Simrad SP270 Installationshandbuch PDF herunterladen (Seite 22)

Simrad SP270

851-160571 / B

Installation requirements

Responsibility and approval

The Simrad SP270’s Hull Unit sleeve has been approved by Det

Norske Veritas (DNV) Classification society.

Individual Hull Unit installations must be approved on a

case-by-case basis with regard to the vessel’s national registry

and corresponding maritime authority. The shipowner and

shipyard performing the installation are responsible for

obtaining installation approval.

Supply power

The supply voltage to the equipment is to be kept within ±10%

of the installation’s nominal voltage. Maximum transient

voltage variations on the main switchboard’s bus-bars are not to

exceed -15% to +20% of the nominal voltage (except under

fault conditions).

Simrad strongly recommends that the SP270 sonar be powered

using an Uninterruptible Power Supply (UPS). The UPS should

have the capacity to independently maintain power to the sonar

for a minimum of 10 minutes. This ensures that the system can

be switched off in a controlled manner in the event of a power

failure.

Environmental requirements

Temperature and humidity

All equipment, unless otherwise specified, must be protected

from temperature extremes and excessive humidity.

Compass deviation

Once the installation is complete, the vessel must be swung with

the sonar in both the operative and inoperative modes. The

shipowner and captain are responsible for updating the deviation

table accordingly with regard to the vessel’s national registry

and corresponding maritime authority.

Noise sources

The vessel’s hull, rudder(s) and propeller(s) should 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. It is especially important that the propeller(s) is not

pitted or damaged.

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Simrad SP270 Installationshandbuch Seite 22