Simrad SU90 - Test Procedure

Finaltestsandmeasurements
cSetRangeto150meters
dSetFrequencyto26kHz
5OpentheSetupmenu.
aSetStabilizertoOff
Testprocedure
Observethefollowingproceduretomakethesourcelevelmeasurements.
1ConnectthehydrophoneandTXEnablepulsetotheoscilloscopeasshowninthe
testsetup.
→Testsetuponpage200
2Ensurethatthedistancebetweenthetransducerandthehydrophoneisbetween5
and10metersdependingonthesizeofyourvessel.
3Useaweighttokeepthehydrophoneinastableverticalposition.
4Lowerthehydrophoneandadjustthetiltonthesonartogetmaximumvoltageon
theoscilloscopeatatiltangleofapproximately0degrees.
5MeasurethetimedelayfromthenegativegoingTXEnablepulsetothetransmitter
pulseontheoscilloscope.
EntertheresultintotheSLMeasurementsresultstable,rowA.
6Calculatethedistancefromthehydrophonetosonartransducer,andthetotalsignal
losscausedbyofthisrange.
EntertheresultsintotheSLMeasurementsresultstable,rowB.
•Range(m)=Measuredtimedelay(inmsec)multipliedwith1,5
•Loss(dB)=20logR(range)
7Readtheoscilloscopemeasurements,andusethemanualtrainingcontrolsonthe
OperatingPaneltoobtainmaximumpossiblehydrophonevoltage.
8Readandcalculatethehydrophonevoltage,andentertheresultsintotheSL
Measurementsresultstable,rowC.
9EnterthegeneralinformationintotheSLMeasurementsresultstable,rowD.
•bearingangle
•tiltangle
•depthbelowkeel
•watertemperature
10EntertheUHydrvaluefromtheSLMeasurementsresultstableintotheSource
Level(SL)table,rowA.
11FillintheMtotalfromtheTesthydrophonedatatableintotheSourceLevel(SL)
table,rowB.
→Preparationsandtesthydrophonedataonpage199
12Enterthe20logRvaluefromtheSLMeasurementsresultstableintotheSource
Level(SL)table,rowC.
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