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
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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.
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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°.
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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

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•Createasoundvelocityprole
•Ifnecessary,createafoldersystemforthedataanddenethelocationofwheretosave
thedata.
Context
Westronglyrecommendthatcalibrationsurveysaredoneatregularintervals.Asa
minimum,calibrationmustbedonepriortoeachsurvey.
Procedure
1Makethenecessarypreparations.
2Positionthevesselatthestartofthesailingpath.
3StarttheCalibrationWizard.
4Startsailingaccordingtothesailingpath.
5FollowtheinstructionsfromtheCalibrationWizard.
YoumaycalibratetheEK80systemsimultaneouslyasyoucollectdata,oralternatively
calibrateafterthecollectionofdataisnished.
6Saveandprocessthecalibrationdata.
CalibrationvaluesaredisplayedintheNumericaleldandintheInstallationdialog
boxontheTransducerInstallationpage.
Supportinformation
IfyouneedtechnicalsupportforyourEK80,youmustcontactyourlocaldealer,oroneof
oursupportofces.Alistofallourofcesanddealersisavailableonourwebsite.Youcan
alsocontactourmainsupportofceinNorway.
Globalsupport24hours
Oursupportteamcanbereachedatallhoursusingoneofthefollowingoptions:
•KM-SupportApp:www.kongsberg.com/no/maritime/support/km-support-app
•Website:www.kongsberg.com/ocean-science
•Emailaddress:[email protected]g.com
•Telephone:[phone]
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CalibratingtheADCPsystem
Topics
Preparingcirclecalibration,page11
CirclecalibrationforADCPinrealtime,page14
CirclecalibrationforADCPinreplay,page18
ReprocessingcalibrationresultsforADCP,page20
Preparingcirclecalibration
Circlecalibrationcalibratesyawangleandpitchangleaswellaspositiononthex-axis
(alongship)andy-axis(athwartship).Theprocedureinvolvespreparationsintermsof
ndingtherightlocation,optimalseaconditions,usinganoptimalsailingpatternandsetting
thecorrectADCPcalibrationsettingsfortheacousticsignals.
Context
InacirclecalibrationforADCPthevesselismovinginacircularsailingpattern,using
ADCPcalibrationsettingsfortheacousticsignalsandcollectingADCPdata.Allother
acoustictransmissionsarestopped.TheADCPrawdataisrecorded.Attheendofthe
proceduretheoperatorupdatestheinstallationanglesandpositionsusingtheresultofthe
calibrationprocedures.Itisalsopossibletostorethecalibrationresultsinan.xmllefor
lateruse.
BeforestartingtheADCPcalibrationprocessthereareafewkeypreparationstoconsider.
•Evaluateseaconditions.
•SelectalocationforcollectingADCPdataforcalibration.
•Conguresensorpriority,ifnecessary
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•InsertinstallationparametersforGPSantennaandtransducer,ifnecessary
•Congureasensorformeasuringwatertemperature.Thebuilt-insensorinthetransducer
maybeused.
•Setupleandfoldersettingsfortherawdatacreated.
AnyadjustmentstotheEK80systemlesaredoneautomatically.
Note
Calibrationmustbetakenseriously.Toachievethebestresults,thecalibrationmustbe
plannedanddonecarefully.
Procedure
1Findasuitablelocation.
Asuitablelocationmustbeselectedbeforethecalibrationcanstart.Thefollowing
requirementsmustbemet:
•Depth:100metres(Depthvariationsbetween50and200metresareaccepted.).
MostimportantlyforADCPcalibrationisastablebottomtrack.Thisismosteasily
obtainedinanareawithasmoothseaoor.
•Seaoor:Smooth
•Area:400x400metres(minimum)
•Seaconditions:Calm
2Deneyoursailingpath.
aVesselpath:Foracirclecalibrationthevesselmovesintwosetsofcircularpaths.
Therstsetofcirclesaremadeturningthevesselportorstarboard,collectingan
adequateamountofADCPdata.Thisisfollowedbyturningthevesselinthe
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oppositedirection(starboardorport)creatingthesamecircularpathandcollecting
ADCPdata.Thediameterofthecirclesmustbewithin200to400meters.
bVesselspeed:6knots(3m/s)orhigher.
cTurnrate:0,5-1.0deg/s.Thisisachievedbyfollowingthevesselspeedand
diameterspecications.
3ThefollowingADCPpulsecongurationissetautomaticallyusingtheCalibration
Wizard.
Thisinformationisincludedforreferenceonly,youdonotneedtosetthesevalues
manually.
aPulseType:FM(fortherelevantADCPchannel)
bPower:maximum
cStartFrequency:138kHz
dEndFrequency:162kHz
UseminimumvalueforStartFrequencyandmaximumvalueforEndFrequency
toachievemaximumfrequencyspan.
eDepthCellSize:8metres
fPinginterval:Max(1000ms)
gPingMode:Interval
4Range:50-200m
Makesurethedepthvalueenteredisthedeepestofthecalibrationarea.Thisisset
throughtheCalibrationWizard.
