Simrad 38-200 COMBI W DATASHEET

Installation manual

TECHNOLOGY FOR SUSTAINABLE FISHERIES

www.simrad.com

Simrad 38/200 Combi W Dual frequency echo sounder transducer

Simrad38/200CombiW

Installationmanual

Thisdocumentprovidesageneraldescriptionofhow toinstalltheSimrad38/200CombiWDualfrequency transducer.Theinformationmustberegardedasgeneral guidelinesandrecommendationsonly.Theinstallation shipyardmustdesignandmanufactureinstallationhardware totthe38/200CombiWtransduceroneachindividual vessel.

Observethemaximumpowerratingsforthis

transducer!

13October2009

164986/D

Documenthistory

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con t a ct@sim ra d . com

w w w .s im r a d .co m

Documentnumber:164986/ISBN-13:978-82-8066-035-0

Rev.A08.11.04

Rev.B

Rev.C06.06.05

Rev.D

20.05.05

06.10.09

Firstversion.

Addedinformationaboutcableglands.

Correctederrorontheoutlinedimensiondrawingonpage29. Thecorrectouterdiameteris180mm.

Additionalinformationadded.

©2009KongsbergMaritimeAS TheinformationcontainedinthisdocumentremainsthesolepropertyofKongsbergMaritimeAS.Nopart ofthisdocumentmaybecopiedorreproducedinanyformorbyanymeans,andtheinformationcontained withinitisnottobecommunicatedtoathirdparty,withoutthepriorwrittenconsentofKongsberg MaritimeAS.Thedocument,oranypartofit,maynotbetranslatedtoanyotherlanguagewithoutthe writtenapprovalfromKongsbergMaritimeAS.

Disclaimer

KongsbergMaritimeASendeavourstoensurethatallinformationinthisdocumentiscorrectandfairly stated,butdoesnotacceptliabilityforanyerrorsoromissions.

Warning

Theequipmenttowhichthismanualappliesmustonlybeusedforthepurposeforwhichit wasdesigned.Improperuseormaintenancemaycausedamagetotheequipmentand/orinjury topersonnel.Theusermustbefamiliarwiththecontentsoftheappropriatemanualsbefore attemptingtoinstall,operateorworkontheequipment. KongsbergMaritimeASdisclaimsanyresponsibilityfordamageorinjurycausedbyimproper installation,useormaintenanceoftheequipment.

Support

Ifyourequiremaintenanceorrepair,contactyourlocaldealer.Y oucanalsocontactususingthefollowing address:-.Ifyouneedinformationaboutourotherproducts,visitourwebsite.Onthewebsiteyou willalsondalistofourdealersanddistributors.

Installationmanual

Tableofcontents

ABOUTTHISMANUAL.......................................................5

SIMRAD38/200COMBIW................................................6

WHERETOMOUNTTHETRANSDUCER...............................7

HOWTOINSTALLTHETRANSDUCER..............................11

Transducerinstallationinblister............................................................................11

Usemountingandclampingringswheneverprovided...................................11

Smoothsurfaceisimportant........................................................................11

Example:Smallcirculartransducer..............................................................12

Commonguidelines....................................................................................12

Toe-in........................................................................................................13

Physicallocation.........................................................................................13

Transducerinstallationinboxkeel.........................................................................14

Usemountingandclampingringswheneverprovided...................................14

Smoothsurfaceisimportant........................................................................15

Example:Boxkeelinstallation....................................................................15

Transducerushmountedinasteeltank...............................................................15

Usemountingandclampingringswheneverprovided...................................15

Smoothsurfaceisimportant........................................................................16

Waterlled.................................................................................................16

Example:Flushmountinginasteeltank......................................................16

Transducerwithacousticwindow..........................................................................17

Usemountingandclampingringswheneverprovided...................................17

Smoothsurfaceisimportant........................................................................17

Example:Acousticwindow.........................................................................18

