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REX
TM
Metal Detectors
Delta 4
User’s operating manual
Made in EU
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In order to use the device for a maximum long time and without problems, as well as to
be able to use all of its options, please read carefully the whole instruction manual and
observe the directions in it.
Your Delta4 is shipped with these parts:
- Upper Pole Assembly – fully assembled, including upper pole stem with
handle grip
- Middle pole assembl y with pole lock
- lower pole - made of wood in order to not disturb the work of the coil.
- 27 cm DD search coil
- electrical set box – made of extremely strong plastic, including 10 AA
batteries NiMH 1,2V/1000mAh or 2700mAh.
- 220V automatic charger
- Operation instruction manual
Warranty card
If any of these items are missing, immediately inform us, or our autorized
dealer where you purchased your detector.
Assembling the Delta4 is simpl e a nd y o u don ’t ne e d an y spec i a l to o ls. Just
mount the search coil on the lower pole assembly, connect the pole assemblie s
together, adjust the pole length, wrap the excess cable around the pole and plug
the cable into the control unit. Finally adjust search coil angle to your
preference and you are ready.
NOTE: Do not allow the cable to flop loosely over the search coil. Since the
detector is sensitive enough to „see― the tiny wires in the cable, a floppy cable
can cause false signals as the search coil senses the moving wires.
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CONTROLS: The
Delta4
control panel:
- ― GROUND REJECT‖ – eliminates influence of the soil.
- Switch ― MANUAL / AUTO‖ – Switches between ‖M A N UAL ‖ and ― AU T O ‖
ground reject.
- ― DISCR‖ – regulates degree of elimination of iron and unwanted objects.
- ― THRESHOLD‖ – used for adjusting sound level and regulates depth of.
- ― Battery low‖ – blinking li ght indicator. Indicates lower tension of batteries
- ― ON / VOLUME‖ – switches on the detector and adjust sound level
- Jack ―Phones‖ (on the bottom side of the box) – used for head phones
1. Assembling of the device:
The bearing rod is assembled by inserting of the lower part into the upper one. Choose the
desired length of the whole construction and the fixing clamp is tightened between both parts of
the bearing rod. The lower part of the bearing rod is put with the opening between the ears of the
coil and the plastic bolt is tightened by choosing the position of the coil to be parallel to the
ground surface. The coil cable is wind up tightly around the bearing rod and is switched to the
terminal of the monitor unit. Upon switching of the cable of the coil to the monitor unit, tighten
the well the metal nut of the coupling to the terminal of the box. Upon switching off, unscrew the
nut completely and pull out the coupling without pulling or twisting the cable of the coil. This
way, you will prevent the cable and the conductors in it f rom breakdown or short circuit.
The searching coil is approached to the surface of earth by paying attention to
avoid presence of metals within its range.
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2. Switch on and work with Delta4.
1. T u rn the ―ON / VOLUME‖ kno b t o ― ON‖ an d ad j ust pre f ere n c e volume of
sound.
2. Setting the ― THRESHOLD‖ - While holding the detector a few feet above
ground and away from any metal object, slowly turn the ― THRESHOLD” knob
until you hear a very slight audio tone through the speaker or headphones. This
is the optimum set-point for the ― THRESHOLD”. A lig h t ― b u zz‖ adjustment is
recommended to insure optimum depth and maximum performance.
As ― THRESHOLD‖ is in l ow posit i on, a s l o w i s s ens i t ivi t y. Too low of a
threshold setting may cause ver y weak signals to not be heard. Too high of a
threshold setting may cause operating instabilit y.
3. You can work in manual or in automatic ―GROUND REJECT‖ mode:
- In manual ground reject mode:
Swit c h in ―MANUAL‖ position.
Search for and select a clear piece of ground or sand that does not contain any
metallic targets. With the coil elevated at least waist high and away from any
metallic target, slowly adjust the THRESHOLD control until a very faint audio
threshold signal is heard.
