REX Delta 4 User's Operating Manual

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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