Installation manual Simrad ES120-7C 120 kHz split-beam transducer www.simrad.
Simrad ES120-7C Installation manual This document provides a general description of how to install the Simrad ES120-7C Split-beam transducer. The information must be regarded as general guidelines and recommendations only. The installation shipyard must design and manufacture installation hardware to fit the ES120-7C transducer on each individual vessel.
Document history Document number: 330254 / ISBN-13: 978-82-8066-106-7 Rev.A January 2006 First version. Copyright ©2009 Kongsberg Maritime AS The information contained in this document remains the sole property of Kongsberg Maritime AS. No part of this document may be copied or reproduced in any form or by any means, and the information contained within it is not to be communicated to a third party, without the prior written consent of Kongsberg Maritime AS.
Installation manual Table of contents ABOUT THIS MANUAL ....................................................... 5 SIMRAD ES120-7C ............................................................ 6 WHERE TO MOUNT THE TRANSDUCER ............................... 7 HOW TO INSTALL THE TRANSDUCER .............................. 12 Transducer installation in blister ............................................................................12 Transducer installation in box keel.........................................
Simrad ES120-7C 4 330254/A
About this manual ABOUT THIS MANUAL Purpose The purpose of this installation manual is to provide generic descriptions and illustrations allowing the reader to understand the basic principles for echo sounder transducer installation. About the information provided in this document The information in this document must be regarded as general guidelines and recommendations only. The installation shipyard must design and manufacture installation hardware to fit each individual transducer and vessel.
Simrad ES120-7C SIMRAD ES120-7C The purpose of this manual is the provide the basic information required to install the Simrad ES120-7C Split-beam transducer.
Where to mount the transducer WHERE TO MOUNT THE TRANSDUCER A single answer to the question where to locate the transducer cannot be given. It depends very much on the vessel’s construction, how the hull is shaped and how the water runs along the hull. There are however a number of important guide lines, and some of these are even conflicting. Mount the transducer deep Mount the transducer at a deep position on the hull.
Simrad ES120-7C noise at certain frequencies. Do not place an echo sounder transducer in the vicinity of such objects, and especially not close behind them. For the same reason, it is very important that the hull area around the transducer face is as smooth and level as possible. Even traces of sealing compound, sharp edges, protruding bolts or bolt holes without filling compound will create noise.
Where to mount the transducer and flat bottom, with a rising angle less than around 13 degrees, is prone to giving air problems for the transducer. In any case a transducer location in the forward part of the hull is preferred in order to minimise the influence of the boundary layer. Mount the transducer far away from the propellers The propulsion propeller is the dominant noise source on most fishing vessels, research vessels, merchant vessels and pleasure crafts.
Simrad ES120-7C beam angle your transducer has, the smaller the inclination angle can be. Ensure that you do not mount the transducer with a negative inclination angle. This may cause turbulence under the transducer face, and reduced echo sounder performance. Summary and general recommendations Some of the above guide lines are conflicting, and each case has to be treated individually in order to find the best compromise.
Where to mount the transducer If the vessel hull has a bulbous bow, this may well be a good transducer location, but also here must be taken into consideration the flow pattern of the aerated water. Often the foremost part of the bulb is preferable.
Simrad ES120-7C HOW TO INSTALL THE TRANSDUCER There are many different ways to mount the transducer. These are the recommended methods to mount a circular transducer. Transducer installation in blister With a transducer with circular housing, one recommended installation method is by using a blister. The transducer blister must be designed and manufactured by the installation shipyard to fit the vessel’s size and hull shape.
How to install the transducer Example: Large transducer The illustration below shows a typical transducer blister designed for a large transducer. Note that due to the physical size of the transducer, a U-shaped support bar (E) is used to support the transducer. The purpose of this support is to prevent the transducer from being pushed up into the blister in heavy seas.
Simrad ES120-7C Example: Small transducer The illustration below shows a typical transducer blister designed for a small transducer. The same blister design principles as for a large transducer apply. E E A B (CD017010B) F G C D A Streamlined blister B Mounting ring C Clamping ring D Guide E Air outlet F Forward G Transducer cable Note that the transducer cable must be provided with a cable loop inside the blister. Observe the vertical forward edge of the blister.
How to install the transducer Example: Medium sized transducer without clamping ring The illustration below shows a transducer blister designed for a medium sized transducers. The same blister design principles apply. Note that the transducer is mounted without a clamping ring, which makes it necessary to use a different mounting ring design.
Simrad ES120-7C Common guidelines The best performance is obtained with a blister height of 40 cm or more. A streamlined shape and rounded edges reduce the flow noise. A vertical leading edge or front will guide the aerated water to the sides of the blister. The orientation of the blister should follow the water flow. The interior of the blister must be filled with sea water. Use drainage holes in the bottom and an air outlet on the top.
How to install the transducer Physical location The blister is placed on one of the sides of the hull, and the distance from the keel is a trade off between a close distance giving a turbulent flow of water in a narrow passage, and a large distance bringing the transducer higher up and also more affected by vessel roll. Normally a distance of approximately 1 m is a good compromise. Observe the horizontal and vertical distances (C and D) between the keel and the transducer blister.
