Page 8 of 56
SKIPPER
Electronics AS
Edition: 2021-09-16
ESN100 Operation and Installation Manual
Chapter: Introduction and Specification
Transducer installation
A transducer should be installed in an area securing optimal measurement free from noise and aeration.
It should be possible to draw a cone of +-60 degrees underneath the transducer without any objects entering
the cone.
Generally there should be nothing in front of or close to the transducer that can cause turbulence.
Transducers are normally installed in the turbulence free area in the foreship as close to the bow as pos-
sible within the first 3
rd
of the ship. (see
A
on fig.)
A
Bubbles
Single transducer
installation
A
Bubbles
Side view
Bottom view
The transmitting surface of the transducer must be installed horizontally with no more than 5 degrees tilt.
If this is not possible a blister should be assembled. This should have at least 0.3m of flat area around the
transducer, and be tear drop shaped.
Do not mount transducers close to the propeller or aft of other hull installations (outlets, vents or other
protruding details). It is necessary to select a part of the hull that is submerged under all load and speed
conditions, and to avoid positions where air is trapped.
Refer to SKIPPER’s installation procedures in the appendix and on our web site www.skipper.no regarding
information about sea valve, tank installation, welding, cable glands etc.
Note
:
• Protect the active element of the transducer and
do not paint the surface
.
Transmission in
the air must be avoided
! This may cause mechanical damage of the element.
Larger vessels are often fitted with two transducers, one fore and one aft (see fig.)
The fore transducer is the primary transducer, (normally 50 kHz).
The aft transducer is a secondary transducer, (normally 200 kHz).
The aft transducer may be troubled with aeration and noise and may not operate in speed >4-5 knots.
Aft transducer is mainly used to measure aft depth in slow speed and shallow water.
A
Bubbles
Single transducer
installation
A
Bubbles
Side view
Bottom view
