REX DELTA 6 Operation instructions

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REX TM Metal Detectors
DELTA 6
User’s operating manual
www.rexmetaldetectors.com

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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 Delta6 was shipped with these parts:
- Upper Pole Assembly –fully assembled, including upper pole stem with
handle grip
- Middle pole assembly with pole lock;
- lower pole - made of plastic in order to not disturb the work of the coil;
- 27cm DD search coil;
- electrical set box –made of extremely strong plastic;
- battery box including 10 AA batteries 1,2V/2500mAh;
- 220V automatic charger;
- Operation instruction manual.
Warranty card
If any of these items are missing, immediately inform us, or autorized dealer
where you purchased your detector.
CONTROLS: The Delta6 control panel:
- ―ON / VOLUME‖ –switches on the detector and adjust sound level
- ―SAT SPEED‖ (Self Adjustment Threshold Speed) –the speed at which the
THRESHOLD "faint hum" recovers from the affects of inconsistencies in
ground mineralization.

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- ―DISCR‖ –regulates degree of elimination of iron objects. User can adjust
the controller to reject undesired metal.
- ―THRESHOLD‖ –used for adjusting sound hum level and regulates depth of.
Rotate the controller counter-clockwise to low position to avoid interference.
Clockwise rotate the controller to have high sensitivity.
- ―Battery low‖ –blinking red light indicator. Indicates lower tension of
batteries. When the battery voltage is below 11.0V, ―Battery low‖indicator
will light. At this time user has to charge the battery.
- Jack ―Phones‖ –used for head phones
1. Assembling of the device:
Assembling the Delta6 is simple and you don’t need any spe cial tools.
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. Don't over-tighten the plastic bolt and nut. 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 from breakdown or short circuit.
Finally adjust search coil angle to your preference and you are ready.
The searching coil is approached to the surface of earth by paying attention to
avoid presence of metals within its range.
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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2. Quick start:
With the Delta6 properly assembled and the batteries charged, follow the
instructions below to start finding treasures!
2.1. Set the DISC control to position ―FOIL‖ (between bottle cap and
small ring).
2.2. Set the ―SAT SPEED”control to position “6”
2.3. Turn the ― ON / VOLUME‖ knob to ― ON‖ and adjust preferences
volume of sound.
2.4. Adjust the THRESHOLD control until you hear a soft threshold
"hum" (faint sound).
2.5. Lower the search coil to the ground and Fast Auto Track will
automatically balance or track out the ground mineralization.
Start swinging the search coil in wide sweeps that overlap each other as near
the ground surface as possible.
If you experience false signals or constant beeping or popping and you are not
near common sources of electrical interference, reduce THRESHOLD
(counterclockwise) slightly and try again. Also, you may increase SAT to high
position.
3. Fine settings:
3.2. Setting the ―THRESHOLD”
The ―THRESHOLD‖control sets the loudness of the background "hum"
or edge of sound. This background "hum" should normally be maintained during
searching. In order to hear the tiniest and deepest targets the THRESHOLD
"hum" should be set at the faintest audible level. It can be slightly scratchy,
chatter or static like but it must be constant so as to not miss that small or deep
targets.
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 light ―buzz‖ adjustment is recommended to insure
optimum depth and maximum performance.

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As ―THRESHOLD‖ is in low p osi tion, as low is sensitivit y. Too low of a
threshold setting may cause very weak signals to not be heard. Too high of a
threshold setting may cause operating instability.
NOTE: When searching in highly mineralized area, the unit will sound even if
there’s no metal. In this case, you can set the ―THRESHOLD―to low position,
increase the height between the search coil and the ground until the false signal
disappears. The ground conditions are really bad with mineralized ground, hot
rocks and iron trash, so your sweep speed must be reduced for best results. The
best result you will get if searching when the soil is dry.
Also, if there are interference from other instruments or electrical cable or TV
or radio in your searching area, lower the THRESHOLD, or to change the
current searching area.
3.3 Setting the ―SAT SPEED‖.
Delta6not need to be manual adjusted to ignore the effects of the ground
surface or ground mineralization. When you plunge the search coil into ground
surface it will take a second for the SAT to stabilize the detector. If you lift the
coil out of the ground you will hear a brief tone. This is normal function of the
SAT system.
Once the threshold tone has been adjusted, the SAT system will maintain it. If
you stop the loop over a metal target, the SAT will tune it out and return the
detector to threshold. If you move off the target, then back on, the detector will
retune giving a response. For this reason, the loop must be kept in motion while
detecting or pinpointing a target.
The sweep speed affects the performance capability of the detector. If you
sweep too slowly, the SAT will attempt to tune out a detected target. The result
will be a loss in depth. If you sweep too quickly, the detector may not response
to a detected target also resulting in a loss in depth. The optimum sweep speed
is there to one meter per second.
The Auto Track function compensates for common ground minerals in the
search area. The SAT control compensates for the inconsistency of the ground
mineralization. The greater the degree of inconsistencies, the more SAT is

