Kongsberg EM 710, Installation Manual

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Kongsberg EM 710
9.2 Electrical checks
9.2.1 Scope
This section of the manual contains the test procedures for the
EM 710 system’s power and signal interface cables.
WARNING
These checks must be completed before any power
is switched onto the system.
9.2.2 Cabling
Visual cable inspection
Refer to the cable plans and interconnection diagrams, and
check all power and interconnection cables. Any locally fitted
plugs and connectors should also be checked to ensure that the
correct types have been used for the specific locations. (Sealed
or spark-proof connectors in areas where flammable gasses may
accumulate, etc.)
Ensure that all cable connections have been made according to the
cable plan, and that all connections are tight and secure. Ensure
that all cables are correctly laid in conduits, or are otherwise
protected according to the regulations and recommendations laid
down by the vessel’s registering authority. Ensure all protective
covers are fastened correctly.
Cable connections and continuity
After the cable connections have been completed and the
visual inspection has been carried out, all the cable cores must
be checked for correct connection and continuity. Refer to
the cable plans and interconnection diagrams, and check all
interconnection cables. Any locally fitted plugs and connectors
must be checked for shorts or open circuits. Ensure all cable
connections have been made according to the cable plan, and that
all connections are tight and secure.
The check procedure will require two engineers equipped with
two-way communication devices; one will require continuity test
equipment, while the other will require a suitable shorting strap.
Follow the check procedure below for each cable core
1 Position yourselves one at each end of the cable to be
checked. Good communications must be established
between you and your assistant.
2 Ensure that the cable to be tested is not connected to any
power source.
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