Smooth Surface Is Important; Using A Suitable Inclination Angle - Simrad ES120-7C Installation Manual

Split-beam transducer

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Simrad ES120-7C Installation Manual

Smooth surface is important

Make sure that the surface of the transducer face, as well as the plating and putty around

the transducer is as even and smooth as possible. Obstructions on these surfaces will create

problems with turbulent flow, and may cause noise.

Mounting screws or bolts must not be extruding from the transducer or the plating

immediately around it. Obstructions on these surfaces will create problems with turbulent

flow, and may cause noise.

The space around the threaded rods (or mounting bolts) must be filled with a a suitable

filling compound (putty) and/or a locking ring. This is important to secure a firm installation

and a level and smooth surface.

Note

Obstructions on these surfaces will create problems with turbulent flow, and may cause noise.

Ideally, the transducer face should be mounted in parallel with the sea surface when the

vessel is in normal trim, as this will provide the most accurate echo information. However, it

is also very important that the water flow over the transducer face is laminar.

In order to ensure laminar flow, the transducer

face must be tilted slightly upwards in relation

to the water flow. This allows the flowing

water to meet the face directly, and reduces

laminar noise.

The inclination angle must be determined

carefully. The angle must be small on

transducers with a narrow beam angles. As a rule of thumb, mount transducers with beam

angles smaller than seven degrees with 1 ° inclination angle. The smaller beam angle your

transducer has, the smaller the inclination angle can be.

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