Technical information

SimradEK60
10EnterthefollowingdataintheRecorddialog:
aTransducer’sserialnumber
bCorrecttheoreticaltargetstrength(TS)forthereferencetarget
cAlloweddeviationfromtheTSforthereferencetarget
•Thisisawindowgivingthelimitsforthesystem’sacceptanceofsingle
targetechoescomingfromsh.Theclosertothecorrectreferencetarget
TSthelimitshavebeenset,themoreoftheunwantedshechoeswillbe
rejected.Ontheotherhand,iftheechofromthereferencetargetistoo
closetooneofthelimits,thedeviationhastobeincreasedbeforestarting
collectingdata.ThisisbecauseitwillalwaysbeacertainvariationinTS
valueswhenthereferencetargetisbeingmovedtocoverthecompletebeam.
dUpperandlowerdepthlimitsforthetargetwindow
•Anarrowwindowwillhavesameeffectasabove,reducingthepossibilityof
detectingunwantedechoesfromsh.
eAnycommentsyoumaywishtoaddtothecalibrationle
11ClickOKwhenyouhavenishedenteringdata.
Thecalibrationprogramwillnowbeginrecordingdata.
Views
YouwillseetwoviewsintheCalibrationwindow;aPlotviewandanInformationview.
Averticalbarisshownontheleftsideofeachview.Abluecolourindicatesthatthe
viewisactive,whilegraycolourindicatesapassiveview.Ifyouwishtoprintaview,
orperformotheroperationsconnectedtoit,youmustmakesurethatthedesiredview
isactive.
InthePlotviewyouwillseerecordeddataplottedasblueandredcircles.Bluecircles
indicateTSvaluesbelowthecurrentbeammodel,whileredcirclesindicatevalues
abovethecurrentbeammodel.IntheupperpartoftheInformationviewyouwillsee
variousinformationassociatedwithrecordingofthecalibrationdata.Linescontaining
thisinformationallbeginwitha#.Belowthisinformation,recordedvaluesforeachnew
TSdetectionareupdatedcontinuouslyduringdatarecording.
1Movethereferencetargetslowlyaroundtorecordasufcientnumberofdatapoints
(>100)evenlydistributedinsidethebeam.Makesurethatareasonablenumberof
hitsaremadeclosetothecentreofthebeam.Thisisimportantinordertoensurea
correctestimatefortheSacorrectionparameter.
2Whilemovingthetargetyoushouldkeepthereferencetargetwithinthedepth
limitsyouenteredintheRecorddialog.
3Whilemovingthetargetandrecordingofdatapointsstops,themeasuredTSvalue
maybeoutsidethelimitsenteredintheRecorddialog.
4StopandrestartrecordingasrequiredbyusingtheStop/Startcommandfoundinthe
Mainmenu.Itisrecommendedtostopcollectingdataifunwantedshechoesare
enteringintothedepthwindow,andrestartagainwhendisappeared.
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