Detech EDS plus II, Instruction Manual

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MANUAL MODE OF OPERATION
adjust control the threshold tone won’t change while lowering the coil to the
ground. At this point the detector is balanced for the area and ready to hunt. If
you rotate the
GND adjust control further clockwise, you’ll pass this point of
balance. Then the detector will get quiet while lowering the coil to the grounds
surface, and it will increase the threshold tone when raising the coil. This
means that you should return the
GND adjust control slightly
counterclockwise until you get a constant threshold hum while pumping the
coil. Lets note, that from the sinking into the panel the clockwise rotating of the
GND adjust control in continuation of 11 turns there will be a change in the
ground balance. If you continue to rotate the knob after these 11 turns you
won’t get any more change in the balance. If you are confused for some
reason, press again the
GND adjust control, this will return you to the initial
point, and you could start the procedure again.
When you ground balance on very heavy grounds it is possible to have
cases when you hear increasing tone while lowering, and while raising your
coil. If this increased tone is with one and the same volume you have a correct
ground balance adjustment. This is a normal affect for the very heavy
grounds. To decrease this unpleasant affect you could decrease the
sensitivity level of the detector.
Remember that the coil must be lifted straight off the ground. Swinging
the coil in an arc will cause false readings and will result in not proper ground
balance.
If the all metal/disc . control is in all metal , and the switch A ground/M
ground to A ground position the detector won’t operate correctly and while
nearing the coil to the ground surface you’ll hear increasing threshold tone.
The affect of the hole
When you operate the detector on heavy and wet soils conditions,
especially when you use the bigger sized coil while passing over an open hole
you’ll hear audio signal from the detector, even if in the hole there is no any
metal object. To avoid this unpleasant effect while sweeping the coil over the
hole rotate the sens. control counterclockwise. If even with minimum
sensitivity level the affect of the coil does not disappear you should turn the
detector in Auto mode of operation (page 4).
If you have made a good adjustment of the ground balance for certain
ground, and it is rich of hot rocks, these hot rocks will give a quite specific
negative response. The sound they give is quite special, but with some
practice you’ll be able to recognize exactly the signals coming from such hot
rocks.
While operating on normal grounds some very experienced professional
TH-ers, in order to increase the sensitivity and depth of penetration,
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