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needed to quiet ground noise. If the SAT is too low, you can lose the threshold
―hum‖. If the THRESHOLD becomes too erratic or noisy, it might be necessary
to use the SAT feature and/or reduce the threshold control. This noisy behavior
will make it difficult to recognize a true target from pieces of mineral,
commonly referred to as "hot rocks". It is not wise to keep a high level of
THRESHOLD if the detector will not operate smoothly. This is a false sense of
security. Maintain as smooth a threshold as you can.
Fig.1
Delta6 working in dynamic regime - searching metal objects is made by moving
search coil toward ground surface –fig.1, fig.2
Wrong Correct
Fig.2
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. “DISCR” is used to eliminate any target that you do not want the
detector to audibly respond to.
Position ―FOIL‖ (between bottle cap and small ring) is recommended for most
general purpose searching. In this position, the detector will provide a reject
response to most iron and respond to most valuables including jewelry.

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If you need to eliminate foil over the ground, the “DISCR” control must be set
in a position over rings. Positions rings will reject more trash metals including
aluminum pull tabs.
In coins position nickels and some gold jewelry will be rejected.
If you come upon non-ferrous metals /gold, silver, copper, bronze/ a sound can
be heard; and if you come upon ferrous metal, you will not hear any sound, or
there may be a slight pop. If the “DISCR” control is in ―Nail‖ position, ever y
ferrous object will be signalized with sound (like non –ferrous).
If the soil is too mineralized we recommend the ― Bottle cap‖ position.
4. Pinpointing a Target
A good method for pinpointing is "X-ing" the target with the search coil. Push
and hold button ―Pinpoint‖, this mode makes it much easier to sweep the search
coil slowly and center directly above the target. Use loudest tone, to indicate
targets exact center. To "X" a target, sweep the search coil over the target from
side to side and nothing the side to side center. Then turn 90 degrees and sweep
the coil side to side noting the center from this new direction. "X" marks the
spot that you need to dig. You can practice with a coin on top of the ground to
become acquainted with this technique. 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.
Another easy method 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 one spot. The target will be directly below the coil center at this
response time –fig.3

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fig.3
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 utensil, 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.
To reduce false signals when searching in a very trashy ground, scan only a
small area at a time using slow, short overlapping sweeps.
Keep the searching coil moving at a comfortable rate. If you walk too fast, you
can’t overlap yours sweeps and you will miss a lot of ground. Also if you sweep
too fast, you will lose sensitivity and miss the deep targets

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6. Using a headphone
You should always use a headphone whenever you search with your metal
detector. Headphone is especially useful in noisy area, such us the beach and
rear city area. It enhances audio perception by bringing the sound directly to
your to your ears while masking ―outside‖ noise int erferences. You shell 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.
With headphones you will be able to work with a lower Threshold,
hear faint target signals, avoid bothering others with a "beeping" box, and save
on battery life.
To connect a headphone to the detector, insert the headphone jack into the
―Phones‖ on the front panel.
NOTE: The detector internal speaker will be disconnected when you
connect a headphone.
7. Charging storage batteries and indications for their status.
If a light ―Low battery‖ appears while using the detect or that means you
have to stop using it and recharge the batteries as follows: put the jack of the
charge device into ―CHARGE‖ nest and place the 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 middle terminal is ― +‖.
Charging depend on the level of discharge of the batteries. It’s not necess ary to
keep eyes on charge device, because it is supplied with automatic turn off and
batteries couldn’t be damaged no matter how long they will stay in the charge
device. The charging continues till the moment when the batteries reach their
maximum capacity. When reach 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 of the ―CHARGE‖

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NOTE: Don’t unplug the charger if c harge process is not finished.
Always charge device's storage batteries ONLY with the paired chargers to
it. Thus y ou w ill prevent damages or confusion betw een “+” and “ -” because
the use of other chargers or adaptors, may lead to irretrievable damages in
the batteries!
8. Possible problems during exploitation of Delta6:
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 local distributor.
-the accumulator block consists of 10 elements 1,2V / 2500mAh connected in
series. If just one of them is damaged the 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 interruptions.
- problems with the aerial cable –disconnected conductor, a shot circuit or bad
connection in the coupling.
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 the jack
which will improve the contact between them. It is possible in the presence of