Simrad ES38-12 DATASHEET

Installation manual
TECHNOLOGY FOR SUSTAINABLE FISHERIES
www.simrad.com
Simrad ES38-12 38 kHz split-beam transducer
SimradES38-12
Thisdocumentprovidesageneraldescriptionofhowto installtheSimradES38-12Splitbeamtransducer.The informationmustberegardedasgeneralguidelinesand recommendationsonly.Theinstallationshipyardmust designandmanufactureinstallationhardwaretotthe ES38-12transduceroneachindividualvessel.
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17.02.2010
©
KongsbergMaritimeAS
Documenthistory
Simraddocumentnumber:344276/ISBN-13:978-82-8066-119-7/Currentrevision:A
Rev.A15.022010
Copyright
©2010KongsbergMaritimeAS TheinformationcontainedinthisdocumentremainsthesolepropertyofKongsbergMaritimeAS.Nopart ofthisdocumentmaybecopiedorreproducedinanyformorbyanymeans,andtheinformationcontained withinitisnottobecommunicatedtoathirdparty,withoutthepriorwrittenconsentofKongsberg MaritimeAS.Thedocument,oranypartofit,maynotbetranslatedtoanyotherlanguagewithoutthe writtenapprovalfromKongsbergMaritimeAS.
Firstversion.
Disclaimer
KongsbergMaritimeASendeavourstoensurethatallinformationinthisdocumentiscorrectandfairly stated,butdoesnotacceptliabilityforanyerrorsoromissions.
Warning
Theequipmenttowhichthismanualappliesmustonlybeusedforthepurposeforwhichit wasdesigned.Improperuseormaintenancemaycausedamagetotheequipmentand/orinjury topersonnel.Theusermustbefamiliarwiththecontentsoftheappropriatemanualsbefore attemptingtoinstall,operateorworkontheequipment. KongsbergMaritimeASdisclaimsanyresponsibilityfordamageorinjurycausedbyimproper installation,useormaintenanceoftheequipment.
Supportinformation
Ifyourequiremaintenanceorrepair,contactyourlocaldealer.Youcanalsocontactususingthefollowing address:contact@simrad.com.Ifyouneedinformationaboutourotherproducts,visitourwebsite.On thewebsiteyouwillalsondalistofourdealersanddistributors.
KongsbergMaritimeAS
www.kongsberg.com
Installationmanual

Tableofcontents

ABOUTTHISMANUAL.......................................................5
SIMRADES38-12..............................................................6
WHERETOMOUNTTHETRANSDUCER...............................7
HOWTOINSTALLTHETRANSDUCER..............................11
Transducerinstallationinblister............................................................................11
Useamountingplatewheneverprovided.....................................................11
Smoothsurfaceisimportant........................................................................11
Example:Largecirculartransducer..............................................................12
Example:Mediumandlargetransducers,principle.......................................13
Example:Mediumandlargetransducers,detail............................................13
Commonguidelines....................................................................................14
Toe-in........................................................................................................14
Physicallocation.........................................................................................14
Transducerinstallationinboxkeel.........................................................................15
Usemountingplatewheneverprovided........................................................15
Smoothsurfaceisimportant........................................................................15
Example:Boxkeelinstallation....................................................................16
Transducerushmountedinasteeltank...............................................................16
Usemountingplatewheneverprovided........................................................16
Smoothsurfaceisimportant........................................................................16
Waterlled.................................................................................................16
Example:Flushmountinginasteeltank......................................................17
Transducerwithacousticwindow..........................................................................17
Usemountingplatewheneverprovided........................................................17
Smoothsurfaceisimportant........................................................................17
Example:Acousticwindow.........................................................................18
Transducermountedinsidethehull.......................................................................18
Usemountingplatewheneverprovided........................................................18
Smoothsurfaceisimportant........................................................................18
Example:Mountinginsidethehull..............................................................19
Transducermountedonadropkeel.......................................................................19
Retractabletransducer............................................................................................20
TOWEDBODYINSTALLATION.........................................21
Generalrequirements.............................................................................................21
Smoothsurfaceisimportant........................................................................21
Usemountingandclampingringswheneverprovided...................................21
Useamountingplatewheneverprovided.....................................................21
Installationinatowedbody...................................................................................22
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SimradES38-12
Example:Smalltransducer..........................................................................23
Example:Mediumandlargetransducers......................................................23
Example:Dualtransducerarrangement........................................................24
STEELCONDUIT..............................................................25
TRANSDUCERHANDLINGANDMAINTENANCE................26
Rulesfortransducerhandling.................................................................................26
Rulesfortransducermaintenance..........................................................................27
Approvedanti-foulingpaintsfortransducers.........................................................28
Usingself-lockingtaps...........................................................................................28
IntroductiontoEmugeself-lockingthreads...................................................29
Drawingstandard........................................................................................30
Tapsandgauges..........................................................................................30
Self-locktapsprovidedbySimrad...............................................................31
Supplierandmanufacturer...........................................................................31
TRANSDUCERCABLESPLICING.......................................32
DRAWINGFILE...............................................................33
Echosounderconnections......................................................................................33
Splicingthetransducercable.......................................................................33
GeneralPurposeTransceiver(GPT)wiring...................................................34
GeneralPurposeTransceiver(GPT)transducerplugassembly.......................35
ES38-12Outlinedimensionsandinstallationdrawings.........................................36
Outlinedimensions[111337].......................................................................37
Mountingplate[111492].............................................................................38
Installationprinciples[111495]....................................................................39
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Aboutthismanual

