Eddyfi Technologies TSC U41, User Manual

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The Subsea Bottle
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Probes
Three probe connectors are fitted to the U41. These are wet-mateable subsea connectors which
are designed to be made and broken in wet conditions topside. They should not be disconnected
subsea.
Only SENSU2 UW probes from Eddyfi are compatible with the probe connectors and no other
connection should be made as damage to the instrument may occur.
Probe connection
Each Sensu2 UW probe is terminated in a subsea connector which can be attached to any one
of three probe input connectors on the U41 subsea bottle. To create a connection:
1.
Orientate the probe plug with the bottle connector using the missing pins as a guide.
2. Gently insert the plug into the bottle socket and, when sure the pins are aligned correctly,
push firmly down to mate the two flat surfaces of the connectors together.
3.
Screw down the probe locking collar completely.
If the plug is difficult to insert, check for bent pins then lubricate the rubber parts with a light
spray of silicon oil.
If any probe connector does not have a probe attached, a blanking plug must be fitted to avoid
potential damage to the connector or unit.
Maintenance of the subsea bottle
Connectors
1.
Clean the subsea unit with fresh water after each dive while probe and umbilical are still
connected.
2.
Always keep connectors on probes covered when not in use to avoid contamination - do
not allow to 'dry out' by long exposure to heat and sunshine.
3. After ensuring connectors are dry, fit blanking plugs to all unused bottle, umbilical and
probe connectors
4.
Lightly lubricate the connector pins with silicon spray on the rubber part only.
5.
Check cleanliness of contacts.
6.
Use warm soapy water with cotton buds to clean female connectors.
7. Before each dive, visually check the connectors, particularly with regard to splits or
mechanical damage.
8.
The probe cable between the small electronics bottle and the subsea unit must not be
changed in the field because the connectors will be damaged by water ingress.
Instrument and Cables
1.
The subsea instrument and probes are rated to 350m water depth (except deep-water
ROV version, which is rated to 2000m).
2.
Avoid bending the connectors where they are attached to the subsea unit.
3.
Never use the umbilical to lift the unit. A separate lift line must be used attached to the
loop on top of the stainless steel handle. It is recommended that “Chinese fingers” or
similar strain relief be applied between the umbilical and the handle prior to deployment.
Fix the umbilical to the handle in such a way that no abrasion damage can occur and
also to provide strain relief. If two 150m umbilical cables are connected together to make
300m, or 3 are connected together to make 450m, ensure that the connection is not
strained by tying a rope between the two cables across the connection to take any strain.
4. Never put strain on the probe or connectors. Always use rope to tie the probe to the
cage to provide strain release in case of accidental tension being applied to the cables.
This also allows more than one probe to be carried on the unit. Ensure that all probe
cables are coiled up and tied to the cage during deployment/recovery of the subsea unit
to minimise the chances of accidental damage through collisions with the structure.
5.
If the umbilical is damaged, do not use the system.