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SEAFARER 3 - 4 Seite 2

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name "Osmaweld").
(2)
Quantity 1, socket Z.104 12" I /D. (Made by Osma Plastics under the trade name
"Osmaweld").
(3)
Quantity 1, socket plug Z.296 1;" 1/D. (Made by Osma Plastics under the trade name
"Osmaweld").
(4)
Quantity 1, tube of polystyrene cement. (As used in the construction of model kits).
(5)
Quantity 1, -} pint castor oil.
(6)
Quantity 1, medium size glassfibre repair kit (obtainable from garages or chandlers).
Method of installation.
(1)
with the boat in 20-30 feet of water, determine a position from inside the hull, ideally
slightly aft of amidships, where the Seafarer gives a reading of the correct depth with the
transducer face pushed hard against the inside of the hull and the gain control turned to
maximum (it will be necessary to wet the face of the transducer with water during this
test to provide a good interface between the transducer and the hull).
The transducer
should be as near vertical as possible during this test.
Operate the engine(s) during the test to see that there is no electrical interference, keeping
the co-axial transducer cable away from the engine(s). If minimal or no interference is
recorded by the Seafarer, mark the chosen transducer position inside the hull after making
sure that it is free of water, grease and oil.
(2)
Cut the 12" 1/D tube to about 4" long.
Again cut the tube, without decreasing the
overall length of 4", to such an angle that it matches the inside curvature of the hull when
positioned vertically.
(3)
Lightly sand the inside surface of part Z.104 and the outside surface of square cut end
of the tube where they will join.
Apply a little polystyrene cement to both surfaces and
fix together.
(4)
Roughen with sandpaper around the outside of the tube at the end that has been cut to an
angle, approximately 12" up from the base. Place the angled end of the tube into the
chosen position inside the hull.
(5)
Carefully mix the glassfibre repair kit to the makers instructions, taking particular note
of the curing temperature requirements.
Spread the mix around the base of the tube
where it meets the hull, taking care that none of the mix spreads to the inside of the tube.
Build up the mix to If" around the base of the tube so that the tube will be held
securely in place when the curing process is complete.
Keep the tube firmly in position
during the curing process taking care not to "rock" it from side to side, thus making a
potential source of leak when the oil is added.
(6)
Drill a 17/32nd" hole in the centre of socket plug (housing cap) Z.296 and a small pilot
hole ;" from the cap periphery to accept a small self-tapping screw.
(7)
Remove the top nut from the threaded transducer stem and take it over the plug at the
end of the co-axial cable.
Leave the second nut in a position approximately half-way
down the transducer stem.
Thread the co-axial plug and lead through the hole in the
housing cap.
Push the transducer into the housing that is attached to the hull so that
the transducer face touches the hull.
Lightly push the socket cap into position onto the
housing.
(8)
Pass the transducer co-axial plug and cable
through the nut previously removed and
TRANSDUCER STEM
thread the nut down the stem until it touch-
-
TRANSDUCER CABLE
es the housing cap (Do
not
tighten down).
Remove the transducer and cap from the
y
"
housing and tighten the inner nut on the
92 OIA. HOLE
SELF TAPPING SCREW
stem up to the inside of the cap, gripping it
,
i
securely.
SOCKET 2.104
SOCKET PLUG T296
(9)
Half fill the housing with the castor oil,
making sure there are no leaks from the
moulding that joins the housing to the
CASTOR Bit LEVEL `
CEMENT JOINED
hull.
Push the transducer slowly into the
SUOACEG
housing, so that the cap fits securely onto
it.
Screw in the self-tapping screw into
TUBE 2.74-'
'
GLASSFIBRE
the pilot hole in the cap,
HULL
Push the co-axial transducer plug firmly
GLASSFIBRE
into the hack of the instrument.
The
mix
==
WATER
_
--
=
-
TRANSDUCER FACE
system is now ready for use.
V
Notes: (a) By adopting the above method of in hull echo sounding, the pattern of sound
emitted by the transducer remains at approximately 45
°
in a conical shape. If
the transducer and its housing are installed vertically therefore, depth indication
will he given up to a heel angle of 221' (dependant on the thickness of hull
material).
2

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  • Gibt es diese Anleitung auch in Deutsch ? Ich weiß nichts mit oberen Knopf 1x. 6x an zu fangen Eingereicht am 8-7-2018 12:11

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