Transducermountedinsidethehull.......................................................................18

Usemountingandclampingringswheneverprovided...................................19

Smoothsurfaceisimportant........................................................................19

Example:Mountinginsidethehull..............................................................19

Transducermountedonadropkeel.......................................................................20

Retractabletransducer............................................................................................21

TRANSDUCERCABLEGLANDSANDSPLICING.................22

Aboutcableglands.................................................................................................22

Cableglandforsteelhulls......................................................................................23

CableglandforwoodenandGRPhulls.................................................................24

Cableglandsforsmallhulls...................................................................................25

Transducercablesplicing.......................................................................................26

Ordernumbers........................................................................................................26

STEELCONDUIT..............................................................27

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Simrad38/200CombiW

TRANSDUCERHANDLINGANDMAINTENANCE................28

Rulesfortransducerhandling.................................................................................28

Approvedanti-foulingpaints..................................................................................29

Usingself-lockingtaps...........................................................................................29

IntroductiontoEmugeself-lockingthreads...................................................30

Drawingstandard........................................................................................31

Tapsandgauges..........................................................................................31

Self-locktapsprovidedbySimrad...............................................................32

Supplierandmanufacturer...........................................................................32

DRAWINGFILE...............................................................33

Echosounderconnections......................................................................................33

Splicingthetransducercable.......................................................................33

GeneralPurposeTransceiver(GPT)wiring...................................................34

Transducercablepairs.................................................................................34

GeneralPurposeTransceiver(GPT)transducerplugassembly.......................35

Outlinedimensionsandinstallationdrawings........................................................36

Outlinedimensions[208889].......................................................................37

Mountingring[208846]..............................................................................38

Clampingring[204677]..............................................................................40

Recommendedarrangement[204678]..........................................................42

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ABOUTTHISMANUAL

Aboutthismanual

Purpose

Thepurposeofthisinstallationmanualistoprovidethegeneric descriptionsandillustrationsthatallowsyoutounderstandthe basicprinciplesforechosoundertransducerinstallation.

Caution

Observethemaximumpulsepowerratingforthis transducer:

•38kHz:400W

•200kHz:250W

Maximumcontinuouspowerratingis:

•38kHz:4W

•200kHz:2,5W

DONOTapplymorepowerthantheratedmaximum! Exceedingthepowerinputwillpermanentlydamage thetransducer.

Abouttheinformationprovidedinthisdocument

Theinformationinthisdocumentmustberegardedasgeneral guidelinesandrecommendationsonly.Theinstallationshipyard mustdesignandmanufactureinstallationhardwaretoteach individualtransducerandvessel.

Approvalbymaritimeauthorities

Wheneverrequired,theinstallationshipyardmustalsohavethe installationapprovedbytheapplicablemaritimeauthorities.

Additionalinformation

Foradditionaldetailedinformationaboutthetransducerto beinstalled,refertothedocumentationprovidedwiththe transducer.Drawingsanddescriptionscanalsobeobtainedfrom

t t p : / / w w w . s i m r a d . c o m .

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Simrad38/200CombiW

SIMRAD38/200COMBIW

Thepurposeofthismanualistheprovidethebasicinformation requiredtoinstalltheSimrad38/200CombiWDualfrequency transducer.

Transduceranddocuments

•Simrad38/200CombiW:KSV-208845

•Datasheet:165019

•Drawings:

–Outlinedimensions:834-208889

–Mountingring:499-208846

–Clampingring:820-204677

–Mountingarrangement:820-204678

Note

Althoughdrawingsareprovidedtoexplaintheinstallation principles,theinstallationshipyardmustprovidethenal drawingsrequiredtotthetransducertoeachindividual vessel.Also,whenapplicable,theinstallationshipyardmust havethedrawingsandinstallationapprovedbytheproper maritimeauthorities.Thedrawingsspecicforthe38/200 CombiWtransducerarelocatedintheDrawingleon page33.

