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350 Cable Survey System
DPN 402197 © TSS (International) Ltd Page 4 of 18
These grounding provisions hold the 350 System at the same electrical potential as
the sea water. This prevents the occurrence of electrochemical action between the
System and the sea water and minimises galvanic corrosion.
4.1.2 Care of Sub-sea Connectors
To ensure reliable operation and to extend the life of the sub-sea installation, take the
following precautions to care for the sub-sea connectors used throughout the 350
System:
1. Keep both the connector and socket free from debris and salt build up.
2. Use soap and clean fresh water to wash the connectors, and then rinse them with
isopropyl alcohol (IPA). Allow the connectors to dry thoroughly in air before you
reassemble them.
Lubricate the mating face of the connectors with a very light spray of 3M Silicone Oil
or Dow Corning #111 valve lubricant or equivalent. Do not use grease.
CAUTION
Some silicone lubricants will crystallise when you subject them to sea water under
pressure. When this happens, the seals of the connector will degrade and allow water
to penetrate.
To avoid damage to the connectors, use only the lubricant oils mentioned above, or
equivalent oils that the manufacturer approves specifically for use on deep-sea con-
nectors and seals. When you apply the lubricant oil, use a very thin coating only.
4.1.3 Sub-sea Electronics Pod
The SEP performs all the following functions:
Supplying power for the sub-sea installation
Signal processing
Calculating the target co-ordinates
Communicating with a sub-sea altimeter connected directly to the SEP
Communicating with the SDC through the ROV umbilical
Interfacing with the TSS 440 Pipe and Cable Survey Systems (when you use the
350 System within a Dualtrack installation).
The SEP has six ports that allow connection to the various sub-sea components of
the installation.
On one end cap:
Port coil triad connection
Starboard coil triad connection
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