Simrad ES70-7C 70 kHz split-beam transducer · SimradES70-7C...

Installation manual

Simrad ES70-7C

70 kHz split-beam transducer

T E C H N O L O G Y F O R S U S T A I N A B L E F I S H E R I E Swww.simrad.com

Simrad ES70-7C

Installation manual

This document provides a general description of how toinstall the Simrad ES70-7C Split-beam transducer. Theinformation must be regarded as general guidelines andrecommendations only. The installation shipyard mustdesign and manufacture installation hardware to fit theES70-7C transducer on each individual vessel.

307324/B20 January 2009

Document history

Document number: 307324 / ISBN-10: - / ISBN-13: 978-82-8066-080-0

Rev.A November 2006 First version.

Rev.B January 2009Minor changes to the document structure. Mounting arrangementdrawing changed, see Recommended arrangement [204678] onpage 41.

Copyright©2009 Kongsberg Maritime ASThe information contained in this document remains the sole property of Kongsberg Maritime AS. No partof this document may be copied or reproduced in any form or by any means, and the information containedwithin it is not to be communicated to a third party, without the prior written consent of KongsbergMaritime AS. The document, or any part of it, may not be translated to any other language without thewritten approval from Kongsberg Maritime AS.

DisclaimerKongsberg Maritime AS endeavours to ensure that all information in this document is correct and fairlystated, but does not accept liability for any errors or omissions.

WarningThe equipment to which this manual applies must only be used for the purpose for which itwas designed. Improper use or maintenance may cause damage to the equipment and/or injuryto personnel. The user must be familiar with the contents of the appropriate manuals beforeattempting to install, operate or work on the equipment.Kongsberg Maritime AS disclaims any responsibility for damage or injury caused by improperinstallation, use or maintenance of the equipment.

SupportIf you require maintenance on your Simrad product contact your local dealer. You can also contact us usingthe following address: [email protected]. If you need information about our other products,visit www.simrad.com. On our web site you will also find a list of our dealers and distributors.

Ko n g s b e r g M a r it im e A SS t ra n d p r o m e n a d e n 5 0P. O. Bo x 1 1 1N- 3 1 9 1 H o r t e n , N o r wa y

S im r a d

Te le p h o n e : + 4 7 3 3 0 3 4 0 0 0Te le fa x : + 4 7 3 3 0 4 2 9 8 7

co n t a c t @s im ra d . co mw w w . s im r a d . c o m

mailto:[email protected]

http://www.simrad.com

Installation manual

Table of contents

ABOUT THIS MANUAL ....................................................... 5

SIMRAD ES70-7C .............................................................. 6

WHERE TO MOUNT THE TRANSDUCER............................... 7

HOW TO INSTALL THE TRANSDUCER .............................. 12Transducer installation in blister ............................................................................12Transducer installation in box keel.........................................................................17Transducer flush mounted in a steel tank ...............................................................19Transducer with acoustic window ..........................................................................20Transducer mounted inside the hull .......................................................................21Transducer mounted on a drop keel .......................................................................23Retractable transducer ............................................................................................24TRANSDUCER CABLE GLANDS AND SPLICING ................. 25About cable glands .................................................................................................25Cable gland for steel hulls ......................................................................................26Cable gland for wooden and GRP hulls .................................................................27Cable glands for small hulls ...................................................................................28Transducer cable splicing .......................................................................................29Order numbers ........................................................................................................29STEEL CONDUIT.............................................................. 30

TRANSDUCER HANDLING AND MAINTENANCE ................ 31Rules for transducer handling.................................................................................31Approved anti-fouling paints..................................................................................31Using self-locking taps ...........................................................................................32DRAWING FILE ............................................................... 36Echo sounder connections ......................................................................................36

Splicing the transducer cable ....................................................................... 36General Purpose Transceiver (GPT) wiring................................................... 37General Purpose Transceiver (GPT) transducer plug assembly....................... 38

Outline dimensions and installation drawings........................................................39Outline dimensions [204603]....................................................................... 40Recommended arrangement [204678] .......................................................... 41Mounting ring [204716] .............................................................................. 43Clamping ring [204718] .............................................................................. 45

307324/B 3

Simrad ES70-7C

4 307324/B

About this manual

ABOUT THIS MANUAL

Purpose

The purpose of this installation manual is to provide genericdescriptions and illustrations allowing the reader to understandthe basic principles for echo sounder transducer installation.

About the information provided in this document

The information in this document must be regarded as generalguidelines and recommendations only. The installation shipyardmust design and manufacture installation hardware to fit eachindividual transducer and vessel.

Approval by maritime authorities

Whenever required, the installation shipyard must also have theinstallation approved by the applicable maritime authorities.

Additional information

For additional detailed information about the transducer tobe installed, refer to the documentation provided with thetransducer. Drawings and descriptions can also be obtained fromhttp://www.simrad.com.

307324/B 5


Simrad ES70-7C

SIMRAD ES70-7CThe purpose of this manual is the provide the basic informationrequired to install the Simrad ES70-7C Split-beam transducer.