5Measurethesalinityandthetemperatureinthewatercolumn.
6Calculatetheaveragesalinityandtemperaturevalues,andtypetheseintothe
Environmentdialogbox.
TheEC150hasatemperaturesensorwhichmaybeusedasatemperaturesource.
TheEnvironmentdialogboxisopenedfromtheSetupmenu.Thesoundvelocityis
automaticallycalculatedbytheEK80system.
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CirclecalibrationforADCPinrealtime
TheCalibrationWizardallowsyoutocollectandprocesstheADCPcalibrationdataand
adjustthecalibrationvaluesfortheechosoundersystem.Whentheprocessingisnished,
youcansavetheresultsandupdatethecalibrationdata.
Prerequisites
BeforetheADCPcalibrationprocesscanstartthefollowingadditionalprerequisitesmustbe
met:
•Allpreparationsarecompleted.
•TheEK80systemisfullyoperational.
•Navigationalinputmustbeinplace,meaningaGPSandanMRUmustbeconnected.
•NTPTimesynchronizationmustbeused.
•Validtemperaturemeasurementsarereceivedfromthetransducer.
•Createasoundspeedprole
•StoretherawdataasComplexData.Thismakestroubleshootingthecalibrationeasierif
necessary.
Context
Datacollectionandprocessingisdonewhileusingaspecicsailingpatternthatincludes
twosetsofcircles.Rawdataisautomaticallycollectedwhilesailingthevesselintwosets
ofcircles,turningthevesselinoppositedirectionforeachofthecircleset.Thisensures
nodirectionalbiasisintroduced.Thesetupofcalibrationparameterssuchaspower,ping
intervalsandsoonissetbytheCalibrationWizard.Thedataobtainedwhileperformingthe
calibrationisrecordedandprocessedaspartoftheCalibrationWizardprogress.
Note
AllotheracousticsignalscontrolledbyEK80areautomaticallyturnedoffwhilethe
CalibrationWizardisactive.
Thefollowingoperatingrequirementsmustbemetforeachsetofcircles:
•Vesselspeed:6knots
•Turnrate:0,5-1.0deg/s.Thisisachievedbyfollowingthevesselspeedanddiameter
specications.
•Diameterofthecircles:200-400m
•Numberofpings:Aminimumof600pingsforeachsetofcircles.
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TheADCPrawdatawhichisstoredwhilerunningtheCalibrationWizardwillautomatically
benamedaccordingly:
•CI-initializationleThisisarequiredleforallreplayprocesses.
Example:CIADCPCalibration-DYYYYMMDD-T1XXX
•C1-circleset1-Thesearetherawlesfortherstsetofcircles.
Example:C1ADCPCalibration-DYYYYMMDD-T1XXX
•C2-circleset2-Thesearetherawlesfortherstsetofcircles
Example:C2ADCPCalibration-DYYYYMMDD-T1XXX
Thenumberofaccumulatedprocessedpingsisdisplayedaswellastheaccumulatednumber
ofacceptedandrejectedpings.Progressfromtherstsetofcalibrationcirclestothesecond
setandfromthesecondsettocalibrationprocesscompletedisdecidedbythenumberof
acceptedpingsineachsetofcircles.
•Red:Lessthan450pingshavebeenaccepted.
•Yellow:450-600pingshavebeenaccepted
•Green:600ormorepingsareaccepted
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Procedure
1Bringthevesseltothecorrectspeedatthestartingpointoftherstsetofcircleswith
theADCPrunning.
Makesureyouknowtherequirementsforthevesselspeed,turnrate,sailingpattern
seaconditionsandwaterdepth.
2Startsailingincirclesturningonewayaccordingtothesailingpattern.
3SelectCalibrationintheSetupmenu.ThisopenstherstpageoftheCalibrationWizard.
4Ontherstpageinthewizard:SelectNewcalibrationfromrawdata(Realtimeor
Replay).
5SelectNexttoproceedtothenextpageinthewizard.
6Onthesecondpageinthewizard:Selectwhichchanneltocalibrate.
IfyouhaveseveralADCPchannelsforyourEK80system,theyarecalibrated
individually,onebyone.
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7SelectNexttoproceedtothenextpageinthewizard.
8OnthethirdpageoftheCalibrationWizardyoustartrecordingrawdataforthe
calibrationsurvey.
aEnterthemaximumexpecteddepthforthisarea.
Makesuretoaddabitofmargin,asthecalibrationrequirestheseaoortobe
withintheenteredrange.
bSelectStart.