Aboutthismanual
Purpose
Thepurposeofthisinstallationmanualistoprovidethegenericdescriptionsand illustrationsthatallowsyoutounderstandthebasicprinciplesforechosounder transducerinstallation.
Abouttheinformationprovidedinthisdocument
Theinformationinthisdocumentmustberegardedasgeneralguidelinesand recommendationsonly.Theinstallationshipyardmustdesignandmanufacture installationhardwaretoteachindividualtransducerandvessel.
Approvalbymaritimeauthorities
Wheneverrequired,theinstallationshipyardmustalsohavetheinstallationapprovedby theapplicablemaritimeauthorities.
Additionalinformation
Foradditionaldetailedinformationaboutthetransducertobeinstalled,refertothe documentationprovidedwiththetransducer.Drawingsanddescriptionscanalsobe obtainedfromh
t t p : / / w w w . s i m r a d . c o m .
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SimradES38-12

SimradES38-12
Thepurposeofthismanualistheprovidethebasicinformationrequiredtoinstallthe SimradES38-12Splitbeamtransducer.
Transduceranddocuments
•SimradES38-12:KSV-111497
•Datasheet:164276
•Drawings:
–Outlinedimensions:111337
–Mountingplate:111492
–Installationprinciples:111495
Note
Althoughdrawingsareprovidedtoexplaintheinstallationprinciples,theinstallation shipyardmustprovidethenaldrawingsrequiredtotthetransducertoeach individualvessel.Also,whenapplicable,theinstallationshipyardmusthavethe drawingsandinstallationapprovedbythepropermaritimeauthorities.
ThedrawingsspecicfortheES38-12transducerarelocatedintheDrawingleon page33.
Technicalspecications
RefertotheSimradES38-12datasheet.Youcanreadand/ordownloadthedatasheeton
t t p : / / w w w . s i m r a d . c o m .
h
Additionalpartsprovidedforinstallation
ThefollowingitemscanbesuppliedbySimradtofacilitateinstallation.Theitems mustbeorderedseparately.
•Mountingplate:499–111492
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Wheretomountthetransducer