Transducer and documents

• Simrad ES70–7C: KSV-203678• Product specification: 855–164385• Drawings:

– Outline dimensions: 834–204603– Mounting ring: 871–204716– Clamping ring: 871–204718– Mounting arrangement: 820-204678

Note

Although drawings are provided to explain the installationprinciples, the installation shipyard must provide the finaldrawings required to fit the transducer to each individualvessel. Also, when applicable, the installation shipyardmust have the drawings and installation approved by theproper maritime authorities. The drawings specific forthe ES70-7C transducer are located in the Drawing fileon page 36.

Technical specifications

Refer to the ES70-7C product specification.

Additional parts provided for installation

The following items can be supplied by Simrad to facilitateinstallation:• Mounting ring: ES7–203680• Clamping ring: ES7–203679• Transducer cable (for extension): 642–078215

6 307324/B

Where to mount the transducer

WHERE TO MOUNT THE TRANSDUCERA single answer to the question where to locate the transducercannot be given. It depends very much on the vessel’sconstruction, how the hull is shaped and how the water runsalong the hull. There are however a number of important guidelines, and some of these are even conflicting.

Mount the transducer deep

Mount the transducer at a deep position on the hull. Consider thesituations when the vessel is unloaded, and when it is pitchingin heavy seas.There are several reasons for this.1 The upper water layers of the sea contain a myriad of small

air bubbles created by the breaking waves. In heavy seas theupper 5 to 10 metres may be filled with air, and the highestconcentrations will be near the surface. Air bubbles absorband reflect the sound energy, and they may in worst casesblock the sound transmission altogether.

2 Another reason to go deep is the cavitation in front ofhigh power transducers. Cavitation is the formation ofsmall bubbles in the water due to the resulting localpressure becoming negative during parts of the acousticpressure cycles. The cavitation threshold increases with thehydrostatic pressure.

3 The transducer must never be lifted free of the water surface.Transmitting into open air may damage the transducerbeyond repair. Mounting the transducer at a deep positionon the hull prevents this.

4 If the transducer is lifted up from the water during heavyseas, it may be damaged when the hull strikes back at thesea surface. This is especially important for low frequencytransducers with large faces.

Mount the transducer midway between the bowand the stern to avoid heave effects

Heave is the up and down movement of the vessel. It disturbs theecho traces in the echogram, so that a flat bottom is displayedas a wave. A transducer location in the middle of the vesselminimises the influence of vessel roll and pitch.

Mount the transducer away from protrudingobjects on the hull

Objects protruding from the hull, such as zinc anodes, sonartransducers or even the vessel’s keel, generate turbulence andflow noise. Holes and pipe outlets are also important noisesources. They may act as resonant cavities amplifying the flow

307324/B 7

Simrad ES70-7C

noise at certain frequencies. Do not place an echo soundertransducer in the vicinity of such objects, and especially notclose behind them. For the same reason, it is very importantthat the hull area around the transducer face is as smooth andlevel as possible. Even traces of sealing compound, sharp edges,protruding bolts or bolt holes without filling compound willcreate noise.

Mount the transducer at the forward part of thehull to minimise the effects from the boundarywater layer

When the vessel forces its way through the sea, the frictionbetween the hull and the water creates a boundary layer. Thethickness of the boundary layer depends upon vessel speed andthe roughness of the hull. Objects protruding from the hull, anddents in the hull, disturb the flow and increase the thickness ofthe boundary layer. The flow in this boundary layer may belaminar or turbulent. A laminar flow is a nicely ordered, parallelmovement of the water. A turbulent flow has a disorderly pattern,full of eddies. The boundary layer increases in thickness when theflow goes from laminar to turbulent. The figure below illustratesthe boundary layer of a vessel moving through the water.

Figure 1 Boundary water layer

A Turbulent flowB Laminar flowC Air bubbles in the water

Furthermore, air bubbles in the sea water are pressed down belowthe hull and mixed into the boundary layer. The boundary layeris thin underneath the forward part of the vessel, and increases inthickness as it moves towards aft. If the sides of the hull are steep,some of the air bubbles in the boundary layer may escape to thesea surface along the vessel sides. It is our experience that a wide

8 307324/B


and flat bottom, with a rising angle less than around 13 degrees,is prone to giving air problems for the transducer. In any case atransducer location in the forward part of the hull is preferred inorder 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 mostfishing vessels, research vessels, merchant vessels and pleasurecrafts. The noise is transmitted through the sea water. Forthis reason, the transducer should be placed far away from thepropeller, which means on the fore part of the hull. Positionsoutside the direct line of sight from the propeller are favourable.On small vessels with short distances it is advised to mount thetransducer on that side of the keel where the propeller bladesmove upwards, because the propeller cavitation is strongest onthe other side. The cavitation starts most easily when the waterflows in the same direction as the propeller blade, and that is tosome degree the case at that side of the keel where the propellerblades move downwards.

Mount the transducer far away from the bowthrusters

Bow thruster propellers are extremely noisy. When in operation,the noise and cavitation bubbles created by the thruster makethe echo sounder useless, almost no matter where the transduceris installed. And when not in operation, the tunnel createsturbulence, and if the vessel is pitching, the tunnel may be filledwith air or aerated water in the upper position and release this inthe lower position. In general, all transducers must be thereforeplaced well away from the bow thruster. However, this is notan invariable rule. Certain thruster designs combined with itsphysical location on the hull may still offer suitable transducerlocations near the thruster. If you are in doubt, consult a navalarchitect.

