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2. INSTALLATION OF TRANSDUCERS
2-5
Remarks on installation
Installation procedure
If the thickness of the hull varies, then the attenuation of the ultrasound pulse. Select
a location where attenuation is the lowest.
1. Select 2-3 locations considering the four points mentioned below. (You will finalize
the mounting location through some trial and error later.)
Mount the transducer at a location 1/2 to 1/3 of the length of the boat from the
stern.
The mounting location is between 15 to 50 cm from the centerline of the hull.
Do not place the transducer over hull struts or ribs which run under the hull.
Avoid a location where the rising angle of the hull exceeds 15°, to minimize the
effect of the boat's rolling.
2. Clean the face of the transducer to remove any foreign material. Lightly roughen
the face with #100 sandpaper. Also, use the sandpaper to roughen the inside of
the hull where the transducer is to be mounted.
3. Wipe off any sandpaper dust from the face of the transducer.
4. Dry the face of the transducer and the hull.
Coat the transducer face and mounting loca-
tion with silicone sealant. Hardening begins in
approx. 15-20 minutes so do this step without
delay.
Do the installation with the ship moored at a dock, etc. The water depth should be 6.5-
32 feet (2-10 meters).
Turn off the engine.
Install the transducer with the engine room.
Do not power the unit with the transducer in the air, to prevent damage to the trans-
ducer.
Do not use this method on a double layer hull.
Before attaching the transducer to the hull, check that the site is suitable. Put the
transducer in a water-filled plastic bag. Connect the transducer to the display unit and
put the transducer on the installation site. Turn on the display unit and check that the
depth indication appears.
1/3
1/2
Centerline
Transducer
mounting
location
50 cm
50 cm
15 cm
15 cm
Transducer
Silicone
Sealant
9


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