Wheretomountthe
transducer
Asingleanswertothequestionwheretolocatethetransducercannotbegiven.It dependsverymuchonthevessel’sconstruction,howthehullisshapedandhowthe waterrunsalongthehull.Therearehoweveranumberofimportantguidelines,and someoftheseareevenconicting.
Mountthetransducerdeep
Mountthetransduceratadeeppositiononthehull.Considerthesituationswhenthe vesselisunloaded,andwhenitispitchinginheavyseas.
Thereareseveralreasonsforthis.
1Theupperwaterlayersoftheseacontainamyriadofsmallairbubblescreatedbythe
breakingwaves.Inheavyseastheupper5to10metresmaybelledwithair,and thehighestconcentrationswillbenearthesurface.Airbubblesabsorbandreectthe soundenergy,andtheymayinworstcasesblockthesoundtransmissionaltogether.
2Anotherreasontogodeepisthecavitationinfrontofhighpowertransducers.
Cavitationistheformationofsmallbubblesinthewaterduetotheresultinglocal pressurebecomingnegativeduringpartsoftheacousticpressurecycles.The cavitationthresholdincreaseswiththehydrostaticpressure.
3Thetransducermustneverbeliftedfreeofthewatersurface.Transmittinginto
openairmaydamagethetransducerbeyondrepair.Mountingthetransducerata deeppositiononthehullpreventsthis.
4Ifthetransducerisliftedupfromthewaterduringheavyseas,itmaybedamaged
whenthehullstrikesbackattheseasurface.Thisisespeciallyimportantforlow frequencytransducerswithlargefaces.
Mountthetransducerawayfromprotrudingobjectsonthehull
Objectsprotrudingfromthehull,suchaszincanodes,sonartransducersoreventhe vessel’skeel,generateturbulenceandownoise.Holesandpipeoutletsarealso importantnoisesources.Theymayactasresonantcavitiesamplifyingtheownoise atcertainfrequencies.Donotplaceanechosoundertransducerinthevicinityofsuch objects,andespeciallynotclosebehindthem.Forthesamereason,itisveryimportant
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thatthehullareaaroundthetransducerfaceisassmoothandlevelaspossible.Even tracesofsealingcompound,sharpedges,protrudingboltsorboltholeswithoutlling compoundwillcreatenoise.
Mountthetransducerattheforwardpartofthehulltominimisetheeffectsfrom theboundarywaterlayer
Whenthevesselforcesitswaythroughthesea,thefrictionbetweenthehullandthe watercreatesaboundarylayer.Thethicknessoftheboundarylayerdependsuponvessel speedandtheroughnessofthehull.Objectsprotrudingfromthehull,anddentsinthe hull,disturbtheowandincreasethethicknessoftheboundarylayer.Theowinthis boundarylayermaybelaminarorturbulent.Alaminarowisanicelyordered,parallel movementofthewater.Aturbulentowhasadisorderlypattern,fullofeddies.The boundarylayerincreasesinthicknesswhentheowgoesfromlaminartoturbulent.The gurebelowillustratestheboundarylayerofavesselmovingthroughthewater.
Furthermore,airbubblesintheseawaterarepresseddownbelowthehullandmixed intotheboundarylayer.Theboundarylayeristhinunderneaththeforwardpartofthe vessel,andincreasesinthicknessasitmovestowardsaft.Ifthesidesofthehullare steep,someoftheairbubblesintheboundarylayermayescapetotheseasurfacealong thevesselsides.Itisourexperiencethatawideandatbottom,witharisingangleless thanaround13degrees,ispronetogivingairproblemsforthetransducer.Inanycasea transducerlocationintheforwardpartofthehullispreferredinordertominimisethe inuenceoftheboundarylayer.
Figure1Boundarywaterlayer
ATurbulentow
BLaminarow
CAirbubblesinthewater
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Wheretomountthetransducer
Mountthetransducerfarawayfromthepropellers
Thepropulsionpropelleristhedominantnoisesourceonmostshingvessels,research vessels,merchantvesselsandpleasurecrafts.Thenoiseistransmittedthroughthesea water.Forthisreason,thetransducershouldbeplacedfarawayfromthepropeller, whichmeansontheforepartofthehull.Positionsoutsidethedirectlineofsightfrom thepropellerarefavourable.Onsmallvesselswithshortdistancesitisadvisedtomount thetransduceronthatsideofthekeelwherethepropellerbladesmoveupwards,because thepropellercavitationisstrongestontheotherside.Thecavitationstartsmosteasily whenthewaterowsinthesamedirectionasthepropellerblade,andthatistosome degreethecaseatthatsideofthekeelwherethepropellerbladesmovedownwards.
Mountthetransducerfarawayfromthebowthrusters
Bowthrusterpropellersareextremelynoisy.Wheninoperation,thenoiseandcavitation bubblescreatedbythethrustermaketheechosounderuseless,almostnomatterwhere thetransducerisinstalled.Andwhennotinoperation,thetunnelcreatesturbulence, andifthevesselispitching,thetunnelmaybelledwithairoraeratedwaterinthe upperpositionandreleasethisinthelowerposition.Ingeneral,alltransducersmust bethereforeplacedwellawayfromthebowthruster.However,thisisnotaninvariable rule.Certainthrusterdesignscombinedwithitsphysicallocationonthehullmaystill offersuitabletransducerlocationsnearthethruster.Ifyouareindoubt,consultanaval architect.
Mountthetransducerwithaslightlyinclinedtransducerface
Ideally,thetransducerfaceshouldbemountedinparallelwiththeseasurfacewhen thevesselisinnormaltrim,asthiswillprovidethemostaccurateechoinformation. However,itisalsoveryimportantthatthew
a t e r o w overthetransducerfaceislaminar. Inordertoensurelaminarow ,thetransducerfacemaybetiltedslightlyupwardsin relationtothewaterow.Thisallowstheowingwatertomeetthefacedirectly,and assureslaminarow.Theinclinationanglemusthoweverbedeterminedcarefully.The anglemustbesmallontransducerswithnarrowbeamangles.Asaruleofthumb,mount transducerswithbeamanglessmallerthansevendegreeswithminimuminclination angle.Thesmallerbeamangleyourtransducerhas,thesmallertheinclinationanglecan be.Ensurethatyoudonotmountthetransducerwithanegativeinclinationangle.This maycauseturbulenceunderthetransducerface,andreducedechosounderperformance.
Summaryandgeneralrecommendations
Someoftheaboveguidelinesareconicting,andeachcasehastobetreatedindividually inordertondthebestcompromise.Generallythepropellernoiseisthedominantfactor, andarecommendedtransducerlocationisintheforepartofthehull,withmaximum distancefromthebowequaltoonethirdofthetotallengthofthehullatthewaterline.
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SimradES38-12
Figure2Generalrecommendationfortransducerlocation
ATransducer
BInclinationangle
CHulllengthat
waterline
DMaximum1/3of
thehulllengthat waterline(C)
Ifthevesselhullhasabulbousbow,thismaywellbeagoodtransducerlocation,but alsoheremustbetakenintoconsiderationtheowpatternoftheaeratedwater.Often theforemostpartofthebulbispreferable.
Figure3Recommendedlocationofthetransducer onabulboushull
AThruster
BTransducerlocation
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Howtoinstallthetransducer

Howtoinstallthetransducer
Therearemanydifferentwaystomountthetransducer.Thesearetherecommended methodstomountalargeandmediumsizedtransducerusingamountingplate.
Topics
Transducerinstallationinblisteronpage11
Transducerinstallationinboxkeelonpage15
Transducerushmountedinasteeltankonpage16
Transducerwithacousticwindowonpage17
Transducermountedinsidethehullonpage18
Transducermountedonadropkeelonpage19
Retractabletransduceronpage20

Transducerinstallationinblister

Onerecommendedtransducerinstallationmethodisbymeansofablister.Theblister mustbedesignedandmanufacturedbytheinstallationshipyardtotboththetransducer body,andthevessel’ssizeandhullshape.

Useamountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.
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SimradES38-12

Example:Largecirculartransducer

Theillustrationbelowshowsatypicaltransducerblisterdesignedforalargetransducer. Notethatduetothephysicalsizeofthetransducer,aU-shapedsupportbar(E)isused tosupportthetransducer.Thepurposeofthissupportistopreventthetransducerfrom beingpushedupintotheblisterinheavyseas.
Figure4Largecirculartransducer
AStreamlinedblister
BStiffeningrib
CDrainageholes
DInclinationangle
EU-shapedsupportbar(recommended
onlargetransducers)
FForward
GCableserviceloop
HStufngtube
IMinimum400mm
JRoundedcorners
KAiroutlet
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Example:Mediumandlargetransducers,principle

Howtoinstallthetransducer
Figure5Mediumandlargetransducers usingmountingplate
Thisillustrationshowsthe installationprincipleofamedium orlargetransducerusingamounting plate.
AAiroutlet
BStreamlinedblister
CTransducercable
DTransducer
EMountingplate
FForward

Example:Mediumandlargetransducers,detail

Figure6Installationprinciple, mediumandlargetransducers
AMountingring/plate
BHullplatingontowedbody
CTransducer
D“Clampingring”functionality
facilitatedbytransducerbody
EBolt
Thisillustrationshowstheinstallation principleofamediumorlargetransducers usingamountingringor-plate.Note thataclampingringisnotrequired,asthe transducerbodyisshapedtofacilitatethis function.
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SimradES38-12

Commonguidelines

Thebestperformanceisobtainedwithablisterheightof40cmormore.Astreamlined shapeandroundededgesreducetheownoise.Averticalleadingedgeorfrontwill guidetheaeratedwatertothesidesoftheblister.Theorientationoftheblistershould followthewaterow.
Theinterioroftheblistermustbelledwithseawater.Usedrainageholesinthe bottomandanairoutletonthetop.Thewaterpressurebehindthetransducerwillthen compensatefortheoutsidepressureduringvesselmovementsinroughsea.
WerecommendthatlargediametertransducersarettedwithahorizontalU-shaped supportbar.Thisbarcanthenbesecuredtothemountingringusingthreadedrods.
Thetransducercablepenetratesthehullinastufngtube.Leaveanadequateloopofthe cablebehindthetransducerforeasymountingorremovalofthetransducer.

Toe-in

Figure7T oe-inprinciple
towardsthebow.
Theanglemustbechosentoallowformostefcientwaterow.Itwillvarywiththe locationofthetransducer;thedepthbelowthehull,thedistancefromthebow,andthe distancetothekeel.Typicalanglesarefrom0to3°ondeplacementhulls.Onplaning hulls,theangleisnormallycloseto0°.
AKeel
BBlister
CT oe-inangle
Theprimaryconsiderationmustbetoallow laminarwaterow.Inmostcasesthisis achievedbydesigningtheblisterinparallel withthekeel.However,iftheblisteris locatedclosetothebow,thefrontofthe blistermayhaveafewdegreestoe-in

Physicallocation

Theblisterisplacedononeofthesidesofthehull,andthedistancefromthekeelisa tradeoffbetweenaclosedistancegivingaturbulentowofwaterinanarrowpassage, andalargedistancebringingthetransducerhigherupandalsomoreaffectedbyvessel roll.Normallyadistanceofapproximately1misagoodcompromise.
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Howtoinstallthetransducer
Figure8Physicallocationofblister AKeel
BTransducerblister
CHorizontaldistancebetweenkeeland
blister
DV erticaldistancebetweentheblister
surfaceandthekeel
Observethehorizontalandvertical distances(CandD)betweenthekeeland thetransducerblister.Onamediumsized
vessel,thehorizontaldistance(C)should beapproximately1meter.Theverticaldistance(D)mustingeneralbeassmallas possible.Thisisimportanttopreventthekeelfromshadowingthetransducerbeam inshallowwaters.

Transducerinstallationinboxkeel

Vesselswithaboxkeelmayusethisfortransducerinstallation.
Theboxkeelisalreadythedeepestpartofthevessel.Iftheboxkeelistoonarrowto accommodatethetransducer,itcanbewidened,eithersymmetricallyortoonesideonly. Inthelastcasetheinstallationcouldalsobedescribedasablistermergedintothekeel.

Usemountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.
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SimradES38-12

Example:Boxkeelinstallation

Figure9Boxkeelinstallation
Thegureillustratesa symmetricalboxkeelinstallation.
ABoxkeel
BU-shapedsupportbar
(onlyrecommendedonlarge transducers)
CStufngtube
DCableinsteelconduit
ECableserviceloop
Transducerushmountedinasteeltank
Flushmountingisusedonverylargevesselswithahullsodeepthatnoairbubblesare foundbelowthehull,andonvesselsoperatinginshallowharboursorwaters,where aprotrudingblistercannotbeaccepted.
Thestandardprocedureforushmountingonasteelvesselistoweldasteeltankinside thehull,andmountthetransducerintothistank.

Usemountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.
Waterlled
Asforablister,theinteriorofthetankmustbelledwithwater.
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Howtoinstallthetransducer
Thiscanbeaccomplishedbyairreleasethroughasteeltube,whichisextendedeither toopenair1.5mabovethewaterlineortothewateroutsidethehullatapointhigher thanthetankinterior.
Ifthetubeisextendedtoopenair,drainagemustbeprovidedwithleakageatthe transducerangeoraseparateholeinthetankbottom.

Example:Flushmountinginasteeltank

Figure10Flushmountinginasteeltank
ASteeltank
BWater
CDrainagehole
DCableserviceloop
ESteeltubeforairoutlet
FStufngtube
GCableinsteelconduit
Thegureillustratesthe installationprincipleswhenthe transducerismountedinasteel tank.

Transducerwithacousticwindow

Vesselsoperatinginarcticwatersneedspecialattentionontransducerinstallation. Floatingblocksoficemaydamageevenaushmountedtransducerface.Forthis situationSimradoffersarctictanksindifferentsizes.

Usemountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.
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SimradES38-12

Example:Acousticwindow

Figure11Acousticwindow
polycarbonate.Thetankislledwithoil.
ASteeltank
BOil
CAcousticwindow
DCableserviceloop
EStufngtube
FCableinsteelconduit
GOilinlet
Thetransducershowninthegureis mountedinsidethetankbehindastrong acousticwindow.
Thewindowistypicallymadeof

Transducermountedinsidethehull

Thetransducercanalsobemountedinsidethehull.
Aninstallationofthetransducerinsidethehull,andsoundingthroughthehull,requiresa goodacousticcontactbetweenthetransducerfaceandthehull.Buildatankaroundthe transducerandllitwithaliquid.Oilusedinhydraulicsystemsisawellsuitedliquid forthispurpose.Itcontainsnogasbubblesandisnon-corrosive.
Typicalvaluesofthetwowaylossare3dBforpolyester,6dBforaluminiumand10dB forsteel.Hullsmadeofwoodorasandwichtypewithfoaminthemiddle,attenuate thesoundsomuchthatthroughhullsoundingmustberegardedasimpossible.Theloss varieswiththedistancebetweentransducerfaceandthehull.Thebestresultisobtained whenthedistanceishalfawavelength.ConsultSimradforadvice.Inadditiontothe loss,thebeampatternisdegraded,becausealargerareaofthehullissetintovibrations.

Usemountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
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Howtoinstallthetransducer
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.

Example:Mountinginsidethehull

Figure12Mountinginsidethehull
Thetransducershowninthegureismountedinsidethehull.Thetankislledwithoil.
ASteeltank
BOil
CHullplating
DCableserviceloop
EStufngtube
FCableinsteelconduit
GHoleforoillling
HAiroutlet

Transducermountedonadropkeel

Theuseofadropkeelwiththepurposeofstabilisingthevesseliswellknown.
Figure13Dropkeelinstallation
AInstrumentkeel
shaft
BLoweredposition
CBottomview
Adropkeelisalso asuperiorplatform forechosounder transducers.Such instrumentkeelshave beenbuilt,mainlyon researchvessels,often protrudingasfaras threemetersbelowthe
hull.Atthatdepth,the waterisfreeofairbubblesuptoveryhighseastates.Thevesselisthenabletoperform reliableacousticmeasurementsinopenseaalargerpartoftheyear.
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SimradES38-12

Retractabletransducer

Hullunitsallowingthetransducertobeloweredandhoistedarecommonlyusedfor horizontallookingsonars.Whennotinuse,thetransducerisretractedintoatrunk.
Figure14Retractable transducer
ATransducer
BTrunk
CTransducershaft
DTransducershaftsleeve
EKeel
Theretractablehullunitismoreexpensivethan ablister,butonvesselswithahullwhereitis difcultorimpossibletoinstallablister,itmay stillbeworthwhile.Theprinciplesofahullunit witharetractabletransducerisshownbelow.
Vesselswithoutakeelandwithawide,atbottom isanexamplewherearetractablehullunitcanbe theonlyacceptablemethodforbringingtheecho soundertransducerbelowtheboundarylayer.
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Towedbodyinstallation

Towedbodyinstallation
Thesearetherecommendedmethodstomounttransducersinatowedbody.
Topics
Generalrequirementsonpage21
Installationinatowedbodyonpage22

Generalrequirements

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthetransducerorthearea immediatelyaroundit.
Makesurethatthesurfaceofthetransducerface,theinstallationhardwareusedtomount it,thehullplatingandtheputtyaroundthetransducerisasevenandsmoothaspossible. Obstructionsonthesesurfaceswillcreateproblemswithturbulentow.

Usemountingandclampingringswheneverprovided

Circulartransducersmaybeprovidedwithmountingandclampingrings,orwith drawingstoallowforlocalproductionofthese.
Themountingringisweldedtotheholepreparedforthetransducer,whiletheclamping ringtsaroundtheedgeofthetransducerbody.Boltsthroughtheclampingringintothe mountingringwillsecurethetransducerbetweenthem.
Notethatseveraltransducersusedirectionguidestoallowcorrectmounting.

Useamountingplatewheneverprovided

Certaintransducersmaybeprovidedwithamountingplate,orwithdrawingstoallow forlocalproductionofthis.
Themountingplateisweldedtotheholepreparedforthetransducer.Boltsthroughthe transducerbodyintothemountingplatewillsecurethetransducer.
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SimradES38-12

Installationinatowedbody

Transducersdesignedtowithstandlargewaterpressureareprovidedforuseintowed bodies.
Therecommendedinstallationmethodisthroughthehullplatinghullusingamounting plate,orwithmountingandclampingrings.Theinstallationarrangementonthetowed bodymustbedesignedbythemanufacturerofthetowedbodytotitsshapeand characteristics.
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Example:Smalltransducer

Towedbodyinstallation
Figure15Smalltransducerwith mountingandclampingrings
AMountingring
BHullplatingontowedbody
CTransducer
DClampingring
EBolt
Thisillustrationshowstheinstallation principleofasmallcirculartransducerusing clampingandmountingrings.

Example:Mediumandlargetransducers

Figure16Installationprinciple, mediumandlargetransducers
AMountingring/plate
BHullplatingontowedbody
CTransducer
D“Clampingring”functionality
facilitatedbytransducerbody
EBolt
Thisillustrationshowstheinstallation principleofamediumorlargetransducers usingamountingringor-plate.Note thataclampingringisnotrequired,asthe transducerbodyisshapedtofacilitatethis function.
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SimradES38-12

Example:Dualtransducerarrangement

Figure17Dualtransducerarrangement
Thisillustrationshows atypicalthroughthehull installationofsmalland largecirculartransducers onatowedbody.
ASmalltransducer
BMediumorlarger
transducer
CElectronic
equipmentin watertight compartment
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Steelconduit
Whyusesteelconduits?
Itisstronglyrecommendedtolayasteelconduitfromthetransducer’scablegland totheechosoundertransceiver,andtopullthetransducercablethroughthisconduit. Thereareseveralreasonsforthis.
•Itwillmakeiteasieratalaterstagetoreplacethetransducer.