Mount the transducer with a slightly inclinedtransducer face

Ideally, the transducer face should be mounted in parallel with thesea surface when the vessel is in normal trim, as this will providethe most accurate echo information. However, it is also veryimportant that the water flow over the transducer face is laminar.In order to ensure laminar flow, the transducer face may be tiltedslightly upwards in relation to the water flow. This allows theflowing water to meet the face directly, and assures laminar flow.The inclination angle must however be determined carefully. Theangle must be small on transducers with narrow beam angles. Asa rule of thumb, mount transducers with beam angles smallerthan seven degrees with minimum inclination angle. The smaller

307324/B 9

Simrad ES70-7C

beam angle your transducer has, the smaller the inclination anglecan be. Ensure that you do not mount the transducer with anegative inclination angle. This may cause turbulence under thetransducer face, and reduced echo sounder performance.

Summary and general recommendations

Some of the above guide lines are conflicting, and each case hasto be treated individually in order to find the best compromise.Generally the propeller noise is the dominant factor, and arecommended transducer location is in the fore part of the hull,with maximum distance from the bow equal to one third of thetotal length of the hull at the water line.

Figure 2 General recommendation for transducer location

A TransducerB Inclination angleC Hull length at water lineD Maximum 1/3 of the hull length at water line (C)

10 307324/B


If the vessel hull has a bulbous bow, this may well be a goodtransducer location, but also here must be taken into considerationthe flow pattern of the aerated water. Often the foremost partof the bulb is preferable.

Figure 3 Recommended location of the transducer on a bulboushull

A ThrusterB Transducer location

307324/B 11

Simrad ES70-7C

HOW TO INSTALL THE TRANSDUCERThere are many different ways to mount the transducer. Theseare the recommended methods to mount a circular transducer.

Transducer installation in blisterWith a transducer with circular housing, one recommendedinstallation method is by using a blister. The transducer blistermust be designed and manufactured by the installation shipyardto fit the vessel’s size and hull shape.

Use mounting and clamping rings wheneverprovided

Circular transducers may be provided with mounting andclamping rings, or with drawings to allow for local productionof these. The mounting ring is welded to the hole prepared forthe transducer, while the clamping ring fits around the edge ofthe transducer body. Bolts through the clamping ring into themounting ring will secure the transducer between them. Notethat several transducers use direction guides to allow correctmounting.

Smooth surface is important

Mounting screws or bolts must not be extruding from thetransducer or the area immediately around it. Make sure that thesurface of the transducer face, the installation hardware used tomount it, the hull plating and the putty around the transducer isas even and smooth as possible. Obstructions on these surfaceswill create problems with turbulent flow.

Use a horizontal support bar on large transducers

We recommend that large transducers are fitted with a horizontalsupport bar. The purpose of this support bar is to protect thetransducer from damage in the event of slamming. This happensif the vessel hull climbs out of the water in heavy seas. The forceof the water when the hull falls down may push the transducerup and cause damage to its mounting. The support bar can besecured to the mounting ring using threaded rods.[1]

1. Slamming is the impact of the bottom structure of a ship onto the sea surface. It is mainly observedwhile sailing in waves, when the bow raises from the water and subsequently impacts on it. Slamminginduces extremely high loads to ship structures and is taken under consideration when designing ships.(Wikipedia)

12 307324/B

How to install the transducer

Example: Large transducer

The illustration below shows a typical transducer blister designedfor a large transducer. Note that due to the physical size ofthe transducer, a U-shaped support bar (E) is used to supportthe transducer. The purpose of this support is to prevent thetransducer from being pushed up into the blister in heavy seas.

(CD017010A)

H

E

E

KG

B

D

A

C

F

J

I

A Streamlined blisterB Stiffening ribC Drainage holesD Inclination angleE U-shaped support bar (on large transducers)F ForwardG Cable service loopH Stuffing tubeI Minimum 400 mmJ Rounded cornersK Air outlet

307324/B 13

Simrad ES70-7C

Example: Small transducer

The illustration below shows a typical transducer blister designedfor a small transducer. The same blister design principles as for alarge transducer apply.

E E

A

C

G

D

F

B(CD017010B)

A Streamlined blisterB Mounting ringC Clamping ringD GuideE Air outletF ForwardG Transducer cableNote that the transducer cable must be provided with a cable loopinside the blister. Observe the vertical forward edge of the blister.This will guide the water to each side of the blister.

14 307324/B


Example: Medium sized transducer withoutclamping ring

The illustration below shows a transducer blister designed for amedium sized transducers. The same blister design principlesapply. Note that the transducer is mounted without a clampingring, which makes it necessary to use a different mounting ringdesign.

A

B

C

H

F

EE

G

D

I

(CD017010E)

A Streamlined blisterB Mounting ringC BoltD Self-locking threadsE Air outletF ForwardG Transducer cableH TransducerNote that the transducer cable must be provided with a cable loopinside the blister. Observe the vertical forward edge of the blister.This will guide the water to each side of the blister.

