Kongsberg Simrad EK80 User manual

kongsberg.com/ek80
ADCP Calibration EK80
INSTRUCTION
MANUAL

110-0037585/A
May2023©KongsbergMaritimeAS
EK80
Widebandscienticechosounder
UsermanualforADCPcalibration
Release23.6.0
Thispublicationprovidesyouwiththebasicinformationrequiredto
calibratetheEK80systemttedwithrelevanthardwareforADCP
measurements.FormoreinformationaboutthepracticaluseoftheEK80
system,aswellasdetailedinformationaboutthefunctionsanddialog
boxesprovided,refertotheReferenceManualand/orthecontextsensitive
On-linehelp.
Note
Youmustneversetthesystemtopingunlessthetransducerissubmerged
inwater .Mosttransducersaredamagedbeyondrepairiftheytransmitin
openair .Preventinadvertentuseofthesystemwheneveratransduceris
notsubmerged.
Additionalend-userdocumentsrelatedtotheEK80systemcanbefound
onourwebsite.Thisincludespublicationsthataretranslatedintoother
languages.
•https://www.kongsberg.com/ek80

KongsbergMaritimeAS
www.kongsberg.com
Documentinformation
•Product:EK80
•Document:UsermanualforADCPcalibration
•Documentpartnumber:110-0037585
•DocumentISBNnumber:N/A
•Revision:A
•Dateofissue:28May2023
Copyright
TheinformationcontainedinthisdocumentremainsthesolepropertyofKongsbergMaritimeAS.Nopartof
thisdocumentmaybecopiedorreproducedinanyformorbyanymeans,andtheinformationcontainedwithin
itisnottobecommunicatedtoathirdparty,withoutthepriorwrittenconsentofKongsbergMaritimeAS.
Warning
Theequipmenttowhichthismanualappliesmustonlybeusedforthepurposeforwhichitwasdesigned.
Improperuseormaintenancemaycausedamagetotheequipmentand/orinjurytopersonnel.Y oumustbe
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
AboutacousticDopplercurrentproler(ADCP)calibration.................................................7
Vesselcoordinatesystemandrotationangles.........................................................................8
ADCPcalibrationsummary....................................................................................................9
Supportinformation..............................................................................................................10
CALIBRATINGTHEADCPSYSTEM..............................................11
Preparingcirclecalibration....................................................................................................11
CirclecalibrationforADCPinrealtime..............................................................................14
CirclecalibrationforADCPinreplay..................................................................................18
ReprocessingcalibrationresultsforADCP..........................................................................20
FUNCTIONSANDDIALOGBOXES...............................................22
Calibrationfunction..............................................................................................................22
CalibrationWizarddialogbox#1.........................................................................................23
CalibrationWizarddialogbox#2.........................................................................................24
CalibrationWizarddialogbox#2reprocess.........................................................................25
OptionsintheCalibrationWizardpage3.............................................................................26
CalibrationWizarddialogbox#3realtime................................................................27
CalibrationWizarddialogbox#3replay....................................................................35
UsermanualforADCPcalibration

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EK80

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Aboutthismanual
ThispublicationprovidesyouwiththebasicinformationrequiredtocalibratetheEK80
systemttedwithrelevanthardwareforADCPmeasurements.
Relevantproducts
ThispublicationprovidesyouwiththebasicinformationrequiredtocalibratetheEK80
systemforcurrentindicatormeasurements.Thepublicationisvalidforthefollowing
products:
•KongsbergEK80
Targetaudience
CalibratingtheEK80systemforADCPmeasurementsensuresthattheaccuracyisobtained.
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.
EK80UsermanualforADCPcalibration

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Introduction
Topics
AboutacousticDopplercurrentproler(ADCP)calibration,page7
Vesselcoordinatesystemandrotationangles,page8
ADCPcalibrationsummary,page9
Supportinformation,page10
AboutacousticDopplercurrentproler(ADCP)
calibration
ThepurposeofanADCPcalibrationistodeterminetheexactinstallationparametersfor
theADCPtransducerwithashighprecisionaspossible,aswellasthesocalledScaling
FactorfortheADCPdata.
ExactinstallationparametersfortheADCPtransducerisnecessarytoachievehighaccuracy
foreachping,removingthenecessitytocalculateanaverageacrossmanypingstoget
acceptabledata.
InstallationparametersarethepositionsandanglesfortheADCPtransducer,comparedto
theNavigationalReferencePoint(NRP).
Therearethreeinstallationangles.
•roll-rotationaroundthex-axisofthevessel
•pitch-rotationaroundthey-axisofthevessel
•yaw-rotationaroundthez-axisofthevessel.
InstallationpositionreferstothedistancefromtheNRPtothepositionoftheADCP
transducer.
Introduction

