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Chapter 3: Installation
9
Chapter 3: Installation
This chapter describes how to install the ST40 Speed instrument, and
associated speed transducer. The transducer is fitted in the hull of the
vessel and is connected to the rear of the instrument.
3.1 Planning your installation
Determine the best positions for both transducer and instrument, such
that the EMC installation guidelines and the Site requirements (below)
are satisfied.
EMC installation guidelines
All Raymarine equipment and accessories are designed to the best
industry standards for use in the leisure marine environment.
Their design and manufacture conform to the appropriate
Electromagnetic Compatibility (EMC) standards, but correct
installation is required to ensure that performance is not compromised.
Although every effort has been taken to ensure that they will perform
under all conditions, it is important to understand what factors could
affect the operation of the product.
The guidelines given here describe the conditions for optimum EMC
performance, but it is recognised that it may not be possible to meet all
of these conditions in all situations. To ensure the best possible
conditions for EMC performance within the constraints imposed by
any location, always ensure the maximum separation possible between
different items of electrical equipment.
For optimum EMC performance, it is recommended that wherever
possible:
• All Raymarine equipment and cables connected to it are:
• At least 1 m (3 feet) from any equipment transmitting or cables
carrying radio signals e.g. VHF radios, cables and antennas. In
the case of SSB radios, the distance should be increased to 2 m
(7 ft).
• More than 2 m (7 ft) from the path of a radar beam. A radar beam
can normally be assumed to spread 20 degrees
above and below
the radiating element.
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