Simrad ST90 - Adjusting the Built-In Motion Sensor Offset

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6Obtainthealignmentanglefromthepersonnelthatinstalledthehullunit.
aRotationAroundX:Specifyanangle(indegrees)tocompensateforany
deviationfromtheXaxis(fore-and-aftdirection)inthecoordinatesystem.For
systemsusingahullunitthisvalueshouldbesetto0degrees.
bRotationAroundY:Specifyanangle(indegrees)tocompensateforany
deviationfromthey-axis(athwartshipdirection)inthecoordinatesystem.For
systemsusingahullunitthisvalueshouldbesetto0degrees.
cRotationAroundZ:Specifyanangle(indegrees)tocompensateforany
deviationfromtheZaxis(verticaldirection)inthecoordinatesystem.Thisis
thealignmentangle.
•Ifthe0°transducermarkpointstothestarboard(right)sideofthevessel’s
centreline,insertthealignmentasanumberbetween0and+180degrees.
•Ifthe0°transducermarkpointstotheport(left)sideofthevessel’scentre
line(asshownintheillustration),insertthealignmentasanumberbetween
0and–180degrees.
Examples:
•Ifthealignmentangleis295degrees,insert-65degrees.
•Ifthealignmentangleis15degrees,insert15degrees.
Dothisasaccuratelyaspossible.
7Atthebottomofthepage,selectApplytosaveyoursettings.
8ContinueyourworkintheInstallationdialogbox,orselectOKtocloseit.
Relatedtopics
Settingtoworksummary,page242
Insertingtheinstallationparameters,page296
Adjustingthebuilt-inmotionsensoroffset
Theinformationfromamotionreferenceunit(MRU)(normallyheave,rollandpitch
information)isimportedintotheST90toincreasetheaccuracyoftheechodata.The
ST90isprovidedwithabuilt-inmotionsensor.ItisplacedinsidetheMotorControlUnit.
Prerequisites
TheST90isinstalledasspeciedinthismanual.
•TheST90isturnedon,anditisworkingnormally.
•TheST90isinNormalmode,butTXPowerissettoOfftopreventtransmission.
•Thetransducerisretractedtoitsupperposition.
•Thevesselisberthedoratsea.
Neithertoolsnorinstrumentsarerequired.
Settingtowork