SEAFARER 3 - 4 Manual

SEAFARER Marine 3 - 4

Læs gratis den danske manual til SEAFARER 3 - 4 (4 sider) i kategorien Marine. Denne vejledning er vurderet som hjælpsom af 21 personer og har en gennemsnitlig bedømmelse på 4.5 stjerner ud af 11 anmeldelser. Har du et spørgsmål om SEAFARER 3 - 4, eller vil du spørge andre brugere om produktet?

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Side 1/4

SEAFARER 3 - 4

NSTALLATION AND OPERATING INSTRUCTIONS

TRANSDUCER INSTALLATION.

WARNING:-The co-axial cable is sealed into the stem

of the transducer and if damaged in any way cannot be reconnected.

Do not shorten or cut

the transducer lead (nominal length 24 feet or 7.3 metres) or extend it by means of co-axial

plugs or any other method.

Any excess cable should be coiled away from excessive heat and

interference from engines or generators.

Transducers with longer cable can be supplied to

special order.

For full depth performance the transducer stem should be mounted as near to 90' from the

horizontal as possible.

Install the transducer in a part of the hull which is as clear as. possible

from aerated or turbulent water and where accidental damage is unlikely to occur.

Normally

a position slightly aft of amidships is preferable.For fin-keel sailing boats it may be

preferable to fully recess the transducer into the stem so that the face is completely flush.

It should be remembered that the angle of sound wave radiation is 45' and so care should be

taken that a false echo is not created by one of the fin keels. If a single transducer is installed

on the centre line of a boat, depth readings will be obtained up to a heel angle of 22#°. If

two transducers are required, to avoid fin-keels for instance, then each should be fitted in

opposite bilges facing outward at an angle of approximately 15°.

By using an automatic

change-over switch, readily available from the manufactures, a twin transducer installation

will enable the Seafarer 3 to give accurate depth readings to heel angle of 37}°.

The following illustration indicates typical transducer installations using a wooden fairing

block outside the hull that has been carefully bored, carved and sanded to a streamline shape

thus avoiding the creation of turbulent water which may reduce or even prevent depth

ndication when under way. In one of the examples shown, an internal fairing block has been

used for strength, sealing and to allow for hull curvature.

The installation should he carefully

rendered watertight by using a sealing compound between all mating surfaces.

Do not over-

tighten the nuts on the transducer stem.

Do Not Shorten

Cable Length

Water Line

Stem Fitting



Bilge

Mounting

Not to

Scale



Transducer

Head

Embedded

Mastic

Sealing

Compound

Level Fitting to Avoid

Water Turbulence

1 d [lia.

---

mm.

The water exposed face of the transducer may be painted with one thin coat of hard racing

copper, carefully applied so that the paint does not form or trap air bubbles.

Take care not

to damage the transducer face or the lead zirconate crystal that it protects.

Accidental damage

to this sealed unit cannot be repaired.

Within hull transducer installation.

As an alternative to mounting the transducer with the face in direct contact with water, it

may be mounted within a glassfibre hull. If this method is chosen it must be accepted that

there will be some reduction in the depth reading capability of the instrument, dependant

upon the quality and thickness of the hull.

In the United Kingdom the following parts are readily available from Builders merchants,

Chandlers and model shops. (Alternatively a complete kit of parts, excluding the transducer,

may be obtained from Electronic Laboratories (Marine) Ltd. or from one of their stockists).

Parts required.

Note:

It is important that transducer housing tube be made from ABS material and not

Polypropylene or Polythene.

(1)

Quantity 1, tube type Z.74 If" 1 /D x Ift. long. (Made by Osma Plastics under the trade

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

housing and tighten the inner nut on the



92 OIA. HOLE



SELF TAPPING SCREW

stem up to the inside of the cap, gripping it



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.



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).

Produkt Specifikationer

Mærke:	SEAFARER
Kategori:	Marine
Model:	3 - 4

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