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CalibratingtheEK80Widebandscientiîš¿cechosounder
AcompletetestoftheEK80Widebandscientiîš¿cechosounderisdonebymeansofa
systemcalibration.
Prerequisites
InordertocalibratetheEK80,thefollowingequipmentisrequired:
•Referencetargets(metalspheres)tottheoperationalfrequencies
•Wincharrangementwithrelevantlinestolowerthesphereintothesoundbeam
Thevesselmustbeanchoredinasuitablepositionwithsufîš¿cientdepth,andwithcalm
andshelteredwater.
Context
InordertocalibratetheEK80,areferencetarget(calibrationsphere)withknowntarget
strength(TS)isloweredintothesoundbeam.Themeasuredtargetstrengthisthen
comparedwiththeknowntargetstrength.Duringthecalibration,thecalibrationsphereis
physicallymovedinsidethesoundbeam.
KongsbergMaritimecansupplyavarietyofcopperandtungstencalibrationspheres
dedicatedfordifferentoperationalfrequencies.Eachspherediameterisselectedfor
minimumtemperaturedependence.
Procedure
1Preparethevesselforcalibrationaccordingtotherelevantprocedures.
2CalibrateallchannelsontheEK80Widebandscientiîš¿cechosounderaccordingto
therelevantprocedures.
Settingtowork
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