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•x-positionisgiveninthealongshipdirection
•y-positionisgivenintheathwarthshipdirection
•z-positionisgivenintheverticaldirection
ThedeviationangleandpositionareestimatedduringthecalibrationbycomparingtheGPS
andMRUoutputwiththeuncompensatedbottomtrackfromtheADCP .Whenapplyingthe
calibrationresultsthesedeviationsareaccountedfor,andahigherlevelofaccuracyand
lessbiaswillbeachieved.
Theprocessrequiresaspecicsetofsettingsfortheacoustics.Thissetupisaquired
automaticallyusingtheCalibrationWizard.Thevesselismovingaccordingtoaspecic
sailingpatternatadenedspeedandinasuitablelocation.Thedataobtainedduringthis
processisusedforcalibratingtheADCPfunctionality.
Vesselcoordinatesystemandrotationangles
Thepositionofallsensorsonavesselisdenedinthevesselcoordinatesystem.The
rotationangleinallthreeaxisdirectionsequallydescribestheorientationofeachsensor.
Theseparametervaluesareimportanttocompensateforwhenusingrollpitchandheading
incalculations.
Thevesselcoordinatesystemfollowstheright-handrule.Ifyoutakeyourrighthandand
alignthethumbwiththepositivex-axis,thencurlthengerssothattheindexngerpoints
inthedirectionofthepositivey-axis,yourmiddlengerpointsinthepositivez-axis.Using
thedenedorigoofthevesselyoucannowdenethecentreoftheinstalledunit.
Theorientationofaninstalledunitisspeciedbythreerotationangles,calledEulersangles.
Eachrotationisspeciedbyanangleofrotation.Therotationangleisdenedtobepositive
forarotationthatisclockwisewhenviewedbyanobserverlookingalongtherotationaxis
fromtheoriginofthecoordinatesystem.
Forexample,thecartsonaFerriswheelmovealongacirclearoundtheahorizontalaxis
throughthecentreofthatcircle.Ifacartmovesaroundthewheelonce,theangleof
rotationis360°.Ifthecartwasstuckhalfway,atthetopofthewheel,atthatpointits
angleofrotationwasonly180°.
EK80UsermanualforADCPcalibration

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•
aX-axis
Thisisthemainaxis
inthevessel’sforward
(alongship)direction.
Positivevaluesare
forwardrelativetothe
origin.Positiverotation
angleisstarboardside
down.
bY-axis
Thisisthetransverse(athwartships)direction.Positivevaluesaretoward
starboardrelativetotheorigin.Positiverotationangleisbowup.
cZ-axis
Thisistheverticaldirectioninparallelwiththemast.Positivevaluesaredown
relativetotheorigin.Positiverotationangleisbowtowardsstarboard.
dOrigo
Theorigoisthecommonreferencepointwhereallthreeaxisinthevessel
coordinatesystemmeet.Allthephysicallocationsofthesensorsarereferenced
tothereferencepoint.
ADCPcalibrationsummary
TheEK80systemmaybecalibratedinrealtimeorusingreplayles.Thecalibration
processinvolvesseveralstepsandpreparations.
Prerequisites
Thefollowingconditionsmustbeconsidered:
•AcalibrationmethodmeetingtherequirementsforaccuracyandqualityforADCPdata
mustbeselected.ForADCPcalibrationacirclecalibrationmethodisused.
•Asuitablelocationmustbeselectedbeforethecalibrationcanstart.
•HardwaresuchastransceiversandtransducersmustbeinstalledintheEK80software.
•Navigationalinputmustbeinplace,meaningaGPSandanMRUmustbeconnected.
•NTPTimesynchronizationmustbeused.
•Measurethewatertemperature
Introduction