GOLDEN MASK DEEP HUNTER Pro 7 User manual

INSTRUCTION MANUAL

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Golden Mask Deep Hunter Pro7 –Instruction Manual
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Golden Mask Deep Hunter Pro 7 is a professional treasure and
relic hunting metal detector designed primarily to detect deeply
buried metal objects.
Golden Mask Deep Hunter Pro7 is a pulse induction metal
detector, with “flash automatic ground exclusion balance”,
“reject control” and full range “discriminate” between ferrous
and non-ferrous metals. It has developed as an upgraded and
advanced variant of well known machine Deep Hunter Pro3se,
feature the new “Smart Tune” system, which allow to get more
depth only by pressing one button.
Golden Mask Deep Hunter Pro 7 can significantly reduce the
negative effects of power line and other electrical interference.
Like the all Golden Mask Deep Hunter pulse detectors, this
detector offers remarkable stability, sensitivity and accuracy that
is achieved with the use of very simple and intuitive settings.
The Pulse Induction principle of metal detecting 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 quickly 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.

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1 .Detector set
1.1.Electronic unit with built-in 12.0V/2600mAh NiMH battery,
providing about 8 hours of continuous operation with per charge.
The electronic block is placed in a leather bag with a comfortable
strap for carrying during operation.
1.2. Search coils (antennas). The detector comes with a set of
different search coils selected by the customer at the order or
additionally purchased by an authorized dealer.
WARNING!
It is not recommended to use self-made coils or other
models of coils similar to the original ones! There is a real
risk of damage that will be not covered by the general
conditions of the warranty provided!
Golden mask Deep Hunter Pro7 can achieve its full potential
only with the antennas that the manufacturer has included as
well as the all kind of original antennas produced for each one
metal detector of the Golden Mask Deep Hunter series.
The main search antenna for the Golden Mask Deep Hunter
Pro7 is a square detachable frame that comes in two sizes -
125x125cm and 180x180cm.
For individual handling of the appliance, round or oval (hand-
held) antennas are used. They are attached to a wearing stick.
These antennas are suitable for areas where frame movement
is impossible, as well as for residential buildings (walls, floors,
ceilings), the vertical slopes of the terrain and other specific
search areas for buried metal objects.
1.3. Smart charger for the built-in NiMH battery.
1.4. This Instruction manual

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2.Operating Principle - high-frequency pulse induction
(advanced version) with full range “Smart tune” flash automatic
ground balance and multi-channel signal processing to identify
between ferrous and non-ferrous metals.
3.Settings
The Golden Mask Deep Hunter Pro7 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, 2 switches and 1 signal indicator.
“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;
“AUDIO TONE On/Silent”- knob for adjusting the “ticking”
frequency in absence of metal within the area of the search
antenna;
In position “On” the detector is in its core search mode. This
is a strictly individual adjustment and relates exclusively to the
individual auditory characteristics of the operator. It is thebest to
set a low “ticking” rate in the absence of metals near the coil.
This control does not affect the performance of the detector
and is designed solely to provide a better detection of weak
signals.

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When “AUDIO TONE On/Silent”is in position “Silent”the
detector is switched to “silent mode”. In this mode the detector
does not emit a “ticking” sound during the searches. The
presence of a metal object in the area of the search oil is
indicated by a low pitch tone (for ferrous metals) or high pitch
tone (non-ferrous metals).
"AGEB/MAN.GB" - mode switch:
- "AGEB"- mode of automatic soil elimination;
- "MAN.GB" - manual setting of the soil impact elimination
system (in this mode, the detector has about 15% higher
sensitivity).
"REJECT/GB" - "10-turn" potentiometer for precise adjustment
of: 1. the rejection of undesirable small metal objects in
“AGEB” mode;
2. the tune non-automatic ground-balance system of the
detector in “MAN.GB” mode;
3. the eliminating the impact of extremely heavy soils in
“AGEB” mode.
“SMART TUNE” –this button is used for fast tune of the
machine. It pressing for a 1 second make the detector more
stable and "deep". This feature is performed by special “smart”
retuning the all systems of the detector. It is used for removing
of interferences and noises encountered during the search
process too.
“GAIN”is a switch for choosing the gain control. It can be used
in two positions –“LOW”and “HIGH”. In position “HIGH”it
gives about 20% extra depth of detection without use of
additional battery power.