Simrad ES120-7C the transducer body. Bolts through the clamping ring into the mounting ring will secure the transducer between them. Note that several transducers use direction guides to allow correct mounting. Smooth surface is important Mounting screws or bolts must not be extruding from the transducer or the area immediately around it.
How to install the transducer Transducer flush mounted in a steel tank Flush mounting is used on very large vessels with a hull so deep that no air bubbles are found below the hull, and on vessels operating in shallow harbours or waters, where a protruding blister can not be accepted. The standard procedure for flush mounting on a steel vessel is to weld a steel tank inside the hull, and mount the transducer into this tank.
Simrad ES120-7C interior. If the tube is extended to open air, drainage must be provided with leakage at the transducer flange or a separate hole in the tank bottom. Example: Flush mounting in a steel tank Transducer mounting in a steel tank is shown in the figure below.
How to install the transducer mount it, the hull plating and the putty around the transducer is as even and smooth as possible. Obstructions on these surfaces will create problems with turbulent flow. Example: Acoustic window The transducer shown in the figure below is mounted inside the tank behind a strong acoustic window which could be made of polycarbonate. The tank is filled with oil.
Simrad ES120-7C Use mounting and clamping rings whenever provided Circular transducers may be provided with mounting and clamping rings, or with drawings to allow for local production of these. The mounting ring is welded to the hole prepared for the transducer, while the clamping ring fits around the edge of the transducer body. Bolts through the clamping ring into the mounting ring will secure the transducer between them. Note that several transducers use direction guides to allow correct mounting.
How to install the transducer Transducer mounted on a drop keel The use of a drop keel with the purpose of stabilising the vessel is well known. A drop keel is also a superior platform for echo sounder transducers. Such instrument keels have been built, mainly on research vessels, often protruding as far as three meters below the hull. At that depth, the water is free of air bubbles up to very high sea states.
Simrad ES120-7C Retractable transducer Hull units allowing the transducer to be lowered and hoisted are commonly used for horizontal looking sonars. When not in use, the transducer is retracted into a trunk. The retractable hull unit is more expensive than a blister, but on vessels with a hull where it is difficult or impossible to install a blister, it may still be worth while. The principles of a hull unit with a retractable transducer is shown below.
Transducer cable glands and splicing TRANSDUCER CABLE GLANDS AND SPLICING The transducer cable must pass through the hull using approved cable glands for the type of vessel in question. About cable glands A steel cable gland is normally used on professional vessels with steel hulls. A bronze cable gland can be delivered as an option for vessels with wood or fibreglass hulls. Vessel not to be classified can as an option use a cable gland made of plastic.
Simrad ES120-7C Cable gland for steel hulls This cable gland kit is designed for steel vessels. It must be welded to the hull plates. F ø35 A A ø65 B C D C E (CD17008A) A Steel conduit B Stuffing tube, DNV approved carbon steel st52.3 C Washers D Rubber gasket E Packing nipple.
Transducer cable glands and splicing Cable gland for wooden and GRP hulls A bronze cable gland kit is available for wooden and GRP vessels. F A E B C B C D C B (CD17008B) A Packing nipple.
Simrad ES120-7C Cable glands for small hulls This cable glands made of plastic is designed for those smaller vessels that do not need to be classified. J A B A C D E F (CD17008C) G H I A Packing nut (bronze). Make sure that you do not to damage the transducer cable by tightening the packing nut too hard! B Rubber gasket C Plastic disk D Rubber gasket E Stuffing tube F Backing nut (bronze) G Backing washer (plastic) H O-ring 42.5 x 3.0 N I O-ring 39.5 x 3.
Transducer cable glands and splicing Transducer cable splicing If you need to cut or lengthen the transducer cable, you must splice it correctly. The cable between the junction box and the transceiver must then be supplied by Simrad, and this must be the same type as used on the transducer(s). To splice the cable, use a metal junction box with EMC cable glands and a terminal block. The terminal block must provide solid fastening of the cable ends as well as sufficient insulation between the wires.
Simrad ES120-7C STEEL CONDUIT Why use steel conduits? It is strongly recommended to lay a steel conduit from the transducer’s cable gland to the echo sounder transceiver, and to pull the transducer cable through this conduit. There are several reasons for this. • It will make it easier at a later stage to replace the transducer. • Noise and interference from other electrical equipment is greatly reduced. • The risk of flooding is greatly reduced if the pipe is terminate above the water line.
Transducer handling and maintenance TRANSDUCER HANDLING AND MAINTENANCE You MUST observe the following rules for handling, maintenance and painting. Rules for transducer handling Note Do not lift the transducer by the cable. Do not expose the transducer to direct sunlight. Do not expose the transducer to excessive heat. Transport protection Some transducers are delivered with a cover plate on the face for protection during transport.
