Simrad SC90, Installation Manual

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419050/B
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d Repeat the inspection of the transducer cables when the SC90 is turned on and
put to operational use.
6 Make sure that the unit is firmly connected to vessel ground.
a Make sure that the unit is securely connected to the vessel ground with an
earthing strap. The strap must be in addition to any incidental electrical contact
made by the mounting lugs on the unit.
b Use a standard multimeter to check that the resistance between the unit and the
ship's ground is approximately 0 (zero) Ω.
7 Make sure that there are no corrosive attacks on the hull unit, mounting flange,
installation trunk, support brackets or other parts of the installation.
Result
Requirements
Results
The hull unit is correctly installed with easy access for maintenance and
replacement of parts.
The compartment in which the hull unit is installed ("sonar room") is clean
and dry.
All cables are properly mounted with enough slack.
The transducer cables can move freely when the transducer is lowered
and hoisted.
The welds and mechanical brackets that support the gantry are strong
enough to hold the hull unit securely in place under all operating conditions.
The welds and brackets have been painted with the correct preservation
medium to prevent corrosion.
There are no corrosive attacks.
Date and signature:
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.
Setting to work