” of junk metals and provides a much
more efficient search of large objects.
10.Re ection of small metal ob ects.
Often, in an area where large metal objects are searched for and
the metal detector is set to high sensitivity, many (unwanted)
small metal targets could be indicated. Decreasing the sensitivity
and/or use of “Silent” mode sometimes could return acceptable
results, but the Golden Mask Deep Hunter Pro3 provides the
ability to eliminate small metal objects without reducing the
sensitivity. This is accomplished with the “TRASH” knob. The
lower the value selected with this knob, smaller metal objects are
detected. After doing some tests with multiple "samples" of
different metallic objects and sizes, you will learn which values of
the “TRASH” settings are best for your needs.
11.Charging the built-in battery: To ensure longer life of the
built-in battery it must be charged with only the supplied charger.
You should regularly check the charge level of the built-in battery
with the button “Battery Check” (inspection is possible only
when the detector is switched “On”) and you must turn off the
detector once the red LED "Battery" (located in the lower right
corner of the indicator) is lit.
To charge the built-in battery :
1. Turn “Off” the detector, remove the coil jack and plug the
charger jack into the connector labeled “Charge” on the front
panel of the device.
2. Place the detector in an upright position near a power
outlet with voltage 120-240V and connect the automatic charger
into the outlet.
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