Lower the search coil to within one-inch of the ground surface while listening
to the threshold audio signal. If the threshold signal is high tone, the
―GROUND REJECT‖ control needs to be decreased (r otate counter clockwise).
If the threshold signal is low tone, the ―GROUND REJECT‖ control needs to
be increased (rotate clockwise). Keep repeating this step until threshold signal
is the same within one-inch of the ground as it is in the air. Once this is
accomplished, the detector is properly ground balanced.
When the ground mineralization is rejected, the detector can see deeper targets,
and is less susceptible to ground interference.
While balancing the detector, you have to be sure there are no metal objects
around the search coil. If it seems difficult or impossible to get little change in
the steady threshold as the coil is lowered, you may be attempting to tone on
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2 - 20cm.
top of a peace of metal. Move to a different spot on the ground and repeat
balancing.
Fig. 1
- In automatic ground reject mode: switch in ― AUTO‖ position.
The ,,GROUND REJECT‖ knob do not ha ve to b e tu r n ed on at that ti m e ! ! If
you come upon non-ferrous metals /gold, silver, copper, bronze/ a high-toned
sound can be heard; and if you come upon ferrous metals there will not any
sound signal. Without the ability to cancel ground mineralization, a metal
detector could respond to mineralization as if it where a good target.
Alwa ys t r y t o b a lanc e i n ― MANUAL‖ mode, and if it seem difficult or
impossible to get little change in a steady threshold as coil is lowered, we
rec o mmend u s e ―AUTO‖ mode. Use ―AUTO‖ when you find yourself in a
situation that does not allow‖ GROUND REJECT‖ to be adjusted correctly in
―MANUAL‖ mod e .
The ground conditions are really bad with mineralized ground, hot rocks and
iron trash, so your sweep speed must be reduced for best results.
―AUTO‖ is recommended when searching in wet salt sand too.
NOTE: Under some severe mineral conditions ground balancing may not be
possible. The best result you will get if searching when the soil is dry.
Delta4 working in dynamic regime - searching metal objects is made b y moving
search coil toward ground surface – fig.2 , fig.3
Fig.2
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Wrong Correct
Fig.3
The search coil should not touch the ground during your sweep. The pole length
should be adjusted to allow this without having to lift the detector with your
elbow or shoulder. The search coil should rest about one inch above the ground
while you are standing erect. The angle of the search coil should allow the
bottom to be parallel to the ground.
3. “ DIS C R” is used to eliminate any target that you do not want the
detector to audibly respond to.
If you need to eliminate more ferrous metals over the ground, the “ DISCR”
control must be set in a pos i tio n o v er ―Rings‖ o r ― Coins‖. If yo u c o me upo n
non-ferrous metals /gold, silver, copper, bronze/ a high sound can be heard; and
if you come upon ferrous metal a low sound is heard. If the “DISCR” control is
in ―Iron‖ pos i t ion , e v er y ferrous ob je c t w i ll b e signalized with high tone (like
non – ferrous). I f t h e so i l is t oo mine r ali z e d w e rec o mm e n d t h e ― Foil‖ p osi t ion .
4. Pinpointing a Target
A good method for pinpointing is "X-ing" the target with the search coil.
Remember that the target's response sound is always greatest when the target is
directly under the center of the search coil. To "X" a target, sweep the search
coil over the target from side to side and then from front to back until you can
identify the center of the X— the spot on the ground where the target response
sound is the greatest. Pinpointing a target is probably best done by "X -ing" as
well. Remember that the detector will beep just as the target passes under the
center of the search coil. Slowing the sweep speed down will help you pick out
the center of the X, but remember that the search coil must always be moving
slightly for target detection.
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Another easy meth od is to sweep the coil from side to side across the target in
very short sweeps as you slowly move forward and backward across the target.