StarttriggersasetupoftheEK80parametersforcalibration,suchasmaximum
power,ping,ittriggersacheckthatmotiondataisreceivedwithinanacceptable
rate,seabottomisdetectedandthatinitializationdataisrecordedcorrectly.
Note
TheEK80systemnowstartspinging.
WhenalltheseactionsareinplacethestatusindicatorswillturngreenandtheStart
Recordingoptionismadeavailableforyoutocontinuethecalibrationprocess.
cSelectStartRecordingwhenthevesselhasstartedtherstsetofcircles.
Rawdataisnowbeingrecorded.Youmayfollowtheprogressthroughthesailing
patterndisplayedintheupperleftsection,andaccumulatednumberofpings
displayedthenumberofpingsacceptedandrejected.Thecalibrationparameters
arecalculatedfordatainbatchesof50pingsanddisplayedinthediagramsto
theleft.
Thestatusindicatorswillturntoyellowwhenthereare450acceptedpings,
andgreenwhenthereare600acceptedpings.At600pingstheStopRecording
optionwillbeenabled.
Youwillnowseethefollowinginformation
•Thesailingpatternwhichhasbeenused,completewithsetsofcircles.
•Thedepthmeasuredinthepingsthroughoutthecalibrationsurvey.
•Thevaluesforroll,pith,yawandxandyoffsetandscaleasthesearechanging
throughthecalibrationsurvey(andhopefullylandingonasetoffairlystable
values).
•Thecalibrationresultsdisplaystheactualabsolutevaluesinnumbersforeach
oftheroll,pitch,yawandx-andy-offsetaswellasscale.
dSelectStopRecordingwhenyouhaveenoughrawdatafortherstsetof
calibrationcircles(600acceptedpings)andthestatusindicatorforrstsetof
circlesiscompletehasturnedgreen.
eTurnthevesselandplaceinstartpositionfortherstsetofcircularsailingpattern.
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fSelectStartRecordingforthesecondsetofcalibrationcircleswheninposition,
andproceed.
Rawdataisnowbeingrecordedandthesameprocessasfortherstsetof
calibrationcirclesisrepeatedforthesecondsetofcalibrationcircles.
gSelectStopRecordingwhenyouhaveenoughrawdataforthesecondsetof
calibrationcircles(600acceptedpings)andthestatusindicatorforrstsetof
circlesiscompletehasturnedgreen.
Youwillnowseethefollowinginformation
•Thesailingpatternwhichhasbeenused,completewithsetsofcircles.
•Thedepthmeasuredinthepingsthroughoutthecalibrationsurvey.
•Thevaluesforroll,pith,yawandxandyoffsetandscaleasthesearechanging
throughthecalibrationsurvey(andhopefullylandingonasetoffairlystable
values).
•Thecalibrationresultsdisplaystheactualabsolutevaluesinnumbersforeach
oftheroll,pitch,yawandx-andy-offsetaswellasscale.
9SelectNextinthelowerrightcornerwhenthestatusindicatorindicatesyellowor
greenforCalibrationprocesscompleted
10Inthedialogboxthatopens,selectY estoacknowledge.
Savethexml-leinanappropriatelocation.
Thexml-leincludesallcalibrationresults.Youdonotneedtousethisatthemoment,
butcanreloadthelelateranddothecalibrationthen.
11SelectFinishinthelowerrightcornertonishthecalibrationprocess.
12InthedialogboxthatopensselectY esifyouwantthenewcalibrationvaluesforyaw,
pitch,rollx-andy-offsetandscaletobeimplementedintheEK80software.The
CalibrationWizardterminatesautomatically.
Relatedtopics
CalibrationWizarddialogbox#3realtime,page27
CirclecalibrationforADCPinreplay
Calibratingusingreplayisagreatadvantagewhenyouwanttocheckacalibrationorredoa
calibrationprocess.
Prerequisites
Thefollowingprerequisitesmustbemetforasuccessfulcalibration:
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•Rawdataforacirclecalibrationhasbeenrecordedinadvance
•AcomputerwithEK80installed
Context
Datacollectionhasbeendonefollowingacircularsailingpattern.Therawdatahasbeen
storedinalesystemandusedforanewcalibration.
TherawdataisselectedintheCalibrationdialogbox.
Procedure
1LoadtheinitializationleintheTopbarandstartReplay.
TheinitializationlesareprexedCI.
2OpentherstpageoftheCalibrationWizardfromtheOperationmenu.
3SelectNewcalibrationfromrawdata(RealtimeorReplay).
4OnthesecondpageoftheCalibrationWizardselectwhichchanneltocalibrate.
5OnthethirdpageoftheCalibrationWizardselecttherawdatalesusedforcalibration
byselectingSelectFile(s).
Selectalllesforreplaycirclecalibration.Thelesetmustconsistofleswiththe
followingprexes:
•CI:Initializationle
CalibratingtheADCPsystem