Kongsberg EM 122, Руководство по установке

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EM 122
Steel conduits
The transducer cables connect through the vessel’s hull using steel conduits welded to the
hull. The top of each conduit must be closed and sealed to preserve the watertightness.
This can be done with a “Bratberger”, “Roxtec” or a similar sort of sealing device.
The installation of the steel conduits must be properly planned, and all plans and
drawings must be approved by the vessel’s classification authority.
For the principles, see EM 122 blister and steel pipe arrangements (example) on page 25
The steel conduits must be designed to fit each individual vessel. They are not included
with the system delivery. The steel conduits must therefore be both provided (or
manufactured) and installed by the installation shipyard. The number of steel conduits
depends on the chosen system configuration and the internal diameter of the conduits.
• a 0.5° x 1° system (96 TX modules and 16 RX modules) requires four TX conduits
and one RX conduit.
• a 1° x 1° system (48 TX modules and 16 RX modules) requires two TX conduits
and one RX conduit.
• a 1° x 2° system (48 TX modules and 8 RX modules) requires two TX conduits
and one RX conduit.
• a 2° x 2° system (24 TX modules and 8 RX modules) requires one TX conduit and
one RX conduit.
• a 2° x 4° system (24 TX modules and 4 RX modules) requires one common TX
and RX conduit.
Logistics and references
Safety - Refer to the general safety procedures.
Qualifications
- Mechanical workers
Ship location
- Dry dock
Special tools
- None
Drawings Drawing file on page 109
Procedure
How to mount the steel conduits
1 Design the steel conduits with appropriate length and diameter to fit the echo
sounder.
2
Mount the steel conduits from the vessel hull and up towards the sonar room and
the EM 122 Transceiver Unit.
• The RX steel conduit(s) should have an inner diameter of minimum 146 mm.
• The TX steel conduit(s) should have an inner diameter of minimum 197.0 mm.
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