307324/B 15

Simrad ES70-7C

Common guidelines

The best performance is obtained with a blister height of 40 cmor more. A streamlined shape and rounded edges reduce the flownoise. A vertical leading edge or front will guide the aeratedwater to the sides of the blister. The orientation of the blistershould follow the water flow.The interior of the blister must be filled with sea water. Usedrainage holes in the bottom and an air outlet on the top. Thewater pressure behind the transducer will then compensate forthe outside pressure during vessel movements in rough sea.We recommend that large diameter transducers are fitted with ahorizontal U-shaped support bar. This bar can then be securedto the mounting ring using threaded rods.The transducer cable penetrates the hull in a stuffing tube. Leavean adequate loop of the cable behind the transducer for easymounting or removal of the transducer.

Toe-in

The primary consideration must be to allow laminar water flow.In most cases this is achieved by designing the blister in parallelwith the keel. However, if the blister is located close to the bow,the front of the blister may have a few degrees toe-in towardsthe bow.

(CD17010C)

A

B

C

A KeelB BlisterC Toe-in angle

16 307324/B


Physical location

The blister is placed on one of the sides of the hull, and thedistance from the keel is a trade off between a close distancegiving a turbulent flow of water in a narrow passage, and a largedistance bringing the transducer higher up and also more affectedby vessel roll. Normally a distance of approximately 1 m is agood compromise.Observe the horizontal and vertical distances (C and D) betweenthe keel and the transducer blister. On a medium sized vessel, thehorizontal distance (C) should be approximately 1 meter. Thevertical distance (D) must in general be as small as possible. Thisis important to prevent the keel from shadowing the transducerbeam in shallow waters.

A KeelB Transducer

blisterC Horizontal

distancebetween keeland blister

D Verticaldistancebetween theblister surfaceand the keel

Transducer installation in box keelVessels with a box keel may use this for transducer installation.The box keel is already the deepest part of the vessel. If thebox keel is too narrow to accommodate the transducer, it can bewidened, either symmetrically or to one side only. In the lastcase the installation could also be described as a blister mergedinto the keel.


Circular transducers may be provided with mounting andclamping rings, or with drawings to allow for local productionof these. The mounting ring is welded to the hole prepared forthe transducer, while the clamping ring fits around the edge of

307324/B 17

Simrad ES70-7C

the transducer body. Bolts through the clamping ring into themounting ring will secure the transducer between them. Notethat several transducers use direction guides to allow correctmounting.





Example: Box keel installation

The figure below illustrates a symmetrical box keel installation.

A Box keelB U-shaped

support bar(only requiredon largetransducers)

C Stuffing tubeD Cable in steel

conduitE Cable service

loop

(CD

1701

1A)

A

B

D

C

E


18 307324/B


Transducer flush mounted in a steel tankFlush mounting is used on very large vessels with a hull so deepthat no air bubbles are found below the hull, and on vesselsoperating in shallow harbours or waters, where a protrudingblister can not be accepted.The standard procedure for flush mounting on a steel vessel isto weld a steel tank inside the hull, and mount the transducerinto this tank.







Water filled

As for a blister, the interior of the tank must be filled with water.This can be accomplished by air release through a steel tube,which is extended either to open air 1.5 m above the water lineor to the water outside the hull at a point higher than the tank


307324/B 19

Simrad ES70-7C

interior. If the tube is extended to open air, drainage must beprovided with leakage at the transducer flange or a separate holein the tank bottom.

Example: Flush mounting in a steel tank

Transducer mounting in a steel tank is shown in the figure below.

A Steel tankB WaterC Drainage holeD Cable service

loopE Steel tube for

air outletF Stuffing tubeG Cable in steel

conduit

(CD17012A)

B

A

G

C

D

EF

Transducer with acoustic windowVessels operating in arctic waters need special attention ontransducer installation. Floating blocks of ice may damage evena flush mounted transducer face. For this situation Simrad offersarctic tanks in different sizes.




Mounting screws or bolts must not be extruding from thetransducer or the area immediately around it. Make sure that thesurface of the transducer face, the installation hardware used to

20 307324/B


mount it, the hull plating and the putty around the transducer isas even and smooth as possible. Obstructions on these surfaceswill create problems with turbulent flow.

Example: Acoustic window

The transducer shown in the figure below is mounted inside thetank behind a strong acoustic window which could be made ofpolycarbonate. The tank is filled with oil.

A Steel tankB OilC Acoustic

windowD Cable service

loopE Stuffing tubeF Cable in steel

conduitG Oil inlet

(CD017012B)

B

A

C

G

D

E

F

Transducer mounted inside the hullThe transducer can also be mounted inside the hull.An installation of the transducer inside the hull, and soundingthrough the hull, requires a good acoustic contact between thetransducer face and the hull. Build a tank around the transducerand fill it with a liquid. Oil used in hydraulic systems is a wellsuited liquid for this purpose. It contains no gas bubbles andis non-corrosive.Typical values of the two way loss are 3 dB for polyester, 6 dBfor aluminium and 10 dB for steel. Hulls made of wood or asandwich type with foam in the middle, attenuate the sound somuch that through hull sounding must be regarded as impossible.The loss varies with the distance between transducer face andthe hull. The best result is obtained when the distance is half awavelength. Consult Simrad for advice. In addition to the loss,the beam pattern is degraded, because a larger area of the hull isset into vibrations.

307324/B 21

Simrad ES70-7C





Example: Mounting inside the hull

The transducer shown in the figure below is mounted inside thehull. The tank is filled with oil.

