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TRANSDUCER ANTI-FOULING
Following installation the water exposed face of the
transducer may he painted with one thin coat of hard
Antifouling. carefully applied so that the paint does
not form or trap air bubbles. Care should be taken
not to damage the transducer face or the piezo
electric crystal that it protects. Accidental damage to
this scaled unit cannot he repaired.
WITHIN HULL (GRP) TRANSDUCER
INSTALLATION (Optional)
As an alternative to mounting the transducer
through the hull with the face in direct contact with
the
water. it
may be positioned inside a glass-fibre
htill by means of an In Hull Transducer Kit as shown
i
n Fig. 2. The In Hull Transducer Kit is available
from most Chandlers and Boatyards, as an optional
extra. The end cap of the In Hull Transducer Kit is
provided with a push-out insert making it suitable for
the stem diameter of both the Seafarer 5 and 700
transducers. This method of installation has the dual
advantage that no hole is made in the vessel's hull
and that the echo sounder and transducer can easily
be removed for examination or installation
elsewhere. It should he mentioned however, that
although the accuracy will in no way he affected by
i
nstalling the transducer inside the hull, the
maximum range sensitivity may be reduced
depending upon the thickness and quality of the
lass-fibre.
We do not recommend this method of
installation if the thickness of the glass-fibre exceeds
three-quarters of an inch. Neither do we recommend
its use in hulls of wood, steel or aluminium, although
this method of installation has been found acceptable
with these materials in some cases. Full installation
details are supplied with the In Hull Transducer Kit
and copies are available on request to Seafarer
Navigation International Limited.
INSTRUMENT INSTALLATION
WARNING: The location of the instrument should
he at least 2 feet (61 ems) from a magnetic compass.
Repeat meter 1 foot (30 ems).
With the bracket provided the instrument may be
mounted in any position, as the bracket can be
rotated through 360°. (The bracket is designed to he
slightly undersized to ensure a good grip on the
case). This means that it can be facing down from a
cabin roof, or on top of an instrument panel or
console, or side mounted by the chart table. If the
i
nstrument is mounted outside or in a cockpit. a
sheltered position should be chosen, since although
the instrument is water resistant it is not fully
waterproof. For this reason it is advisable to provide
a cover or some additional protection against
extreme climatic conditions.
5
FLUSH MOUNTING
An alternative method of mounting is to fully recess
the instrument into a panel or bulkhead using a flush
mounting flange. The template provided with the
operating booklet may he used for making the
appropriate cutout in the bulkhead. Remove the two
plastic side mounting knobs and cut the projecting
screw threads back to the metal flange on each side of
the instrument case. Fit the plastic mounting bezel to
the instrument by slacking the four fixing screws at
the rear of the case sufficient to allow the bezel
(
which is in two halves) to be slipped in between the
front panel and the case. Re-tighten the four screws
trapping the bezel in position. The instrument can
now be pushed into the cutout in the bulkhead from
the front and secured with eight countersunk screws
in the bezel. The outline dimensions of the Seafarer 5
for mounting purposes are shown in Fig. 3.
POWER SUPPLY
The instrument may be powered by either an internal
battery or ship's supply of nominal 12/24 or 32 volts
D.C. without adjustment. The rear battery
compartment cover must be removed to allow access
to the connections. If the instrument is to be powered
from the ship's supply, attention is drawn to the fact
that the internal battery terminals MUST remain
stowed in their stowage position. The unit will not
operate on an external supply unless the battery
terminals are in the stowage position.
Internal Batteries. The recommended battery is
the
Ever Ready PP9 or Vidor VT9 or its
i
nternational equivalent:
Beret PP9
Diamon 339
Ever Ready 276
Petrix 439
Mazda RO 617
Superpila 995
Tudor9Tl
Remove the battery clips (red and black leads)
from their stowage position and clip them on to the
batter in the correct polarity. Red to positive
(
+VE)and black to negative (-V E).
As an alternative two 4.5 volt flat flashlight
batteries of the type with two brass contact strips at
the top may be used with an appropriate adaptor.
During the Season, periodically check the battery or
batteries for signs of corrosion and always remove
t
hem at the end of the Season. Should the instrument
ever need servicing, remove the battery before
posting.
Ships Supply.
The instrument will accept any
nominal ships supply of 12, 24 or 32 volts D.C.
without adjustment. Damage, however, will he
sustained if a higher voltage is connected or if the
ships supply produces "peaks" in excess of 35 volts.
To connect the instrument, remove the battery
compartment cover and make a small hole in the
sealing grommet marked "external supply" in the
back cover. Thread the power supply cables through
5


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