Simrad ES38-12 - REV C, Installation Manual, Page: 19 / 46

How to install the transducer
This can be accomplished by air release through a steel tube, which is extended either
to open air 1.5 m above the water line or to the water outside the hull at a point higher
than the tank interior.
If the tube is extended to open air, drainage must be provided with leakage at the
transducer flange or a separate hole in the tank bottom.
Example: Flush mounting in a steel tank
Figure 10 Flush mounting in a steel tank A Steel tank
B
Water
C Drainage hole
D Cable service loop
E Steel tube for air outlet
F
Stuffing tube
G Cable in steel conduit
The figure illustrates the
installation principles when the
transducer is mounted in a steel
tank.
Transducer with acoustic window
Vessels operating in arctic waters need special attention on transducer installation.
Floating blocks of ice may damage even a flush mounted transducer face. For this
situation Simrad offers arctic tanks in different sizes.
Use mounting plate whenever provided
Certain transducers may be provided with a mounting plate, or with drawings to allow
for local production of this.
The mounting plate is welded to the hole prepared for the transducer. Bolts through the
transducer body into the mounting plate will secure the transducer.
Smooth surface is important
Mounting screws or bolts must not be extruding from the transducer or the area
immediately around it.
Make sure that the surface of the transducer face, the installation hardware used to mount
it, the hull plating and the putty around the transducer is as even and smooth as possible.
Obstructions on these surfaces will create problems with turbulent flow.
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