A Steel tankB OilC Hull platingD Cable service

loopE Stuffing tubeF Cable in steel

conduitG Hole for oil

fillingH Air outlet

(CD017012C)

B

A

C

D

E

F

G H

22 307324/B


Transducer mounted on a drop keelThe use of a drop keel with the purpose of stabilising the vesselis well known.A drop keel is also a superior platform for echo soundertransducers. Such instrument keels have been built, mainly onresearch vessels, often protruding as far as three meters belowthe hull. At that depth, the water is free of air bubbles up tovery high sea states. The vessel is then able to perform reliableacoustic measurements in open sea a larger part of the year.

(CD017012D)

B

C

A

A Instrument keel shaftB Lowered positionC Bottom view

307324/B 23

Simrad ES70-7C

Retractable transducerHull units allowing the transducer to be lowered and hoisted arecommonly 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 onvessels with a hull where it is difficult or impossible to install ablister, it may still be worth while. The principles of a hull unitwith a retractable transducer is shown below.Vessels without a keel and with a wide, flat bottom is an examplewhere a retractable hull unit can be the only acceptable methodfor bringing the echo sounder transducer below the boundarylayer.

(CD

0170

12E

)

B

E

C

D

A

A TransducerB TrunkC Transducer

shaftD Transducer

shaft sleeveE Keel

24 307324/B

Transducer cable glands and splicing

TRANSDUCER CABLE GLANDS AND SPLICINGThe transducer cable must pass through the hull using approvedcable glands for the type of vessel in question.

About cable glandsA steel cable gland is normally used on professional vesselswith steel hulls. A bronze cable gland can be delivered as anoption for vessels with wood or fibreglass hulls. Vessel not to beclassified can as an option use a cable gland made of plastic.

Note

Simrad strongly recommends that a length of conduit is fittedaround transducer cable glands made of steel or bronze andextended over the water-line inside the vessel. This precautionreduces the danger of flooding in the event of gland failure andtransducers installed in this manner are also easier to replace.

Some vessels may experience difficulties finding suitable areasof the hull for mounting transducer cable glands due to existingwater tanks, concrete ballast or other obstacles. A possiblesolution in such cases is to run the transducer cables in a steelconduit aft along the hull until a suitable cable gland location isavailable. The respective cable gland can then be installed asdescribed in the following instructions.

Note

Simrad takes no responsibility for the correct installation ofcable glands, associated hull modifications and/or structuralsupport of transducer cable penetration. These activities aresubject to individual approval by the respective classificationsociety for the vessel in question.

307324/B 25

Simrad ES70-7C

Cable gland for steel hullsThis cable gland kit is designed for steel vessels. It must bewelded to the hull plates.

(CD17008A)

ø35

ø65

A

A

B

C

CD

E

F

A Steel conduitB Stuffing tube, DNV approved carbon steel st52.3C WashersD Rubber gasketE Packing nipple. Make sure that you do not damage the

transducer cable by tightening the packing nipple too hard!F Cable to the echo sounder (or a junction box)The cable gland kit includes all of the necessary parts needed toinstall the unit except screws.Simrad recommends that a one inch steel conduit (that thetransducer cable will be run through) with an inside threadeddiameter of three-quarter inches is welded to the gland’s stuffingtube. The conduit must extend to above the vessel’s water line.

26 307324/B


Cable gland for wooden and GRP hullsA bronze cable gland kit is available for wooden and GRPvessels.

(CD17008B)

A

B

B

B

C

C

C

D

E

F

A Packing nipple. Make sure that you do not damage thetransducer cable by tightening the packing nipple too hard!

B WashersC Rubber gasketsD Hole diameter 28 mmE Steel conduitF Cable to the echo sounder (or a junction box)The cable gland kit includes all of the necessary parts needed toinstall the unit except screws.Simrad recommends that a one inch steel conduit (that thetransducer cable will be run through) with an inside threadeddiameter of three-quarter inches is attached to the gland’s packingnipple. This connection must be watertight, and the conduit mustextend to above the vessel’s water line.

307324/B 27

Simrad ES70-7C

Cable glands for small hullsThis cable glands made of plastic is designed for those smallervessels that do not need to be classified.

(CD17008C)

A

A

J

BC

D

G

E

F

H

I

A Packing nut (bronze). Make sure that you do not to damagethe transducer cable by tightening the packing nut too hard!

B Rubber gasketC Plastic diskD Rubber gasketE Stuffing tubeF Backing nut (bronze)G Backing washer (plastic)H O-ring 42.5 x 3.0 NI O-ring 39.5 x 3.0 NJ Cable to the echo sounder (or a junction box)Stuffing tube hole diameter: 36 mm ±1.5 mm.Apply ample amount of sealant between the backing washer (H)and the hull plate.The cable gland kit contains all the listed parts, except the sealant.

Note

The two O-rings must be clean, in good condition and free of cutsor other defects which could affect their watertight integrity.

28 307324/B


Transducer cable splicingIf you need to cut or lengthen the transducer cable, you mustsplice it correctly. The cable between the junction box and thetransceiver must then be supplied by Simrad, and this must bethe same type as used on the transducer(s). To splice the cable,use a metal junction box with EMC cable glands and a terminalblock. The terminal block must provide solid fastening of thecable ends as well as sufficient insulation between the wires. Werecommend that the cable screen is connected to the junctionbox chassis using the EMC cable glands, but if you do this, thejunction box chassis must not be connected to vessel’s ground.

