Simrad SC90, Installation Manual

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419050/B
Hull unit and transducer alignment
Irrespective of the physical hull unit orientation, the transducer shall not be mechanically
aligned.
Hull unit alignment is done in the SC90 software by rotating the echo presentation in the
display view. This is described in the
Setting to work chapter. The alignment is further
verified during customer acceptance testing.
Inspecting the transducer
While the vessel is still in dry dock, the transducer surface must be inspected for potential
damage that may have been inflicted during the installation.
Prerequisites
The vessel is in dry dock. Neither tools nor instruments are required. If you find damage,
you need a high resolution camera to document them.
Context
A Lower part of transducer shaft
B Transducer with its red protective coating
The transducer is covered with a thick red protective coating made of
a special plastic type. The red protective coating is an vital part of the
transducer. It is very important that neither this coating nor the internal
parts of the transducer are damaged during the handling, installation
or cleaning. Any holes and/or scratches in the transducer surface will
allow water to penetrate the transducer. If a leak occurs, the transducer
must be replaced.
Procedure
1 Lower the transducer using the hand crank.
a Locate the hand crank inside the Motor Control Unit.
b Remove the hand crank from its storage position.
c Remove the plastic plug on the top cover of the hull unit.
d Mount the hand crank onto the stub shaft through the hole in the top cover.
e Use the hand crank to lower the transducer.
Simrad SC90 Installation Manual