Slow down the sweep rate and shorten the sweeps until you just barely get a
response at o ne spot. The target will be directl y below the coil center at this
response time – fig.4
fig.4
5. The detection depth depends on the following:
-size, shape and location of the object in the soil. The bigger the reflecting
surface of the object the deeper it is to be found;
-soil composition and mineralization level – the drier and more homogeneous
the soil the easier it will be to adapt the device and for the device to detect
deeper. Under stones, dry sand or in clay ute nsil, metals are easier to be found
than in freshly dug out or damp soil.
-the longer the object has been in the soil the easier it will be to be found as a
result of the good contact with the soil.
-type of detecting coil. The bigger the diameter of the coil the deeper it will be
able to detect metals.
-operator's experience and skills.
You can do field tests by yourself using the device if you bury different metal
objects in different depth but you should leave them in the ground for at least
3 months. Thus the test results will be more reliable. You should mind the soil
type and the moisture composition in it. Best results are received when the soil
is dry.
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To reduce false signals when searching in a very trashy ground, scan only a
small area at a time using slow, short overlappin g sweeps.
Keep the search coil moving at a comfortable rate. If you walk too fast, you
can ’ t ov e rlap you r s s w eep s an d yo u wil l mi s s a lot of groun d . A l so i f y o u sweep
too fast, you will lose sensitivity and miss the deep targets
6. Using a headphone
You should always use a headphone whenever you search with your metal
detector. Head phone is especially useful in noisy area, such us the beac h and
rear city area. It enhances audio perception by bringing the sound directly to
your to yo u r ears wh i l e mask i ng ―o u t side ‖ n ois e i nt e r fe r e nce s . Y ou sh e l l be
amazed at how much better you can hear the detector signals with the
headphone than you can with the speaker alone. Using head phones also save
battery power.
To connect a headphone to the detector, insert the headphone jack into the
―Phones‖ o n t h e bottom side of the box.
NOTE: The detector internal speaker will be disconnected when you
connect a headphone.
7. Charging storage batteries and indications for their status.
If a l i g ht ― Low battery‖ appe a rs w hil e us i n g t h e d ete c t or tha t me ans yo u
have to stop using it and recharge the batteries as follows: put the jack of the
charge device into ― CHARGE‖ n est a nd p l ace t he device into electric net of
220V.
The charging is automatic and begins when the device is SWITCHED
OFF and you plug the charger into the charging jack of the back panel of the
device. The jack cage is ―-‖ an d the mid d l e t e r min a l is ― +‖.
Charging dependi n g o n t h e l e v el o f d isch a rge of t he b att e r ies . It ’ s n o t ne c ess a ry
to keep eyes on charge device, because it is supplied with automatic turn off
and ba t t eri e s c oul d n’t be d a mage d n o matt e r h ow lo n g the y wi l l s ta y i n t h e
charge device. The charging continues till the moment when the batteries reach
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their maximum capacity. When reaching their full capacity the red light on the
charger will not light any more.
When they are ready pull the device out of the electric net and unplug the jack
out o f t h e ― CHARGE‖
NOT E : D o n ’t u np l u g t h e c h a rge r if char g e p r o ces s is n ot finished.
Always charge device's storage batteries ONLY with the paired chargers to
it. Thus yo u w i l l p r e ven t da m age s o r co n f usio n b e t we e n “ + ” a n d “ -” b eca u s e
the use of other chargers or adaptors may lead to irretrievable damages in
the batteries!
8. Possible problems during exploitation of Delta4:
1.When switching it on you can not hear a sound, no indication that the
device is switched on. It might indicate for:
-storage batteries are dead (usually after a long period of time). Charge the
batteries with the charger. If the problem is not solved contact the service station (office) of the company manufacturer or the loca l distributor.
-the accumulator block consists of 10 elements 1,2V / 1000mAh (or 2700mAh)
connected in series. If just one of t hem is damaged t he connection between
them will be destroyed and practically the device will be left without power
supply.
