Simrad SC90, Installation Manual

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419050/B
45
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Output voltage
: 230 VAC, 50 Hz
•
Output power
:
– Processor Unit and display: 1000 W
– Transceiver Unit: 1500 W
•
Output form
: The output AC voltage must be a sine wave
Cables and wiring requirements
Correct wiring is crucial for the operational performance of the SC90.
All cables running between system cabinets located in different rooms and/or on different
decks must be supported and protected along their entire lengths using conduits and/or
cable trays. Note that the cables must not be installed in the vicinity of high-power
supplies and cables, antenna cables or other possible sources of interference.
For more detailed information about cables and wiring, refer to the basic cable
requirements.
Compass deviation requirements
SC90 units that are installed on the bridge may have an effect on the compass.
Once the installation is complete, the vessel must be swung with the SC90 in both
operative and inoperative modes.
The shipowner and captain are responsible for updating the compass deviation table
accordingly with regard to the vessel’s national registry and corresponding maritime
authority.
Noise sources
The operational performance of the SC90 Fish finding sonar depends on the noise
conditions. It is essential that the noise signature is as low as possible.
The vessel’s hull, rudder(s) and propeller(s) must be thoroughly inspected in dry dock
prior to installation.
Roughness below the water-line deformities in the shell plating and protruding obstacles
can create underwater noise. These sources of turbulence must be smoothed or removed
as best as possible.
Note
It is especially important that the propeller(s) are not pitted or damaged.
Simrad SC90