Simrad SX90 - INSTALLATION REV C - General Installation Requirements; Approval by Classification Society; Supply Power; Compass Deviation

SimradSX90
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Generalinstallationrequirements
Thefollowinginstallationrequirementsareapplicabletothis
SimradSX90Fishndingsonardelivery.
Approvalbyclassicationsociety
TheSX90Fishndingsonartransducerinstallationmustbe
approvedbyDetNorskeVeritas(DNV)oranotherclassication
society.Theshipownerandshipyardperformingtheinstallation
areresponsibleforobtaininginstallationapproval.
Supplypower
Thesupplyvoltagetotheequipmentistobekeptwithin±10%of
theinstallation’snominalvoltage.Maximumtransientvoltage
variationsonthemainswitchboard’sbus-barsarenottoexceed
-15%to+20%ofthenominalvoltage(exceptunderfault
conditions).
SimradrecommendsthattheSX90Fishndingsonarispowered
usinganUninterruptablePowerSupply(UPS)withsinewave
output.TheUPSmusthavethecapacitytoindependently
maintainpowertothesystemforaminimumof10minutes.
Thisensuresthatthesystemcanbeswitchedoffinacontrolled
mannerintheeventofapowerfailure.
Compassdeviation
Oncetheinstallationiscomplete,thevesselmustbeswungwith
thesysteminboththeoperativeandinoperativemodes.The
shipownerandcaptainareresponsibleforupdatingthedeviation
tableaccordinglywithregardtothevessel’snationalregistryand
correspondingmaritimeauthority.
Noisesources
Thevessel’shull,rudder(s)andpropeller(s)shouldbethoroughly
inspectedindrydockpriortoinstallation.Roughnessbelow
thewater-linedeformitiesintheshellplatingandprotruding
obstaclescancreateunderwaternoise.Thesesourcesof
turbulencemustbesmoothedorremovedasbestaspossible.Itis
especiallyimportantthatthepropeller(s)isnotpittedordamaged.
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