Japan Radio Co. JLN-740A, Инструкция по эксплуатации

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9-3 Chapter 9 Installation Method
9
9.2 Installation of the Transducer Mounting
CAUTION
It is necessary to choose the place where the bubble is not generated when
sailing, and to install the transducer mounting. The transducer mounting is
installed in place before 1/10 of the ship’s lengths in the large vessel.
Moreover, the transducer mounting is installed in place before it when there
is bow-thruster.
Coil the excess of the transducer cable after installation at the minimum
bending diameter of 400 mm and clamp the cable.
The transducer cable must not be less than 30 m.
Cables less than 30 m in length are not supported.
Cables outside of the range of 30 m to 40 m in length are not guaranteed.
Mounting Location
This equipment measures the ship speed by using the ultrasonic wave.
To cause attenuation and diffusion when the bubble influences the ultrasonic wave, this equipment
cannot measure an accurate ship speed.
Mounting Procedure

After the welding of tank ends, the transducer mounting is installed. If the transducer mounting is
built into the tank, after it is detached from the tank, and the tank is welded.

The tank is welded so that surface of transducer mounting at the sailing may become within 2° for
a horizontal plane.

The tank is installed within 5° so that the bow mark may become parallel to the keel line.