Technicalspecications

RefertotheSimrad38/200CombiWdatasheet.Y oucanread and/ordownloadthedatasheetonh t t p : / / w w w . s i m r a d . c o m .

Additionalpartsprovidedforinstallation

ThefollowingitemscanbesuppliedbySimradtofacilitate installation.Theitemsmustbeorderedseparately.

•Mountingring:ES1-208847

•Clampingring:ES1–203672

•Transducercable(forextension):642-078215

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WHERETOMOUNTTHETRANSDUCER

Wheretomountthetransducer

Asingleanswertothequestionwheretolocatethetransducer cannotbegiven.Itdependsverymuchonthevessel’s construction,howthehullisshapedandhowthewaterruns alongthehull.Therearehoweveranumberofimportantguide lines,andsomeoftheseareevenconicting.

Mountthetransducerdeep

Mountthetransduceratadeeppositiononthehull.Considerthe situationswhenthevesselisunloaded,andwhenitispitching inheavyseas.

Thereareseveralreasonsforthis.

1Theupperwaterlayersoftheseacontainamyriadofsmall

airbubblescreatedbythebreakingwaves.Inheavyseasthe upper5to10metresmaybelledwithair,andthehighest concentrationswillbenearthesurface.Airbubblesabsorb andreectthesoundenergy,andtheymayinworstcases blockthesoundtransmissionaltogether.

2Anotherreasontogodeepisthecavitationinfrontof

highpowertransducers.Cavitationistheformationof smallbubblesinthewaterduetotheresultinglocal pressurebecomingnegativeduringpartsoftheacoustic pressurecycles.Thecavitationthresholdincreaseswiththe hydrostaticpressure.

3Thetransducermustneverbeliftedfreeofthewatersurface.

Transmittingintoopenairmaydamagethetransducer beyondrepair.Mountingthetransduceratadeepposition onthehullpreventsthis.

4Ifthetransducerisliftedupfromthewaterduringheavy

seas,itmaybedamagedwhenthehullstrikesbackatthe seasurface.Thisisespeciallyimportantforlowfrequency transducerswithlargefaces.

Mountthetransducerawayfromprotruding objectsonthehull

Objectsprotrudingfromthehull,suchaszincanodes,sonar transducersoreventhevessel’skeel,generateturbulenceand ownoise.Holesandpipeoutletsarealsoimportantnoise sources.Theymayactasresonantcavitiesamplifyingtheow noiseatcertainfrequencies.Donotplaceanechosounder transducerinthevicinityofsuchobjects,andespeciallynot closebehindthem.Forthesamereason,itisveryimportant thatthehullareaaroundthetransducerfaceisassmoothand levelaspossible.Eventracesofsealingcompound,sharpedges, protrudingboltsorboltholeswithoutllingcompoundwill createnoise.

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Simrad38/200CombiW

Figure1Boundarywaterlayer

Mountthetransducerattheforwardpartofthe hulltominimisetheeffectsfromtheboundary waterlayer

Whenthevesselforcesitswaythroughthesea,thefriction betweenthehullandthewatercreatesaboundarylayer.The thicknessoftheboundarylayerdependsuponvesselspeedand theroughnessofthehull.Objectsprotrudingfromthehull,and dentsinthehull,disturbtheowandincreasethethicknessof theboundarylayer.Theowinthisboundarylayermaybe laminarorturbulent.Alaminarowisanicelyordered,parallel movementofthewater.Aturbulentowhasadisorderlypattern, fullofeddies.Theboundarylayerincreasesinthicknesswhenthe owgoesfromlaminartoturbulent.Thegurebelowillustrates theboundarylayerofavesselmovingthroughthewater.

