Installation manual

Transducer installation

851-165187 / Rev.A

Box keel

Vessels with a box keel may use this for transducer installation.

The box keel is already the deepest part of the vessel. If the box

keel is too narrow to accommodate the transducer, it can be

widened, either symmetrically or to one side only. In the last

case the installation could also be described as a blister m erged

into the keel.

Mounting and clamping rings

Circular transducers may be provided with mounting a nd

clamping rings, or with drawings to allow for local production

of these. The mounting ring is welded to the hole in the box

keel, while the clamping ring f its around the edge of the

transducer body. Bolts through the clamping ring into the

mounting ring will then secure the t ransducer between them.

Note that several transducers use direction guides to allow

correct mounting.

Inclination of the transducer face

If possible, incline the transducer face approximately 1-2

degrees, so t hat the flowing water meets it directly. This assures

laminar water flow.

Smooth surface

Mounting screws or bolts must not be extruding from the box

keel. Ensure t hat the surface of the transducer face, the box, the

hull plating and putty around the transducer is as even and

smooth as possible. Obstructions on these surfaces will create

problems with turbulant flow.

Horizontal support bar

Large diameter transducers must be fitted with a horizontal

support bar. This bar can be secured to the mounting ring using

threaded rods.