Steelconduit

•Noiseandinterferencefromotherelectricalequipmentisgreatlyreduced.
•Theriskofoodingisgreatlyreducedifthepipeisterminateabovethewaterline.
WithasteelconduittheinstallationwillsatisfytheEUregulationsforEMCinterference. Withoutasteelconduit,thereisariskofreducedechosounderperformance.
Steelconduitsqualitiesandshielding
Thesteelconduitmustbeunbrokenandwatertightfromthetransducertoabovethe waterline.Fromthere,thecablecanbepulledfurther,orajunctionboxcanbeinstalled tofacilitatefurtherconnections.Notethatthesteelconduitmustactasacontinuous electricalscreenalltheway. Steelconduitdimensions:
•minimum35mminnerdiameter
•minimum6mmwallthickness(4.5mmifgalvanised)
Morethatonetransducercable?
Iftwoormoretransducersareinstalledclosetoeachotheritispossibletopulltheir cablesinthesamesteelconduit,providedtheconduitdiameterisincreasedaccordingly. However,foreasyreplacementitisrecommendedthateachtransducerhasitsown steelconduit.
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SimradES38-12
Transducerhandlingand
maintenance
YouMUSTobservethefollowingrulesforhandling,maintenanceandpainting.
Topics
Rulesfortransducerhandlingonpage26
Rulesfortransducermaintenanceonpage27
Approvedanti-foulingpaintsfortransducersonpage28
Usingself-lockingtapsonpage28

Rulesfortransducerhandling

Note
Donotliftthetransducerbythecable.
Donotexposethetransducertodirectsunlight.
Donotexposethetransducertoexcessiveheat.
Transportprotection
Sometransducersaredeliveredwithacoverplateonthefaceforprotectionduring transport.Letthisplatestayonaslongaspossible,butdonotforgettoremoveitbefore thevesselgoesintothesea.
Paintingthetransducerface
Ananti-foulingpaintmaybeappliedtothetransducerface.Becausesomepainttypes maybeaggressivetothepolyurethaneinthetransducerface,pleaseconsultSimrad’slist ofapprovedpaints.SeeApprovedanti-foulingpaintsfortransducersonpage28.
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Transducerhandlingandmaintenance
Cleaningthetransducerface
Wheneveropportunityarise,forexamplewhenthevesselisdrydocked,thetransducer facemaybecleanedforshellsandothermarinefouling.B e c a r e f u l n o t t o m a k e c u t s i n t h e t r a n s d u c e r f a c e . Useapieceofsoftwoodoraverynegradeemerypaper.
Specialrulesforacousticwindows
Arctictankshaveacousticwindowsmadeofpolycarbonate.T p a i n t e d n o r c l e a n e d w i t h c h e m i c a l s . Acousticwindowsmustnotbeexposedtodirect sunlight.
h e s e m u s t n e i t h e r b e

Rulesfortransducermaintenance

Onceinstalled,thetransducerismaintenancefree.However,whenthevesselisdocked, itishighlyrecommendedtocleanthetransducerfacetoremovemarinegrowth.
1Performathoroughvisualcheckofthetransducer.
2Ifnecessary,cleanthetransducer
•Tocleanthetransducer,usenormalsyntheticsoapandwater.
•Toremovemarinegrowth,usene-gradesandpaperoremerypaper.
Note
D o n o t usestrongsolvents.
o n o t attempttoscrapeofmarinegrowthwithsheetsofmetal,screwdriversor
D
othermetallictools.
o n o t usehighpressurewatertocleanthetransducer .
D
3Ifnecessary,applyanewlayerofanti-foulingpainttothetransducerface.
Becausesomepainttypesmaybeaggressivetothepolyurethaneinthetransducer face,pleaseconsultSimrad’slistofapprovedpaints.
Approvedanti-foulingpaintsfortransducersonpage28
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SimradES38-12

Approvedanti-foulingpaintsfortransducers

ThisisSimrad’slistofapprovedantifoulingpaintsonpolyurethanetransducerhousing.
Jotun
Headofceaddress:P .O.Box2021,N-3248Sandefjord,Norway
Website:w
1Racing
2Non-stop
3SafeguardUniversalprimer(125micron)withAntifoulingSeaQuantumUltra(125
micron)
4AntifoulingSeaguardian
InternationalMarineCoatings
Address:World-wideofces
Website:w
1Intersleektiecoat+425FCS
•BXA386/BXA390/BXA391Grey
•HKA563/HKA570/HKA571Y ellow
•MixBXA386,BXA390andBXA391rst,thenapply.Whendry,mixHKA563,
2Intersmooth360EcoloexSPC
3MicronExtra
w w . j o t u n . c o m .
w w . i n t e r n a t i o n a l - m a r i n e . c o m .
HKA570andHKA571,apply .
HempelIFACoatings
Headofceaddress:HempelA/S,Lundtoftevej150,Kgs.Lyngby ,DK-2800 Copenhagen,Denmark
Website:w
1HempelA/FClassic76550
Note
Refertothemanufacturer’sdocumentationanddatasheetsforacompleteprocedure.
w w . h e m p e l . c o m .

