Kongsberg Simrad EK80 User manual

kongsberg.com/ek80
TS Calibration EK80
INSTRUCTION
MANUAL

110-0001152/A
August2023©KongsbergMaritimeAS
PUBLIC
KongsbergEK80
Widebandscienticechosounder
UsermanualforTScalibration
Release23.6.0

KongsbergMaritimeAS
www.kongsberg.com
Documentinformation
•Product:EK80
•Document:UsermanualforTScalibration
•Documentpartnumber:110-0001152
•DocumentISBNnumber:N/A
•Revision:A
•Dateofissue:28August2023
Copyright
TheinformationcontainedinthisdocumentremainsthesolepropertyofKongsbergMaritimeAS.Nopartof
thisdocumentmaybecopiedorreproducedinanyformorbyanymeans,andtheinformationcontainedwithin
itisnottobecommunicatedtoathirdparty,withoutthepriorwrittenconsentofKongsbergMaritimeAS.
Warning
Theequipmenttowhichthismanualappliesmustonlybeusedforthepurposeforwhichitwasdesigned.
Improperuseormaintenancemaycausedamagetotheequipmentand/orinjurytopersonnel.Youmustbe
familiarwiththecontentsoftheappropriatemanualsbeforeattemptingtooperateorworkontheequipment.
KongsbergMaritimedisclaimsanyresponsibilityfordamageorinjurycausedbyimproperinstallation,
useormaintenanceoftheequipment.
Disclaimer
KongsbergMaritimeASendeavourstoensurethatallinformationinthisdocumentiscorrectandfairlystated,
butdoesnotacceptliabilityforanyerrorsoromissions.
Supportinformation
Ifyourequiremaintenanceorrepair,contactyourlocaldealer.Youcanalsocontactususingthefollowing
address:[email protected].Ifyouneedinformationaboutourotherproducts,visit
https://www.kongsberg.com.Onthiswebsiteyouwillalsondalistofourdealersanddistributors.

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Tableofcontents
ABOUTTHISMANUAL..................................................................5
INTRODUCTION...........................................................................7
Calibrationfortargetstrength(TS)measurements.................................................................7
Supportinformation................................................................................................................9
TSCALIBRATION.......................................................................10
PreparingTScalibration.......................................................................................................10
SelectingNormalOperationparametersforTScalibration.................................................13
Recordingrawdata...............................................................................................................14
StartingTScalibrationandcollectingechodataforsplit-beamtransducers........................15
StartingTScalibrationandcollectingechodataforsingle-beamtransducers.....................18
Choosingwhichrawdatale(s)toreplay............................................................................21
CleaningthecollectedTSdata(Split-beamtransducers).....................................................22
CleaningthecollectedTSdata(Single-beamtransducers)..................................................23
Modifying,addingandremovingafrequencyband.............................................................24
FUNCTIONSANDDIALOGBOXES...............................................25
CalibrationWizarddialogbox#1.........................................................................................25
CalibrationWizarddialogbox#2(SelectChannel).............................................................26
CalibrationWizarddialogbox#3(SelectSphere)...............................................................28
CalibrationWizarddialogbox#4(ImportData):Split-beamtransducer............................32
CalibrationWizarddialogbox#4(ImportData):Single-beamtransducer.........................40
CalibrationWizarddialogbox#5(ProcessData):Split-beamtransducer...........................48
CalibrationWizarddialogbox#5(ProcessData):Single-beamtransducer........................58
Secondaryfunctionsanddialogboxes..................................................................................68
ReplayFiledialogbox................................................................................................68
Edit/AddSpheredialogbox........................................................................................70
CalibrationDescriptiondialogbox.............................................................................72
SingleTargetDetectiondialogbox.............................................................................73
UsermanualforTScalibration

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KongsbergEK80

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Aboutthismanual
ThispublicationprovidesyouwiththebasicinformationrequiredtocalibratetheEK80
systemttedwithrelevanthardwarefortargetstrength(TS)measurements.
Relevantproducts
ThispublicationprovidesyouwiththebasicinformationrequiredtocalibratetheEK80
systemforcurrentindicatormeasurements.Thepublicationisvalidforthefollowing
products:
•KongsbergEK80
Targetaudience
CalibratingtheEK80systemforTSmeasurementsensuresthattheaccuracyisobtained.
Calibrationmustbetakenseriously.Toachievethebestresults,thecalibrationmustbe
plannedanddonecarefully.Duetothenatureofthedescriptionsandthelevelofdetail
providedbythispublication,itiswellsuitedforthosewhoare-orwishtobe-expertusers.
Agoodunderstandingofsystemfunctionsandcontrolsisessentialtofullytakeadvantage
ofthefunctionalityprovided.
Softwareversion
Thispublicationwascreatedforthefollowingsoftwareversion:23.6.0.
Onlineinformation
Allend-usermanualsprovidedforoperationandinstallationofyourEK80systemcan
bedownloadedfromourwebsite.Thisincludespublicationsthataretranslatedinto
otherlanguages.SelectedpublicationsarealsoprovidedinIETM(InteractiveElectronic
TechnicalManual)formats.Ourwebsitealsoprovidesinformationaboutotherproducts
fromKongsbergMaritime.
•https://www.kongsberg.com/ek80
Aboutthismanual

