LEFT BLANK
OPERATION/CHECKOUT
- Position the coil outside and 5-6' away from any metal.
- Plug the cable from the underwater electronics board into the
control box.
- Connect power to the system.
- Turn the control box Power Switch on and note that the POWER
ON LED is illuminated.
- Turn the Sensitivity Switch to HI position.
- Turn the ZERO ADJUST knob until meter reads approximately .1.
- The system is ready to go. Periodic adjustment of the Zero Adjust
knob may be necessary.
DETECTING METAL
As metal passes below the lower Coil, the needle swings up. At
about a .2 meter reading the audio sounds off and increases in pitch
(frequency) as the needle swings higher. Maximum meter swing
occurs when the target is directly below the center of the Coil. As you
go past the target, the needle returns to .1 and the audio stops.
Run some tests out of the water with a metal target (gal can is fine)
to get the feel of the detection pattern. There is no need to move the
coil, simply move the target around (below) the coil set.
The upper coil is the noise cancellation coil. As metal is brought
above this coil it causes the meter to go down. If metal is brought
from the side of the coil set, the top coil cancels out the detection of
the bottom coil. This feature allows the coil set to be located near a
metal object with out detecting it. However, if the metal is too close
to the side of the coil it will reduce sensitivity to other targets. It is
when a metal object passes below the plane of the lower coil that the
target is detected.
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