Simrad ES120-7C Jotun Head office address: P.O.Box 2021, N-3248 Sandefjord, Norway Website: www.jotun.com. 1 Racing 2 Non-stop 3 Safeguard Universal primer (125 micron) with Antifouling SeaQuantum Ultra (125 micron) 4 Antifouling Seaguardian International Marine Coatings Address: World-wide offices Wesite: www.international-marine.com. 1 Intersleek tie coat + 425 FCS • BXA386/BXA390/BXA391 Grey • HKA563/HKA570/HKA571 Yellow • Mix BXA386, BXA390 and BXA391 first, then apply.
Transducer handling and maintenance necessary to involve a secondary locking device (e.g. chemical, nylon or mechanical). The Emuge self-lock bolts withstand vibrations better than standard (metric) threads, because the thread contact stops the sideways movement. The special design of the internal thread profile also provides a more even distribution of the tightening stress over the whole thread length. The assembly is just as easy as with a normal (metric) thread.
Simrad ES120-7C • Internal threads can be produced with Emuge taps, cold forming taps or thread mills • Larger thread hole diameters, i.e. increased tool life for threading tools • Larger tolerances for thread hole diameters Drawing standard Whenever self-locking threads are required, this is shown on the technical drawing. In the case of tapping through holes, the arrow at the end of the center line illustrates the screw-in direction of the bolt.
Transducer handling and maintenance Figure 6 Example of use (CD017020C) Note In the case of tapping through holes it is important that the profile of the Emuge self-lock threads is in the correct direction compared with the entering direction of the bolt. Gauge Use Emuge self-lock gauges. Note that the gauge must be used in the correct direction. Self-lock taps provided by Simrad The following self-lock taps are on stock at Simrad, and can be ordered from us.
Simrad ES120-7C DRAWING FILE This chapter contains relevant drawings related to the electrical and physical installation of the ES120-7C Split-beam transducer. Note The mechanical drawings are for information and guidance only. They are not in scale. All dimensions are in mm unless otherwise is noted. The original installation drawings are available on PDF and/or AutoCad format. Visit www.simrad.com to download.
Drawing file General Purpose Transceiver (GPT) wiring Forward 3 4 2 1 Port B Starboard A M C L D Sections seen from top of the transducer 330254/A F H J Junction Box (1:1) (Optional) 1 White Black Blue Black Blue White Channel 1 H J 2 White Black Blue Black Orange White Channel 2 E F 3 White Black Blue Black Green White Channel 3 C D 4 White Black Blue Black Brown White Channel 4 A B Screen W802-4 Rev.
Simrad ES120-7C General Purpose Transceiver (GPT) transducer plug assembly Upper plug case Plug fastening ring Contact body Retaining ring Outer screen and inner screen braid wire untaped and spread out under washer Outer screen together with inner screen. Drain wire, fold back over jacket and temporary fastened with tape. Heat-shrinkable tubing Lower plug case Washers Bottom cap and cable clamp Rubber sleeve Rubber sleeve Note: All measurements are in mm. The drawing is not in scale.
Drawing file Outline dimensions and installation drawings Note Observe the 32 Nm torque when the transducer is mounted using the mounting and clamping rings. Observe the 17 Nm maximum torque when the transducer is mounted using the threaded inserts on the transducer body . In addition to the drawings available in this chapter, an additional drawing is provided on the web site. This is drawing 599–203664 describing an optional steel tank for the transducer.
Simrad ES120-7C Outline dimensions [204579] 40 330254/A
Drawing file Recommended arrangement [204678] 330254/A 41
Simrad ES120-7C 42 330254/A
Drawing file Mounting ring [204675] 330254/A 43
Simrad ES120-7C 44 330254/A
Drawing file Clamping ring [204677] 330254/A 45
Simrad ES120-7C 46 330254/A
Index Index A About, 5 information in this manual, 5 Acoustic window example, 21 installation, 20 Additional information, 5 Air outlet example, 13, 15 Anti-fouling paint, 31 Approval maritime authorities, 5 Arrangement drawing, 41 B Blister Common guidelines, 16 installation, 12 physical location, 17 toe-in, 16 Boundary water layer, 8 Bow thrusters noise, 9 Box keel example, 18 installation, 17 C Cable transducer, splicing, 29 Cable gland about, 25 GRP hull, 27 small hull, 28 steel hull, 26 wooden hull,
Simrad ES120-7C drawing, 40 Physical location blister, 17 Propeller noise, 9 Protruding objects, 7 Purpose this manual, 5 R Retractable installation, 24 S Self-locking taps, 32 Shielding steel conduit, 30 Simrad website, 5 Smooth surface, 12, 18–20, 22 Splicing transducer cable, 29 Steel conduit diameter, 30 qualities, 30 shielding, 30 why, 30 Steel hull cable gland, 26 Steel tank flush mounting, 19 Streamlined blister example, 13, 15 Sunlight do NOT expose, 31 Support bar, 12, 18–19 Surface smooth, 12,
Index 330254/A 49
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