ATurbulentow

BLaminarow

CAirbubblesinthewater

Furthermore,airbubblesintheseawaterarepresseddownbelow thehullandmixedintotheboundarylayer.Theboundarylayer isthinunderneaththeforwardpartofthevessel,andincreasesin thicknessasitmovestowardsaft.Ifthesidesofthehullaresteep, someoftheairbubblesintheboundarylayermayescapetothe seasurfacealongthevesselsides.Itisourexperiencethatawide andatbottom,witharisinganglelessthanaround13degrees, ispronetogivingairproblemsforthetransducer.Inanycasea transducerlocationintheforwardpartofthehullispreferredin ordertominimisetheinuenceoftheboundarylayer.

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Wheretomountthetransducer

Mountthetransducerfarawayfromthepropellers

Thepropulsionpropelleristhedominantnoisesourceonmost shingvessels,researchvessels,merchantvesselsandpleasure crafts.Thenoiseistransmittedthroughtheseawater.For thisreason,thetransducershouldbeplacedfarawayfromthe propeller,whichmeansontheforepartofthehull.Positions outsidethedirectlineofsightfromthepropellerarefavourable. Onsmallvesselswithshortdistancesitisadvisedtomountthe transduceronthatsideofthekeelwherethepropellerblades moveupwards,becausethepropellercavitationisstrongeston theotherside.Thecavitationstartsmosteasilywhenthewater owsinthesamedirectionasthepropellerblade,andthatisto somedegreethecaseatthatsideofthekeelwherethepropeller bladesmovedownwards.

Mountthetransducerfarawayfromthebow thrusters

Bowthrusterpropellersareextremelynoisy.Wheninoperation, thenoiseandcavitationbubblescreatedbythethrustermake theechosounderuseless,almostnomatterwherethetransducer isinstalled.Andwhennotinoperation,thetunnelcreates turbulence,andifthevesselispitching,thetunnelmaybelled withairoraeratedwaterintheupperpositionandreleasethisin thelowerposition.Ingeneral,alltransducersmustbetherefore placedwellawayfromthebowthruster.However,thisisnot aninvariablerule.Certainthrusterdesignscombinedwithits physicallocationonthehullmaystilloffersuitabletransducer locationsnearthethruster.Ifyouareindoubt,consultanaval architect.

Mountthetransducerwithaslightlyinclined transducerface

Ideally,thetransducerfaceshouldbemountedinparallelwiththe seasurfacewhenthevesselisinnormaltrim,asthiswillprovide themostaccurateechoinformation.However,itisalsovery importantthatthew

a t e r  o w overthetransducerfaceislaminar. Inordertoensurelaminarow,thetransducerfacemaybetilted slightlyupwardsinrelationtothewaterow.Thisallowsthe owingwatertomeetthefacedirectly,andassureslaminarow. Theinclinationanglemusthoweverbedeterminedcarefully.The anglemustbesmallontransducerswithnarrowbeamangles.As aruleofthumb,mounttransducerswithbeamanglessmaller thansevendegreeswithminimuminclinationangle.Thesmaller beamangleyourtransducerhas,thesmallertheinclinationangle canbe.Ensurethatyoudonotmountthetransducerwitha negativeinclinationangle.Thismaycauseturbulenceunderthe transducerface,andreducedechosounderperformance.

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Simrad38/200CombiW

Summaryandgeneralrecommendations

Someoftheaboveguidelinesareconicting,andeachcasehas tobetreatedindividuallyinordertondthebestcompromise. Generallythepropellernoiseisthedominantfactor,anda recommendedtransducerlocationisintheforepartofthehull, withmaximumdistancefromthebowequaltoonethirdofthe totallengthofthehullatthewaterline.

Figure2Generalrecommendationfortransducerlocation

ATransducer

BInclinationangle

CHulllengthatwaterline

DMaximum1/3ofthehulllengthatwaterline(C)

Ifthevesselhullhasabulbousbow,thismaywellbeagood transducerlocation,butalsoheremustbetakenintoconsideration theowpatternoftheaeratedwater.Oftentheforemostpart ofthebulbispreferable.