Note

Do not solder the wires together with only electrical tape forinsulation. This will result in electrical noise and reducedoperational performance.

Do not connect the cable screen to the vessel’s ground.

Order numbersThe cable glands described in this chapter are available as kitsfrom Simrad. Observe the following order numbers.

Hull type Item Order number

Steel Cable gland kit, steel,8 to 15 mm cables

499–037763

Steel Cable gland kit, steel,17 to 18,5 mm cables

305609

Wood/GRP Cable gland kit,bronze

119-038200

Small Cable gland kit,plastic

599-202182

307324/B 29

Simrad ES70-7C

STEEL CONDUIT

Why use steel conduits?

It is strongly recommended to lay a steel conduit from thetransducer’s cable gland to the echo sounder transceiver, and topull the transducer cable through this conduit. There are severalreasons 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.With a steel conduit the installation will satisfy the EUregulations for EMC interference. Without a steel conduit, thereis a risk of reduced echo sounder performance.

Steel conduits qualities and shielding

The steel conduit must be unbroken and watertight from thetransducer to above the water line. From there, the cable canbe pulled further, or a junction box can be installed to facilitatefurther connections. Note that the steel conduit must act as acontinuous electrical screen all the way.Steel conduit dimensions:• minimum 35 mm inner diameter• minimum 6 mm wall thickness (4.5 mm if galvanised)

More that one transducer cable?

If two or more transducers are installed close to each other it ispossible to pull their cables in the same steel conduit, providedthe conduit diameter is increased accordingly. However, for easyreplacement it is recommended that each transducer has its ownsteel conduit.

30 307324/B

Transducer handling and maintenance

TRANSDUCER HANDLING ANDMAINTENANCE

You MUST observe the following rules for handling,maintenance and painting.

Rules for transducer handlingNote

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 facefor protection during transport. Let this plate stay on as long aspossible, but do not forget to remove it before the vessel goesinto the sea.

Painting the transducer face

An anti-fouling paint may be applied to the transducer face.Because some paint types may be aggressive to the polyurethanein the transducer face, please consult Simrad’s list of approvedpaints. See Approved anti-fouling paints on page 31.

Cleaning the transducer face

Whenever opportunity arise, for example when the vessel is drydocked, the transducer face may be cleaned for shells and othermarine fouling. Be careful not to make cuts in the transducerface. Use a piece of soft wood or a very fine grade emery paper.

Special rules for acoustic windows

Arctic tanks have acoustic windows made of polycarbonate.These must neither be painted nor cleaned with chemicals.Acoustic windows must not be exposed to direct sunlight.

Approved anti-fouling paintsThis is Simrad’s list of approved antifouling paints onpolyurethane transducer housing.

307324/B 31

Simrad ES70-7C

Jotun

Head office address: P.O.Box 2021, N-3248 Sandefjord, NorwayWebsite: www.jotun.com.1 Racing2 Non-stop3 Safeguard Universal primer (125 micron) with Antifouling

SeaQuantum Ultra (125 micron)4 Antifouling Seaguardian

International Marine Coatings

Address: World-wide officesWesite: 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.

When dry, mix HKA563, HKA570 and HKA571, apply.2 Intersmooth 360 Ecoloflex SPC3 Micron Ekstra

Hempel IFA Coatings

Head office address: Hempel A/S, Lundtoftevej 150, Kgs.Lyngby, DK-2800 Copenhagen, DenmarkWebsite: www.hempel.com.1 Hempel A/F Classic 76550Note

Refer to the manufacturer’s documentation and data sheets fora complete procedure.

Using self-locking tapsScrew connections are generally made so that they can beloosened again. However, accidental loosening, especially underdynamic stress, must be avoided. For this reason it is oftennecessary to use additional locking devices. These are oftenexpensive, they can be used once only, or react critically totemperature changes.

Introduction to Emuge self-locking threads

Emuge self-lock is a tap design with an integrated locking feature.Standard metric bolts are used. The internal thread provides aself-locking connection, which can be used repeatedly. It is not

32 307324/B

http://www.jotun.com

http://www.international-marine.com

http://www.hempel.com


necessary to involve a secondary locking device (e.g. chemical,nylon or mechanical). The Emuge self-lock bolts withstandvibrations better than standard (metric) threads, because thethread contact stops the sideways movement. The specialdesign of the internal thread profile also provides a more evendistribution of the tightening stress over the whole thread length.The assembly is just as easy as with a normal (metric) thread.There is no general applicable standard (e.g. DIN standard) forthe Emuge self-lock thread.

Figure 4 Example, internal and external threads

A B C

2

1(CD017020B)

A Emuge’s saw-tooth profile up to pitch P ≤ 0.7 mmB Emuge’s saw-tooth profile up to pitch P ≥ 0.7 mmC Standard thread1 External thread2 Internal threadThe advantages of using Emuge self-lock thread include:• The thread locking feature is integrated in the internal thread• Modified profile with ramp surface in the direction of stress• 30 degree ramp surface provides self-locking effect• Easy assembly• No assembly errors (forgetting the locking device) possible• Use of standard external threads (screws) with tolerance class

“medium”• Even distribution of stress over the whole thread length• No stripping of threads• Economically efficient locking system, no additional

components are necessary• Undiminished holding power even under dynamic stress• Repeated loosening and re-tightening without loss of function

307324/B 33

Simrad ES70-7C

• Internal threads can be produced with Emuge taps, coldforming taps or thread mills

• Larger thread hole diameters, i.e. increased tool life forthreading tools

• Larger tolerances for thread hole diameters

Drawing standard

Whenever self-locking threads are required, this is shown onthe technical drawing. In the case of tapping through holes,the arrow at the end of the center line illustrates the screw-indirection of the bolt.

