Simrad 38-200 COMBI W - INSTALLATION REV D Installation Manual

Installation manual

Simrad 38/200 Combi W
Dual frequency echo sounder transducer

TECHNOLOGY FOR SUSTAINABLE FISHERIES

www.simrad.com

Simrad38/200CombiW

Installationmanual

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

Observethemaximumpowerratingsforthis

transducer!

164986/D

13October2009

Documenthistory

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

Rev.A08.11.04

Firstversion.

Rev.B

20.05.05

Addedinformationaboutcableglands.

Rev.C06.06.05

Correctederrorontheoutlinedimensiondrawingonpage29.
Thecorrectouterdiameteris180mm.

Rev.D

06.10.09

Additionalinformationadded.

Copyright

©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.

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w w w . s im r a d . c o m

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

4

164986/D

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

h

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

164986/D

5

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.Youcanread
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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164986/D

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

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.

Figure1Boundarywaterlayer

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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164986/D

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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164986/D

Howtoinstallthetransducer

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.

Smoothsurfaceisimportant

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

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Simrad38/200CombiW

Example:Smallcirculartransducer

Theillustrationbelowshowsatypicaltransducerblisterdesigned
forasmalltransducer.Thesameblisterdesignprinciplesasfora
largetransducerapply.

Figure4Smallcirculartransducer

AStreamlined

blister

BMountingring

CClampingring

DGuide

EAiroutlet

FForward

GTransducer

cable

E

E

A

C

G

D

F

B

(CD017010B)

Notethatthetransducercablemustbeprovidedwithacableloop
insidetheblister.Observetheverticalforwardedgeoftheblister.
Thiswillguidethewatertoeachsideoftheblister.

Commonguidelines

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

12

164986/D

Howtoinstallthetransducer

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

(CD17010C)

A

B

C

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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