Usingself-lockingtaps

Screwconnectionsaregenerallymadesothattheycanbeloosenedagain.However, accidentalloosening,especiallyunderdynamicstress,mustbeavoided.Forthisreason itisoftennecessarytouseadditionallockingdevices.Theseareoftenexpensive,they canbeusedonceonly,orreactcriticallytotemperaturechanges.
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Transducerhandlingandmaintenance

IntroductiontoEmugeself-lockingthreads

Emugeself-lockisatapdesignwithanintegratedlockingfeature.Standardmetricbolts
areused.Theinternalthreadprovidesaself-lockingconnection,whichcanbeused repeatedly.Itisnotnecessarytoinvolveasecondarylockingdevice(e.g.chemical, nylonormechanical).TheEmugeself-lockboltswithstandvibrationsbetterthanstandard (metric)threads,becausethethreadcontactstopsthesidewaysmovement.Thespecial designoftheinternalthreadprolealsoprovidesamoreevendistributionofthe tighteningstressoverthewholethreadlength.Theassemblyisjustaseasyaswitha normal(metric)thread.Thereisnogeneralapplicablestandard(e.g.DINstandard) fortheEmugeself-lockthread.
Figure18Example,internalandexternalthreads
AEmuge’ ssaw-toothproleuptopitchP≤0.7mm
BEmuge’ssaw-toothproleuptopitchP≥0.7mm
CStandardthread
1Externalthread
2Internalthread
Advantages
•Thethreadlockingfeatureisintegratedintheinternalthread
•Modiedprolewithrampsurfaceinthedirectionofstress
•30degreerampsurfaceprovidesself-lockingeffect
•Easyassembly
•Noassemblyerrors(forgettingthelockingdevice)possible
•Useofstandardexternalthreads(screws)withtoleranceclass“medium”
•Evendistributionofstressoverthewholethreadlength
•Nostrippingofthreads
•Economicallyefcientlockingsystem,noadditionalcomponentsarenecessary
•Undiminishedholdingpowerevenunderdynamicstress
•Repeatedlooseningandre-tighteningwithoutlossoffunction
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SimradES38-12
•InternalthreadscanbeproducedwithEmugetaps,coldformingtapsorthreadmills
•Largerthreadholediameters,i.e.increasedtoollifeforthreadingtools
•Largertolerancesforthreadholediameters

Drawingstandard

Wheneverself-lockingthreadsarerequired,thisisshownonthetechnicaldrawing. Inthecaseoftappingthroughholes,thearrowattheendofthecenterlineillustrates thescrew-indirectionofthebolt.
Figure19Drawingexamples,self-lockingthread
Thedrawingisnormallyprovidedwiththefollowingtext(orsimilar):
Note:Theself-lockthreadsmarkedwithSL*mustbemadeinaccordancewith procedure842–202125.Drilldiametersforthreadsdifferfromstandard.Self-lock tapscanbesuppliedbySimrad.

Tapsandgauges

Thepretensionlockingthreadself–lock(taps)frommanufacturerEmugemustbeused.
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Transducerhandlingandmaintenance
Figure20Exampleofuse
Note
InthecaseoftappingthroughholesitisimportantthattheproleoftheEmugeself-lock threadsisinthecorrectdirectioncomparedwiththeenteringdirectionofthebolt.
UseEmugeself-lockgauges.Notethatthegaugemustbeusedinthecorrectdirection.

Self-locktapsprovidedbySimrad

Thefollowingself-locktapsareonstockatSimrad,andcanbeorderedfromus.
Threads
M6ø5.2700-078838
M8ø7.0700-078531
M10ø8.8700-078408
M12ø10.7700-078409
M16ø14.5700-078410
Drilldiameterforthreads
Part.no

Supplierandmanufacturer

Norwegiansupplieris:
TingstadAS,P .O.Box83,Kalbakken,0902Oslo,Norway
h
t t p : / / w w w . t i n g s t a d . n o
Manufactureris:
EMUGE-WerkRichardGlimpel,NurnbergerStrasse96-100,D-90607Lauf,Germany
h
t t p : / / w w w . e m u g e . d e
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SimradES38-12

Transducercablesplicing

Ifyouneedtocutorlengthenthetransducercable,youmustspliceitcorrectly.The cablebetweenthejunctionboxandthetransceivermustthenbesuppliedbySimrad, andthismustbethesametypeasusedonthetransducer(s).Tosplicethecable,usea metaljunctionboxwithEMCcableglandsandaterminalblock.Theterminalblock mustprovidesolidfasteningofthecableendsaswellassufcientinsulationbetween thewires.Werecommendthatthecablescreenisconnectedtothejunctionboxchassis usingtheEMCcableglands,butifyoudothis,thejunctionboxchassism connectedtovessel’sground.
u s t n o t be
Note
D o n o t solderthewirestogetherwithonlyelectricaltapeforinsulation.Thiswillresult inelectricalnoiseandreducedoperationalperformance.
o n o t connectthecablescreentothevessel’ sground.
D
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Drawingle
Thischaptercontainsrelevantdrawingsrelatedtotheelectricalandphysicalinstallation oftheSimradES38-12Splitbeamtransducer.
Note
Themechanicaldrawingsareforinformationandguidanceonly.Theyarenotinscale, andmaydifferslightlyfromtheoriginaldrawings.Alldimensionsareinmmunless otherwiseisnoted.
Drawingle
TheoriginalinstallationdrawingsareavailableonPDFand/orDWG(AutoCad)format. Visitw
Topics
Echosounderconnectionsonpage33
ES38-12Outlinedimensionsandinstallationdrawingsonpage36
w w . s i m r a d . c o m todownload.

