Teledyne 440, System Manual, Page: 52 / 256

4 – Electrical Installation
4-6 © Teledyne TSS DPN 402196 Issue 4.1
stress, and ensure the cables are safe from potential damage from manipulators,
thrusters or other equipment on the ROV.
Before you assemble any electrical coupling in the sub-sea installation, inspect the pins and
receptacles of all connectors for signs of damage, contamination or corrosion. Follow the instructions
in
section 4.1.2 "Care of Sub-sea Connectors" on page 4-3 to clean and care for the connectors, and in
section 6.3.2.1 "Coil Insulation Test" on page 6-13 to perform an electrical insulation test on the coils.
Tighten the connector locking collars by hand only – do not overtighten these connectors .
For the System to operate correctly, you must connect the search-coils to their correct input channels
on the SEP. Labels identify the four SEP input channels:
❐ Connect the starboard coil to SEP Channel 1
❐ Connect the centre coil to SEP Channel 2
❐ Connect the port coil to SEP Channel 3
❐ Make certain you fit the supplied blanking plug to SEP Channel 4 to protect it from contact with
sea water.
NOTE
The above coil-to-channel relationship is valid both for front and for rear mounting
coil arrangements on the ROV.
4.1.6 Sub-sea Altimeter
CAUTION
If you do not use the ‘Altimeter’ port on the SEP, you must fit the correct blanking
plug supplied with the System to protect it from contact with sea water. Further
plugs can be obtained if required (Teledyne TSS P/N 202208).
If you do not fit this blanking plug, rapid corrosion of the port will occur and the port
will fail. Sea water will enter the SEP through the corroded port to cause total
failure of the SEP.
Depending on the type of altimeter used, you may connect the altimeter in one of two ways:
❐ Directly to the SEP (see section 4.1.6.1 "Direct Connection to the SEP" on page 4-7 )
❐ Through the ROV umbilical to the SDC (see section 4.1.6.2 "Connection to the SDC" on page
4-7 )