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Each time, after changing position of the switch “GAIN”, the
"SMART TUNE" button must be pressed for a second.
"SIGNAL" is a precision high quality 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. I is indicating a necessary of recharge the
built-in battery.
"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!
4. Elimination of soil impact (ground balance).
As with all other detectors, demand for metal objects in the soil
is accompanied by some difficulties. Overcoming these
difficulties is achieved by using different systems and devices
integrated into the electronics of the detector.
In order to achieve a more precise reject of soil impact on any
terrain, the Golden Mask Deep Hunter Pro7 uses specially
developed systems that, depending on the chosen mode of
operation, provide 2 different ways to search for metallic objects
by eliminating the influence of the soil. These methods are:
4.1 Auto Ground Balance
The well known unique Deep Hunter Golden Mask Pro3 "flash
auto ground balance system" is used. It is selected with the
mode switch and continuously rejects the signals caused by the
soil without the need for additional adjustments.

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To use this method:
1. Place the antenna on the ground surface.
2. Switch the mode to "AGEB"
3. Select sensitivity of the detector with "SENSITIVITY" and/or
“HIGH” or “LOW”gain of the received signal ("GAIN" switch).
4. Choose the level of rejections (REJECT/GB.)
4. Switch “On”the detector.
5. Raise the antenna from the ground at the working height (not
less than 10 cm) and press the "SMART TUNE" button for a
second.
6. The device is ready for use.
After some time, if the soil condition is needed, you should
change the rejection positions (REJECT/GB.)to eliminate the
noises of the ground and press and release the "SMART TUNE"
button.
4.2 Manual Ground Balance
The application of this method allows the use of the detector's
extreme sensitivity, but requires some skills that can be achieved
in the practice.
To use this method:
1. Place the antenna on the ground surface.
2. Switch the mode to "MAN.GB"
3. Select sensitivity of the detector with "SENSITIVITY" and/or
“HIGH” or “LOW”gain of the received signal ("GAIN" switch).
4. Switch “On”the detector.
5. With the "REJECT/GB" potentiometer rotated clockwise or
counterclockwise, the detector will be adjusted to a sound
threshold, providing a quiet with a few hertz frequencies.
6. Raise the antenna from the ground at the working height (not
less than 10 cm) and rotate "REJECT/GB" potentiometer
counterclockwise very carefully to find the best working sound of
the detector. It may be needed only a few positions on the scale.
7. The device is ready for use.

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5.Search for metal objects with frame search coil.
The Golden Mask Deep Hunter Pro7 is designed to be used
mainly with large “frame” type search coils. This is the most
effective way to search for deeply buried metal objects.
The search coil must be 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 the frame set of PVC
pipes and fittings for assembling structure of the frame. The “coil-
cable loop” is composed of series-connected conductors in a
multi-conductor special cable which form a transmit-receive coil.
The “coil-cable loop” is mounted onto the 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” requires 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.
Another way for individual work with a “frame” type search coils
is when the operator stands/walks 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
Deep Hunter Pro7detector 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!

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If you do not have an assistant, “dragging” of the search “coil-
cable loop”, mounted on a non-metallic type “sled” frame (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 “SMART TUNE” 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 objects with handle-mounted coils.
When the terrain does not allow searching with a “frame” coil,
Golden Mask Deep Hunter Pro7 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 handheld
coil is to replace the “frame” in inaccessible areas and provide
an opportunity for individual work, without an assistant. The
movement with handheld coils should be done very slowly.
Unlike traditional VLF metal detectors, using the principle of
inductive balance, the Golden Mask Deep Hunter Pro7 can
detect metallic objects without motion. The movement is only
necessary to identify the type of metal, and a speed of about 1
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

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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 object within the coil
area.
The signal from a metal object, located in the area of the search
coil is indicated by increasing the frequency of the sound signal
(“ticking” sound).
Most weak signals an operator is able to notice are improved by
doubling the preset frequency of the sound which is set with the
“AUDIO TONE On/Silent”knob before searching starts. This is
perceived accurately by the human ear and therefore it needs to
be set very precisely, so that the sound frequency 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 Pro7 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
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

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outside the target area, press the “SMART TUNE” 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 Pro7.
8.Signal control amplification (“GAIN”).
There are two positions –“LOW”and “HIGH”. “LOW”is the
main one. The more amplification of the received signal is
provided in “HIGH” position and it will be increased the depth of
detection (about 20%). But Its’ use is recommended only after
acquiring 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
“GAIN”switch 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 "AUDIO
TONE On/Silent" knob, when it is set to "Silent". 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 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.

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10.Rejection of small metal objects and “noises” of ground.
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 and/or ground “noises” could be indicated.
Decreasing the sensitivity and/or use of “Silent” mode
sometimes could return acceptable results, but the Golden Mask
Deep Hunter Pro7 provides the ability to eliminate small metal
objects without reducing the sensitivity. This is accomplished
with the “REJECT/GB”knob. The lower the value selected with
this it, smaller metal objects are detected and ground “noises”
could be heard. After doing some tests with multiple "samples"
of different metallic objects with different sizes, you will find
which values of the “REJECT/GB”settings are the best for your
needs.
The “REJECT/GB” is a 10-turn potentiometer and should be
used its full 10 turns to find desired value for the small metal
pieces and ground “noises” which have to be rejected.
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 in
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 110-240V and connect the automatic charger
into the outlet.