Figure3Recommendedlocationofthetransduceronabulbous hull

AThruster

BTransducerlocation

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HOWTOINSTALLTHETRANSDUCER

Therearemanydifferentwaystomountthetransducer.These aretherecommendedmethodstomountacirculartransducer.

Transducerinstallationinblister

Withatransducerwithcircularhousing,onerecommended installationmethodisbyusingablister.Thetransducerblister mustbedesignedandmanufacturedbytheinstallationshipyard totthevessel’ssizeandhullshape.

Usemountingandclampingrings wheneverprovided

Circulartransducersmaybeprovidedwithmountingand clampingrings,orwithdrawingstoallowforlocalproduction ofthese.Themountingringisweldedtotheholepreparedfor thetransducer,whiletheclampingringtsaroundtheedgeof thetransducerbody.Boltsthroughtheclampingringintothe mountingringwillsecurethetransducerbetweenthem.Note thatseveraltransducersusedirectionguidestoallowcorrect mounting.

Howtoinstallthetransducer

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthe transducerortheareaimmediatelyaroundit.Makesurethatthe surfaceofthetransducerface,theinstallationhardwareusedto mountit,thehullplatingandtheputtyaroundthetransduceris asevenandsmoothaspossible.Obstructionsonthesesurfaces willcreateproblemswithturbulentow.

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Simrad38/200CombiW

(CD017010B)

Figure4Smallcirculartransducer

Example:Smallcirculartransducer

Theillustrationbelowshowsatypicaltransducerblisterdesigned forasmalltransducer.Thesameblisterdesignprinciplesasfora largetransducerapply.

AStreamlined

blister

BMountingring

CClampingring

DGuide

EAiroutlet

FForward

GTransducer

cable

Notethatthetransducercablemustbeprovidedwithacableloop insidetheblister.Observetheverticalforwardedgeoftheblister. Thiswillguidethewatertoeachsideoftheblister.

Commonguidelines

Thebestperformanceisobtainedwithablisterheightof40cm ormore.Astreamlinedshapeandroundededgesreducetheow noise.Averticalleadingedgeorfrontwillguidetheaerated watertothesidesoftheblister.Theorientationoftheblister shouldfollowthewaterow.

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Howtoinstallthetransducer

(CD17010C)

Theinterioroftheblistermustbelledwithseawater.Use drainageholesinthebottomandanairoutletonthetop.The waterpressurebehindthetransducerwillthencompensatefor theoutsidepressureduringvesselmovementsinroughsea.

Werecommendthatlargediametertransducersarettedwitha horizontalU-shapedsupportbar.Thisbarcanthenbesecured tothemountingringusingthreadedrods.

Thetransducercablepenetratesthehullinastufngtube.Leave anadequateloopofthecablebehindthetransducerforeasy mountingorremovalofthetransducer.

Toe-in

Theprimaryconsiderationmustbetoallowlaminarwaterow. Inmostcasesthisisachievedbydesigningtheblisterinparallel withthekeel.However,iftheblisterislocatedclosetothebow , thefrontoftheblistermayhaveafewdegreestoe-intowards thebow.

Figure5Toe-inprinciple

AKeel

BBlister

CT oe-inangle

Theanglemustbechosentoallowformostefcientwaterow. Itwillvarywiththelocationofthetransducer;thedepthbelow thehull,thedistancefromthebow,andthedistancetothekeel. Typicalanglesarefrom0to3°ondeplacementhulls.Onplaning hulls,theangleisnormallycloseto0°.

Physicallocation

Theblisterisplacedononeofthesidesofthehull,andthe distancefromthekeelisatradeoffbetweenaclosedistance givingaturbulentowofwaterinanarrowpassage,andalarge distancebringingthetransducerhigherupandalsomoreaffected byvesselroll.Normallyadistanceofapproximately1misa goodcompromise.

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