Kongsberg EM 710, Installation Manual

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System test
• If a cable terminates in a plug at the unit, the test will be
more easily conducted if the plug is disconnected.
3 Select one pair of cable cores, and check that the cores are
connected to the correct terminals in the unit.
4 Connect your continuity tester to the two terminals in
question and check the continuity.
• If a low resistance exists between the two cores, this may
indicate the cores are connected to circuits or units with
low internal resistance. If this is the case, disconnect the
cores from the terminal block and test again.
• The resistance should be nearing ∞ ohms.
5 Tell your assistant to short the two cores together. Repeat
the previous test.
• The resistance should be 0 (zero) ohms.
6
Tell your assistant to remove the shorting strap.
• Check that the resistance reaches ∞ ohms again.
7 Check each core’s resistance to ground, and each core’s
resistance to all the other cores in the cable.
• All results should be close to ∞ ohms.
8 Assuming the test results are correct, the cores must
be reconnected to the terminal block (if they had been
removed), and the terminals checked to ensure they are tight.
9
On completion, move on to the next pair of cores and repeat
the tests until the entire cable has been checked.
9.2.3 Operational voltages
Check that the operational voltages on the equipment match the
power available on the vessel.
9.3 Final installation checks
After installation - but before un-docking - a number of
verification must be done to check that the mechanical end
electrical installation has been performed correctly.
Procedure
1 Check that the measured positions of the transducers, motion
sensor and positioning system antenna are reasonable by
comparing them with those estimated from the vessel
drawings.
2 Check that the measured installation angles of the
transducers is reasonable by comparing them with
measurements done with a simple inclinometer.
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