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Registeredtrademarks
Observetheregisteredtrademarksthatapply.
Simrad®,SIMRAD®andtheSimrad®logoareeitherregisteredtrademarks,ortrademarks
ofKongsbergMaritimeASinNorwayandothercountries.
Windows®isaregisteredtrademarkofMicrosoftCorporationintheUnitedStatesand
othercountries.
Wewantyourfeedback
Wealwayswanttoimproveourproducts.Wealsowantourend-userdocumentationto
becomprehensiveandrelevant.Y oucanhelp.Pleaseprovidecomments,suggestionsor
constructivecriticismtoanyofoursupportofces.
KongsbergEK80UsermanualforTScalibration

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Introduction
Topics
Calibrationfortargetstrength(TS)measurements,page7
Supportinformation,page9
Calibrationfortargetstrength(TS)
measurements
TargetStrength(TS)calibrationofanechosounderservestwopurposes.Itensuresaccurate
measurementsbycharacterizingandcompensatingforvariationsinthetransducer,the
transceiverandtheenvironment.Itisalsothebestwaytoensurecorrectoperationof
theentiresystem.Werecommendthatyouperformacalibrationbothbeforeandafter
animportantsurvey.
Whenstarting,theEK80systemdoesavalidationcheckofthecalibration.Itchecksifthe
previouscalibrationwasdoneusingthesametransceiverasincurrentuse.Ifthisisnotthe
caseamessagewillrequireanewcalibration.
Note
Calibrationmustbetakenseriously.Toachievethebestresults,thecalibrationmustbe
plannedanddonecarefully.
Duringstartup,theEK80systemwillcheckifacalibratedtransducerpresentisconnected
tothesametransceiverasinthepreviouscalibration.Ifnot,theoperatorisnotied,anda
requesttoconrmthecalibrationisissued.
InordertoperformaTScalibrationoftheEK80system,areferencetarget(calibration
sphere)withknownTSisloweredintothesoundbeam.ThemeasuredTSiscomparedwith
theknowntheoreticalTSofthesphere,andtheEK80systemisadjustedaccordingly.
Introduction

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Inthiscontext,thetransducerbeamisconicallyshapedwithacross-sectionareaincreasing
withthedepth.Asplit-beamtransducerhasthreeorfoursectors.Thecircularcross-section
issplitintoseveralslices.
TosuccessfullycalibratetheEK80systemyouneedtoplaceanumberoftargetdetectionsin
eachslice.Theechoesmustbedistributedwithintheentirebeamcross-section.Inorderto
dothis,thetargetspheremustbephysicallymovedinsidethebeamduringthecalibration
process.Thenumberofspheredetectionsshouldbeapproximatelythesameforeachslice,
andintotalnotmorethan100forthewholebeamcross-section.
AnyadjustmentstotheEK80systemlesaredoneautomatically.Nogainadjustmentsare
required.
AnewcalibrationmayalsoberequirediftheEK80softwareisupdated.Refertothe
softwarereleasenote.
TheinformationprovidedbythecalibrationisenteredintotheEK80softwareasoperational
parameters.Thisisdoneautomatically.TheEK80systemusesthenarrow-bandcalibration
forCWoperations,andthewide-bandcalibrationforLFMoperations.Innarrow-band
calibration,thefactorygainandtheSacorrectionarestoredfortheselectedpulselength.
Thebeamopeningandoffsetvaluesarestored/updatedforthelastroundofcalibration.
•ForaCWoperationwithanot-calibratedpulselength,thefactorygainandtheSa
correctionwillbeused,whereasthebeamopeningandoffsetvalueswillbeextracted
fromthelastroundofcalibration.
•ForaLFMoperation,thewide-bandcalibrationisusedforallpulselengths.
ATScalibrationcanalsobea"sanity"checkofthesystem,asitallowsyoutoverifythatall
partsofthesystemworkcorrectly.
Tip
WerecommendthatyoucalibratetheEK80incalmsea.Inareaswithcalmseaandlow
seacurrents,positioningthesphereandkeepingitwithinthedetectionareaoftheEK80
transduceriseasier.
Sacorrection
TheSacorrectionisonlycalculatedforCWtransmissions.
•WhencalibratingaWideBandTransceiver(WBT),theeffectivepulsedurationis
calculatedandusedtoestablishtheSacorrection.ThiswillnormallyresultinaSa
correctionaround0dB.
•WhencalibratingaGeneralPurposeTransceiver(GPT),theSacorrectionisbasedonthe
nominalpulseduration.ThiswillnormallyresultinaslightlynegativeSacorrection.
KongsbergEK80UsermanualforTScalibration