Furuno CI-88, Руководство по установке

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2. MOUNTING
2-10
2.4 Transducer (Hull Unit)
Mounting location
See Chapter 1.
Do not transport the transducer by pulling the cable.
The internal wiring may be cut.
NOTE
2.4.1 Hull mounting
Mounting the transducer for steel hull vessels
1. Select a mounting place on the hull bottom. (Since the transducer cable is comparatively
thick, select a mounting place for the thru-hull pipe where the cable can be easily led
into the cable gland.).
2. If necessary, weld a double plate (shipyard supply) to the hull bottom to reinforce the
hull.
3. Unpack the transducer casing and determine the projecting length, making it 250 mm or
more. Before cutting the casing, note that the transducer casing has “fore-aft direction.”
Then, cut it considering the rising angle of the ship’s hull.
Weld the casing in parallel with ship’s fore-aft line with an accuracy of better than ±1°.
The transducer face should be horizontal at cruising speed.
Transducer casing
Dimple to bow
Transducer fixing flange
4. Make a hole for the thru-hull pipe in the hull bottom. Before welding the thru-hull pipe,
remove the rubber packing from the thru-hull pipe. Weld the thru-hull pipe. Replace the
rubber gasket.
5. Make a hole of 10 to 20 mm diameter on the stern side of the casing to allow water to
penetrate the transducer casing.
6. Weld the casing to the hull bottom. Do not remove the transducer fixing flange to
prevent the casing from being deformed.
7. Dismount the fixing flange from the casing. Fix the transducer to the fixing flange.
8. Pass the transducer cable through the thru-hull pipe. Tighten the cable gland, leaving
0.5 to 1 m of slack in the cable below the cable gland.