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The charging process is indicated with a RED-color LED
light on the charger housing.
When the charging is completed, the LED light turns blue.
The duration of charge of a discharged battery is about 4 -
8 hours.
When the charge is completed, remove the charger from
the power socket and then remove the charger jack from the
connector “Charge”.
3. Turn “On” the detector and check the charge level by
pressing “Battery Check” button. If the reading is lower than “8”,
reconnect the charger and repeat the charging process!
To replace the battery, you should contact your Golden
Mask Deep Hunter Pro7 dealer.
12.Relative depth of detecting of metal objects.
Golden Mask Deep Hunter Pro7 enables the operator to
combine device settings and use it in 4 different modes of
working using 2 different ways to reject the impact of the soil.
When working on "heavy" terrains, lower-order modes are
preferred.
1.AUTO GROUND BALANCE
MODE
AUDIO TONE
GAIN
Depth [%]
A1
Silent
LOW
65%
A2
Silent
HIGH
75%
A3
On.
LOW
100%
A4
On.
HIGH
120%
2.MANUAL GROUND BALANCE
MODE
AUDIO TONE
GAIN
Depth [%]
M1
Silent
LOW
70%
M2
Silent
HIGH
80%
M3
On.
LOW
115%
M4
On.
HIGH
135%

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Operating Notes
1. If, while searching, random disturbances or prolonged
changes of the frequency of the sound signal (false signals)
appear, the “SMART TUNE” button should be pressed and
released. This action can be repeated several times to ensure
complete elimination of the interference and re-establish stabile
operation. Reducing the “SENSITIVITY” and/or switch “GAIN”
to “LOW” will also reduce the interferences.
2. After the detector is turned “Off”, the red LED “Battery!” will
be lit for a second or two. This does not indicate a battery
problem. Only when this LED lights-up when the detector is
turned “On” (running), you should charge the battery.
3. Keep a consistent height of the coil above the surface during
the search to ensure optimal functioning of the systems to
eliminate the influence of the ground and the maximize detection
depth.
4. Do not use (or leave) the detector in a humid environment or
in wet bushes, snow and/or water –the electronics unit could be
damaged as it is not sealed. When you connect the coil to the
electronics, you should prevent the entry of dirt or moisture in
and around the contact pins of the connectors.
5. Working with the detector in industrial areas and places with
a large amount of metal junk in the soil, and/or with presence of
industrial electromagnetic interferences, can lead to instability
and/or inability to work. This requires reducing the sensitivity of
the device with the “SENSITIVITY” knob, which will reduce the
depth of detection, but it is the only way to achieve stability in
such conditions.
6. After extensive work with the detector, with repeated
attachment and removal of search coil connectors, the
connector could be damaged - please carry out these activities
very precisely and carefully to avoid costly and severe damage.
Contact points of the connector should be kept clean and dry.

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7. If the indicator “SIGNAL” meter shows a negative value
(arrow deviates to the left of zero) after lifting the coil from the
ground, this means that a metallic object was located under the
coil. In such cases, move the coil to another location, turn on the
device again, press briefly the “SMART TUNE” button and start
the search.
8. Switch-on the detector for about 15 minutes in the area of
search before starting to search for metal objects. During this
time the Golden Mask Deep Hunter Pro7 electronics are self-
adjusting to the ambient temperature/humidity and the detector
reaches its optimum operating capabilities.
9. Do not attempt to use the detector after the built-in battery is
discharged as this can result in damage to the battery and/or the
electronics.
10. Always keep the electronics clean from dust, grease and
moisture. Use only dry and soft cotton cloth for cleaning.
11. If you use the detector in areas where there is possibility of
the presence of buried weapons and/or explosives, you must
proceed with great caution. The manufacturer and the dealers
are not responsible for the any damage or injuries resulting from
such use of the detector.
12. If you are looking for metal objects in areas where there
could be underground pipe or electrical lines, you must call the
relevant authorities responsible for the maintenance of these
lines for permission. Do not perform excavation without proper
permission. This is especially important in regions in and around
cities and industrial sites.
13. The use of high-quality headphones (not included)
connected to the “PHONES” socket will help achieve better
results.
14. The manufacturer and the dealers are not liable for trespass,
damages or injuries that could result from any use of the Golden
Mask Deep Hunter Pro7.

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