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442703/B

345

TestingtheST90operationalfunctionality

Topics

Checkingthetransducerlowerandhoistfunctionality,page345

MeasuringtheBITEnoiseinPassivemodewiththetransducerconnectedtothe

TransceiverUnit,page350

VerifyingST90operationbymeansoftheBITEfunctionality,page352

VerifyingST90operationbymeansoftheElementBITEfunctionality,page356

Makinganoise/speedcurvetodeterminevesselnoise,page360

Checkingthetransducerlowerandhoistfunctionality

ThehullunitprovidedwiththeST90isdesignedtolowerthetransducerdownbelowthe

ship’shullwhentheST90shallbeused.ThisisakeyfunctionalityoftheST90.Itisvery

importantthatthehoist/lowerfunctionistestedbeforetheST90isputtooperationaluse.

Inordertotestthelowerandhoistfunctionalityofthehullunit,twotasksmustbedone

simultaneously.Twopersonsarerequired.

•OnepersonmuststayonthebridgeinordertooperatetheST90.

•OnepersonmuststayinthesonarroomtoverifythattheTransceiverUnitstarts,and

thatthehullunitworksproperly.

Certainstepsinthetwoproceduresarelocationspecic.

•Thestepsmarked[Sonarroom]aredoneinthesonarroom.

•Thestepsmarked[Bridge]aredoneonthebridge.

Note

Properoralcommunicationmustexistbetweenthebridgeandthesonarroom.Inthe

eventofproblemsormalfunctions:

1LocatetheMotorProtectingSwitch(S301).

2SettheswitchtopositionOFF .

Topics

Checkingthetransducerlowerandhoistfunctionality-Bridgesteps,page346

Checkingthetransducerlowerandhoistfunctionality-Sonarroomsteps,page348

Settingtowork

Simrad ST90 Installation Manual

Other manuals for Simrad ST90