Echosounderconnections

ObservethefollowinginformationrelatedtoelectricalconnectionoftheES38-12Split beamtransducer.

Splicingthetransducercable

Ifyouneedtosplicethetransducercable,itisveryimportanttousethecorrectcable, andtoavoidgroundloops.Westronglyrecommendtheuseofajunctionbox.Wealso recommendthatyouinstallthetransducercableinasteelconduit.
Formoreinformation,see:
Transducercablesplicingonpage32
Steelconduitonpage25
GeneralPurposeTransceiver(GPT)transducerplugassemblyonpage35
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SimradES38-12

GeneralPurposeT ransceiver(GPT)wiring

ObservethedrawingbelowtoconnecttheSimradES38-12Splitbeamtransducertothe GeneralPurposeTransceiver(GPT).Formoreinformationabouttheseconnections, refertotheapplicableechosounderinstallationmanual.
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GeneralPurposeT ransceiver(GPT)transducerplugassembly

Drawingle
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35
SimradES38-12

ES38-12Outlinedimensionsandinstallation drawings

Note
Whenyoufastenthetransducertothemountingplate,applyLoctite270oneachbolt, andtightentheboltsseveraltimes.Usemaximumtorque32Nm.
Topics
Outlinedimensions[1 11337]onpage37
Mountingplate[1 11492]onpage38
Installationprinciples[1 11495]onpage39
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Outlinedimensions[111337]

Drawingle
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SimradES38-12

Mountingplate[111492]

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Installationprinciples[111495]

Drawingle
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SimradES38-12
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Index
Index
A
About,5
informationinthis
manual,5
Acousticwindow,27
example,18
installation,17 Additionalinformation,5 Airoutlet
example,12 Anti-fouling
paint,28 Approval
maritimeauthorities,5
B
Blister
Commonguidelines,14
installation,11
physicallocation,14 Boundarywaterlayer,8 Bowthrusters
noise,9 Boxkeel
example,16
installation,15
C
Cable
transducer,splicing,32 Clampingring
example,12,23 Clampingrings,21 Cleaning
transducerface,27 Commonguidelines
blister,14 Conduit
steel,25
D
Diameter
steelconduit,25 Dimensions
drawing,37 Drawing
GPTTransducerplug,35
Mountingring,38–39
outlinedimensions,37 Drawingle,33
E
EMCinterference,25 Emuge,29 Example
Acousticwindow,18 Airoutlet,12 boxkeel,16 Clampingring,12,23 ushmounting,17 Insidethehull,19 Mountingplate,13,23 Mountingring,12–13,23 Streamlinedblister,12
F
Flushmounting
example,17 steeltanl,16
G
GeneralPurpose
Transceiver
transducerplug,35 wiring,34
GPT
wiring,34
GPTTransducerplug
drawing,35
Groundloops
avoiding,33
H
Handling,26 Handlingrules
transducer,26
Heat,excessive
doNOTexpose
transducer,26
HempelIFACoatings,28
I
Important
smoothsurface,11,
15–18,21
Inclination
angle,9
Insidethehull
example,19 installation,18
Installation
drawings,6,33
hardware,6 responsibility,6
Installationmethod
Acousticwindow,17 Blister,11 Boxkeel,15 Flushmounting,16 Insidethehull,18 Steeltank,16
InternationalMarine
Coatings,28
Introduction,6
J
Jotun,28 Junctionbox
cablesplicing,33
L
Lifting
transducer,26
Location
recommendation,9
M
Maintenance,26 Maintenancerules
transducer,27
Maritimeauthorities
approval,5
Mountingplate,11,15–18,21
example,13,23
Mountingring
drawing,38–39 example,12–13,23
Mountingrings,21
N
Noise
boundarywaterlayers,8 bowthrusters,9 propeller,9 protrudingobjects,7
O
Ordernumber
transducer,6
Outlinedimensions
drawing,37
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SimradES38-12
P
Paint
anti-fouling,28 Painting
transducerface,26 Physicaldimensions
drawing,37 Physicallocation
blister,14 Propeller
noise,9 Protrudingobjects,7 Purpose
thismanual,5
S
Self-lockingtaps,29 Shielding
steelconduit,25 Simradwebsite,5 Smoothsurface,11,15–18,21 Splicing
transducercable,32–33 Steelconduit
diameter,25
qualities,25
shielding,25
why,25 Steeltank
ushmounting,16
waterlled,16 Streamlinedblister
example,12 Sunlight
doNOTexpose
transducer,26
Surface
smooth,11,15–18,21
splicing,32–33 termination,34
Transducerface
cleaning,27 painting,26
Transducerplug
drawing,35
Transportprotection,26
W
Waterlled
steeltank,16
Wiring
GeneralPurpose
Transceiver,34
T
Taps,self-locking,29 Termination
GPT,34 Toe-in,14 Towedbody
dualtransducer
arrangement,24
Transducer
handling,26
lifting,26
maintenance,27
ordernumber,6
recommendedlocation,9 Transducerarrangement
towedbody,24 Transducercable
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Index
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43
Simraddocumentnumber:344276/V ersionA
ISBN-13:978-82-8066-119-7
©
2010KongsbergMaritimeAS
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