Simrad EK15 - Calibration Procedure

EK15calibration
Note
Alltransducersmustbehandledasdelicateitems.Anywrongfulhandlingmaydamage
thetransducerbeyondrepair .
Donotactivatethetransducerwhenitisoutofthewater .
Donotliftthetransducerbythecable.
Donotsteponthetransducercable.
Donothandlethetransducerroughly,avoidimpacts.
Donotexposethetransducertodirectsunlightorexcessiveheat.
Donotusehighpressurewater ,sandblastingormetaltoolstocleanthetransducerface.
Donotusestrongsolventstocleanthetransducerface.
Calibrationprocedure
Purpose
Thisprocedureexplainshowto
doasinglebeamcalibrationofthe
SimradEK15.
Prerequisites
Inordertodothiscalibration,
observethefollowingprerequisites:
•Thecalibrationmustbedone
inopenwater.Thisisbest
accomplishedfromananchored
boatinanareawithhomogenouswater;nothermalorsalinitylayers,andnocurrent.
•Youneedacalibrationsphere.Thesphereavailablefor200kHzismadeofcopper,
andithasadiameterof13.7mm.Itsnominaltargetstrengthvariesaround-45
dBre.1m²dependingontemperature,soundspeedandpulseduration.Seethe
documentationprovidedwithyoursphere,andselectthetargetstrengthclosestto
yoursettingsforactualenvironmentalconditions.
Procedure
1Lowerthecalibrationspheretoawaterdepthofminimum5meters.
Forbestresults,8to15metersdepthisrecommended.
2SetthepingintervalontheEK15to1s.
→Changingthe‘ping’parametersonpage62
3Verifyordenetheenvironmentalparameters.
Ifyouhaveatemperaturegradient,usethemeanwatercolumntemperature.
→Verifyingorchangingtheenvironmentalparametersonpage51
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