Installation; Installing The Transducer - Humminbird CH Thirty II Operation Manual

INSTALLATION

It is recommended that your unit be
mounted on a solid flat, surface for
maximum stability. The gimbal bracket
provided with your Chart has eight holes
in the base for mounting screws. We
recommend using all eight holes for a
more stable mount. Standard 1/4 inch
stove bolts with nuts and lock washers are
recommended.

INSTALLING THE TRANSDUCER

This is the most important part of the
installation. To achieve maximum
performance from the Humminbird Chart,
it is suggested that care and careful
planning be exercised in the mounting of
the transducer. The Humminbird CH Thirty
II is designed to operate with the 39 °
cone angle X2-C transducer. A transom
transducer with mounting hardware is
provided as standard equipment with the
Humminbird Chart (Figure 3). This
transducer is designed to mount outside
the hull of the boat, but may be mounted
inside. However, for maximum
performance from your CH-3011, we
recommend mounting the transducer
outside. There might be circumstances
which would require a different style
transducer. If this is the case, we
recommend you contact a dealer
regarding availability.
Determine a suitable location where a smooth flow of water will pass across the transducer face
(Figure 4). The bolts connecting the transducer to its mounting bracket are temporarily left
loosened to allow the transducer to be adjusted and positioned as shown in figure 4 top. Markings
can then be made for each of the four slots, which indicate the position of the screws used to
attach the mounting hardware (Figure 4 bottom). Drill four holes with a smaller diameter bit than
the screws being used. Lightly coat the screws with a silicone sealant to insure a tight, waterproof
bond and bolt the transducer into its proper position, with the beveled edge forward flush with the
bottom of the transom.
Air spaces should be sealed with a silicone sealant applied with a piece of stiff cardboard, taking
precautions against covering the "eye" of the transducer with the adhesive materials. Completed
quickly and efficiently, this type of installation should allow the instrument to give maximum
performance and definition.
The above installation will not give a suitable high-speed reading because of the transducer
angle. It is seldom that a high speed operation