Use Mounting And Clamping Rings Whenever Provided; Smooth Surface Is Important; Example: Mounting Inside The Hull - Simrad 38-200 COMBI W - INSTALLATION REV D Installation Manual

Figure 9 Mounting inside the hull
A Steel tank
B Oil
Hull plating
C
D Cable service
loop
Stuffing tube
E
Cable in steel
F
conduit
G Hole for oil
filling
Air outlet
H
164986/D
Use mounting and clamping rings
whenever provided
Circular transducers may be provided with mounting and
clamping rings, or with drawings to allow for local production
of these. The mounting ring is welded to the hole prepared for
the transducer, while the clamping ring fits around the edge of
the transducer body. Bolts through the clamping ring into the
mounting ring will secure the transducer between them. Note
that several transducers use direction guides to allow correct
mounting.

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.

Example: Mounting inside the hull

The transducer shown in the figure below is mounted inside the
hull. The tank is filled with oil.
How to install the transducer
19