Raymarine L470 instruction manual Installation, About the Transducer

2 – Installation

The installation process has four parts:

•Mounting the transducer

•Mounting the display unit

•Connecting the cables for the transducer and power supply

•Calibrating the display unit

About the Transducer

Several different kinds of transducers can be used with this unit. The transom- mount style, used most often, and in-hull types are shown in Fig. 2-1.

Besides measuring depth, the transducers have two other sensors: a paddle wheel which detects the speed of the boat, and a sensor for the water temperature. An optional transducer, the Sidelooker, detects objects by looking out to the sides of the boat.

Since the transducer is very important to the operation of the FishFinder, it is vital that the transducer be mounted correctly. The transducer will give the most reliable readings if it looks into water which is smooth and undisturbed. If you place the transducer so bubbles or turbulence flow across the face of the unit, the system may give inaccurate readings.

There are three important rules when mounting any type of transducer:

•The transducer should be continuously covered by water when the boat is moving. (If the transducer is mounted near the side of the boat, it may be exposed when the boat is turning.)

•The transducer should be placed where turbulence or bubbles will not pass directly over the face of the unit. Don’t place the transducer behind any running strakes, intakes, or thru-hull fittings which create turbulence.

•The transducer should be mounted where it will not be affected by the wash from the propeller(s).

4 Installation