2. The working depth is significantly shallower than the normal. It might
indicate for:
- storage batteries could be dead – charge the batteries with the automatic
charger. If you can not solve the problem contact the service-station (office) of
the company manufacturer or the local distributor.
3.During detection the device does not work stable, makes strange sounds
which are not due to a metal detection. It might indicate for:
-irregular electromagnetic external in terruptions.
-problems with the aerial cable – disconnected conductor, a shot circuit or bad
connection in the coupling.
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It is possible after continuance work and many times of switching on and
off the cable's coupling to the jack box the contact between them to be
destroyed. There are 2 terminals with sight holes in the jack of the back panel
of the device. Put something sharp like a knife or a screwdriver in the sight
holes and make them wider. Thus the coupling will fit better into th e jack which
will improve the contact between them. It is possible in the presence of some
kind of dirty like dust or moisture to clean the terminals with cotton-wool and
alcohol. If you can not solve the problem contact the service-station (of fice) of
the company manufacturer or the local distributor.
4. The device works only with headset and when working with amplifier
you can not hear a sound. Usually that happens when the headset jack is
damaged. In that case contact the service-station (office) of the company
manufacturer or the local distributor to change the jack.
5. Batteries charge quickly and after that during the working process the y
go dead quickly. Usually that happens when the batteries are really old and
need replacement. Contact the service-station (office) of the company
manufacturer or the local distributor for change of the storage batteries.
The Manufacturer (trader) does not bear any responsibility if you use the device in violation of
the law, on archeological or forbidden for search places as well as on private property without
the knowledge or the permission of the owner.
Protect the environment and always fill back in the holes you have dugged out!
9. GUARANTEE
The detector Delta4 is offered with 2 years of guarantee of electronics, labor
and materials used, for harms which are not caused on purpose or irresponsibly.
We can upkeep your device after period of guarantee if it is necessary.
10. Protecting your investment
Often detectorists are disappointed when their new detector slowly becomes
less and less responsive and seems to have lost some of its original peak
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performance. You can help avoid this from happening to your detector by
following these basic care and protection guidelines:
Operate your detector exactly as recommended in this Operator Instruction
Manual.
The search coil cable is hard-wired to the search coil and protected by a
strain relief. It is very important that the strain relief remains intact and should
never be adjusted or tampered with.
Keep cables properly wound around the pole stems and protect them during
use. Floppy, pinched, or cables that become snagged during use may short,
causing erratic noises or unnecessary replacement of the search coil.
Sweep the search coil carefully, especially when using around rocks and
building f oundations. Avoid hitting the search coil against hard, solid objects
and surfaces.
Keep your search coil slightly off of the ground during the sweep, especially
when using in gravel or hard, rocky dirt.
Remove and clean out scuff covers periodically to avoid buildup of
mineralized dirt particles which will affect performance.
The search coil is waterproof and can be submerged in either fresh or salt
water. After the search coil is used in salt water, rinse it and the lower stem
assembly well with fresh water to prevent corrosion of the metal parts.
The search coil is waterproof but the electronics are not, so always prevent
any moisture or water from entering the control housin g and never allow the
cable connector to become submerged in water.
If working in or near water, or if there is a possibility of rain, use a
protective weather resistant pouch or plastic bag to cov er the control housing.
Make sure it can "breathe" in order to ensure
against condensation buildup inside.
After each use, clean the detector with a soft cloth to remove dust, moisture,
or other contaminants.
When transporting the detector in a car during hot weather, store it on the
floor of the passenger compartment if possible. Using a carry bag gives
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additional prot ection. In any case, never allow the detector to roll around
unprotected in the trunk or back of a pickup truck.
Protect your detector from dust, moisture, and extreme temperatures during
storage.
Treat your detector as you would any sensitive electronic instrument. Though
ruggedly constructed and designed to withstand the demands of normal treasure
hunting, proper care is essential.
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