Figure 5 Drawing examples, self-locking thread

M8 SL*M10 SL*

(CD017020A)

The drawing is normally provided with the following text (orsimilar):Note: The self-lock threads marked with SL* must be made inaccordance with procedure 842–202125. Drill diameters forthreads differ from standard. Self-lock taps can be supplied bySimrad.

Taps

The pretension locking thread self–lock (taps) from manufacturerEmuge must be used.

34 307324/B


Figure 6 Example of use

(CD017020C)

Note

In the case of tapping through holes it is important that theprofile of the Emuge self-lock threads is in the correct directioncompared with the entering direction of the bolt.

Gauge

Use Emuge self-lock gauges. Note that the gauge must be usedin the correct direction.

Self-lock taps provided by Simrad

The following self-lock taps are on stock at Simrad, and can beordered from us.Threads Drill diameter for

threadsPart.no

M6 ø5.2 700-078838

M8 ø7.0 700-078531

M10 ø8.8 700-078408

M12 ø10.7 700-078409

M16 ø14.5 700-078410

Supplier and manufacturer

Norwegian supplier is:Tingstad AS, P.O.Box 83, Kalbakken, 0902 Oslo, Norwayhttp://www.tingstad.noManufacturer is:EMUGE-Werk Richard Glimpel, Nurnberger Strasse 96-100,D-90607 Lauf, Germanyhttp://www.emuge.de

307324/B 35

http://www.tingstad.no

http://www.emuge.de

Simrad ES70-7C

DRAWING FILEThis chapter contains relevant drawings related to the electricaland physical installation of the ES70-7C Split-beam transducer.

Note

The mechanical drawings are for information and guidance only.They are not in scale. All dimensions are in mm unless otherwiseis noted.

The original installation drawings are available on PDF and/orAutoCad format. Visit www.simrad.com to download.

Topics

• Echo sounder connections on page 36• Outline dimensions and installation drawings on page 39

Echo sounder connectionsObserve the following information related to electricalconnection of the ES70-7C Split-beam transducer.

Topics

• Splicing the transducer cable on page 36• General Purpose Transceiver (GPT) wiring on page 37• General Purpose Transceiver (GPT) transducer plugassembly on page 38

Splicing the transducer cableIf you need to splice the transducer cable, it is very importantto use the correct cable, and to avoid ground loops. We stronglyrecommend the use of a junction box. We also recommend thatyou install the transducer cable in a steel conduit.

Related topics

• Transducer cable splicing on page 29• Steel conduit on page 30• General Purpose Transceiver (GPT) transducer plugassembly on page 38

36 307324/B


Drawing file

General Purpose Transceiver (GPT) wiring

M

EF

JH

D

C

K

L

AB

N

Transducercable

E

H

DC

F

J

AB

Junction Box (1:1)(Optional)

GPT Transducersocket

Channel 1

Channel 2

Channel 3

Channel 4

Connect to plug housing

W802-4Rev.E Single frequency , split beam termination

Forward

StarboardPort

Sections seen from topof the transducer

2

1

3

4

2 1

3 4

White Blue

White Blue Blue

Orange

Green

Brown

White

White

White

White

White Blue

White Blue

Black Black

Black Black

Black Black

Black Black

Screen

Alternative cablecolours

307324/B 37

Simrad ES70-7C

General Purpose Transceiver (GPT)transducer plug assembly

Rubber sleeve

Rubber sleeve

Retaining ringContact body

Plugfastening ring

Upper plug case

Bottom capand cable clamp

Washers

Heat-shrinkable tubing

Lower plug case

Outer screen together with inner screen.Drain wire, fold back over jacketand temporary fastened with tape.

Outer screen and inner screen braid wireuntaped and spread out under washer

CD010219A Page 1 of 1824-201575 Rev .C

Note:All measurements are in mm.The drawing is not in scale.

38 307324/B

Drawing file

Outline dimensions and installation drawingsNote

Observe the 32 Nm torque when the transducer is mounted usingthe mounting and clamping rings.

Observe the 17 Nm maximum torque when the transducer ismounted using the threaded inserts on the transducer body .

Topics

• Outline dimensions [204603] on page 40• Recommended arrangement [204678] on page 41• Mounting ring [204716] on page 43• Clamping ring [204718] on page 45

307324/B 39

Simrad ES70-7C

Outline dimensions [204603]

ø250

125

80ø24

ø280

85,2

R1

M8, depth 12 mm

70,2

R1R5

Guide cam

Forward

ø130

CD017019E Page 1 of 1834-204603 Rev .A


Maximum tightening torque (M8): 17 nM

Radii without dimensions are 2.5 mm

Weight with cable: 9 kg

40 307324/B

Drawing file

Recommended arrangement [204678]

307324/B 41

Simrad ES70-7C

42 307324/B

Drawing file

Mounting ring [204716]

30°

60°ø0.2

M10Self locking

(6 holes)

298

A

A

CD017019D Page 1 of 2871-204716 Rev .A


Material:Steel tube, ST .52-3N (DIN 17121), ø343/ø164

Surface treatment:Sand blasted to SA 2.5, one coating of red ferric oxide primer

M10 Self-lock taps:Refer to specific description. Self-lock taps can be provided by Simrad.

