Kongsberg EM 122, Installation Manual

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EM 122
Installation requirements
Power supply
The supply voltage to the equipment is to be kept within the specifications given in the
chapter
Power requirements on page 61.
Kongsberg Maritime strongly recommends that the EM 122 Operator Station is powered
through an Uninterruptedly Power Supply (UPS). The UPS must be large enough
to allow minimum 10 minutes operation. The system can then be switched off in a
controlled manner in case of power failures.
Environmental requirements
Vibrations
The EM 122 Transceiver Unit and Preamplifier Unit are fitted with shock and vibration
damping mounts.
If the vibration velocity amplitude at the base of the installed equipment is expected to
exceed 1g in the range 5–50 Hz, constantly during operational life, special precautions
are to be taken.
Consult the applicable manufacturer's documentation for shock and vibration damping of
the EM 122 Operator Station and peripherals.
For more information about temperature and environment, see Environmental and EMC
specifications on page 62
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 acoustical 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.
Dry docking
The Transducer installation must be done when the vessel is in dry dock. Make sure
there is sufficient working space under the hull for this installation work.
Note
The location of the gondola and/or protection blister must be noted on the vessel’s
docking plan for future reference.
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