The transducer section of the manual begins with a general discussion of
transducer installation considerations for locating transducers on the ves-
sel. Detailed mounting instructions for the
2528L
transducer and the
2528B
follows this section.
-
The transducer element is that portion
of a sounder system that converts the elec-
tricalpulse from the sounder into a sound
wave which is transmitted downward to
the bottom and returned as an echo. This
echo is picked up by the transducer and
sent to the sounder which, through time
comparison, converts the difference for
display on your
V8010.
The transducer, the heart of the Fishfin-
der, is a delicate instrument and although
it is designed to survive in the toughest
marine environment it should not be
TRANSDUCER
ENERGY WAVE
dropped or manhandled during installation.
The transducer element assemblies are constructed into either molded
resin or bronze caste housings and covered with an epoxy window surface.
The epoxy “window” is the surface through which ultrasonic pulses must
travel. This epoxy surface must be kept as clean and smooth as possible so
the ultrasonic energy path is uninterrupted. Caution is advised when han-
dling the transducer to prevent any damage to the transducer face.
Also, when handling the transducer, avoid lifting or pulling on the
transducer by the cable. Although the cable appears thick and substantial,
the internal cable wiring could become damaged due to stress by the sheer
weight
ofthe
transducerunit and malfunctionat the most inopportune time.
252 General Mounting Considerations
In any transducer installation acoustic noise is always present. The noise
is usually a combination of “ambient” as well as “vessel generated” levels.
Ambient noise is often generated by waves and air bubbles, fish and mam-
mals, ram and hail on the surface, other nearby vessels or shore noises.
Sources of vessel generated noise include: propellers
&
propeller shaft
vibrations, machinery, main engines, generators
&
pumps, flow of water
INSTALLATION 21
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