307324/B 43

Simrad ES70-7C

R0.75(max)

R0.5

Chamfer3x45°

45°

95 ±1ø3

40 ±

1

ø164

±1

ø326

±1

20 ±2

30 ±1

0.075

6.3

70 +0.1/-0

ø322

+0.

5/-0

ø281

+0.

5/-0

15 +0.3/-0

A - A

CD017019D Page 2 of 2871-204716 Rev .A


44 307324/B

Drawing file

Clamping ring [204718]

125±0.1

298

R5.5

A

A

R1

ø11ø0.2

30°

60°

CD017019C Page 1 of 2871-204718 Rev .A


307324/B 45

Simrad ES70-7C

R0.5

R0.5

R1.5

ø18

15

10

6.3

ø320

+0.

5/-0

ø251

+0.

5/-0

A-A

CD017019C Page 2 of 2871-204718 Rev .A


46 307324/B

Index

Index

AAbout, 5information in thismanual, 5

Acoustic windowexample, 21installation, 20

Additional information, 5Air outletexample, 13, 15

Anti-foulingpaint, 31

Approvalmaritime authorities, 5

Arrangementdrawing, 41

BBlisterCommon guidelines, 16installation, 12physical location, 17toe-in, 16

Boundary water layer, 8Bow thrustersnoise, 9

Box keelexample, 18installation, 17

CCabletransducer, splicing, 29

Cable glandabout, 25GRP hull, 27small hull, 28steel hull, 26wooden hull, 27

Clamping ringblister, 12drawing, 45example, 13

Clamping rings, 12, 17,19–20, 22Common guidelinesblister, 16

Conduitsteel, 30

DDiametersteel conduit, 30

Dimensionsdrawing, 40

Drawingarrangement, 41Clamping ring, 45GPT Transducer plug, 38mounting arrangement, 41Mounting ring, 43outline dimensions, 40

Drawing file, 36Drop keelinstallation, 23

EEMC interference, 30Emuge, 32ExampleAcoustic window, 21Air outlet, 13, 15box keel, 18Clamping ring, 13flush mounting, 20Inside the hull, 22Mounting ring, 13, 15Streamlined blister, 13, 15

FFlush mountingexample, 20steel tanl, 19

GGPT Transducer plugdrawing, 38

GRP hullcable gland, 27

HHandling, 31Handling rules, 31Heat, excessivedo NOT expose, 31

Hull unitinstallation, 24

IInclinationangle, 9

Inside the hullexample, 22installation, 21

Installationdrawings, 6, 36hardware, 6responsibility, 6

Installation methodAcoustic window, 20Blister, 12Box keel, 17Drop keel, 23Flush mounting, 19Hull unit, 24Inside the hull, 21Retractable, 24Steel tank, 19

Introduction, 6

LLifting, 31Locationrecommendation, 10

MMaintenance, 31Maritime authoritiesapproval, 5

Mounting arrangementdrawing, 41

Mounting ringblister, 12drawing, 43example, 13, 15

Mounting rings, 12, 17,19–20, 22

NNoiseboundary water layers, 8bow thrusters, 9propeller, 9protruding objects, 7

OOrder numbertransducer, 6

Outline dimensionsdrawing, 40

PPaintanti-fouling, 31

Physical dimensions

307324/B 47

Simrad ES70-7C

drawing, 40Physical locationblister, 17

Propellernoise, 9

Protruding objects, 7Purposethis manual, 5

RRetractableinstallation, 24

SSelf-locking taps, 32Shieldingsteel conduit, 30

Simrad website, 5Smooth surface, 12, 18–20, 22Splicingtransducer cable, 29

Steel conduitdiameter, 30qualities, 30shielding, 30why, 30

Steel hullcable gland, 26

Steel tankflush mounting, 19

Streamlined blisterexample, 13, 15

Sunlightdo NOT expose, 31

Support bar, 12, 18–19Surfacesmooth, 12, 18–20, 22

TTaps, self-locking, 32Toe-inblister, 16

Transducerlifting, 31order number, 6recommended location, 10

Transducer cablesplicing, 29

Transducer plugdrawing, 38

WWooden hullcable gland, 27

48 307324/B

Index

307324/B 49

ISBN-13: 978-82-8066-080-0©2009 Kongsberg Maritime AS

Ko n g s b e r g M a r it im e A SS t ra n d p r o m e n a d e n 5 0P. O. Bo x 1 1 1N- 3 1 9 1 H o r t e n , N o r wa y

S im r a d

Te le p h o n e : + 4 7 3 3 0 3 4 0 0 0Te le fa x : + 4 7 3 3 0 4 2 9 8 7

co n t a c t @s im ra d . co mw w w . s im r a d . c o m

Simrad ES70-7C 70 kHz split-beam transducer · SimradES70-7C...

Documents

Transcript of Simrad ES70-7C 70 kHz split-beam transducer · SimradES70-7C...