Operation Manual

ULTRASONIC SPEED SENSOR

1.9.3 Attaching the safety wire

Plastic housing – Attach the wire to one eye of the hull nut. Twist the wire in a

anti-clockwise direction and thread it through one of the eyes in the cap nut,

then through the pull ring and the other eye of the cap nut, and finally through

the opposite eye of the hull nut. Twist the wire onto itself to lock the assembly.

Bronze housing – Wrap one end of the locking wire around the housing and

twist it together. Thread the other end up through the eyehole in the cap nut,

loop the wire through the pull ring and twist it securely onto itself to lock the

assembly.

Route the cables to the interface box being careful not to damage the insulation

when passing through bulkheads etc. In order to reduce electrical interference,

separate the sensor cables from electrical wiring and other sources of noise.

Immediately after putting the boat into the water, check the installation for signs

of leakage. Note that small leaks may not be readily observed. It is advised that

the boat is not left in the water for more than 3 hours before re-checking the

installation for leaks.

If leakage is observed, remove the boat from the water and repeat the

installation procedure.

Figure 1.7 - Preparation of a Cored Fibreglass Hull