Simrad ST90 - Page 304

302
442703/B
Caution
YoumustneversettheST90to"ping"unlessthetransducerissubmergedinwater.
Thetransducermaybedamagedifittransmitsinopenair.
ABow
BThisistheoffsetangle.
C0°transducermark
D0°motionsensorreference
Context
Asageneralrecommendation,the
hullunitshallbeorientedwiththe
hoist/lowermotorpointingaft
.Ifthis
orientationmakesitdifculttoaccess
theMotorControlUnit,thehullunit
mayberotatedduringitsinstallation
tothemostsuitabledirection.The
0°referenceforthebuilt-insensor
isalwaysrelatedtothegantry.Ifthe
hoist/lowermotordoesnotpointaft
(onorparalleltothevessel’scentre
line)thebuilt-inmotionsensoroffset
mustbedened.Independentofthe
hullunitorientation,theoffsetofthe
built-inmotionsensorisalwaysdenedas:
Theanglemeasuredfromthebowtothemotionsensor’ s0°reference.
Tip
Forimprovedoperationalaccuracy,anexternalmotionreferenceunit(MRU)may
beused.
OntheMRUpage,denetheoffsetasrotationaroundZ.
•Ifthe0°referencemarkforthebuilt-inmotionsensorpointstothestarboard(right)
sideofthevessel’scentreline(asshownintheillustration),inserttheoffsetasa
numberbetween0and+180degrees.
•Ifthe0°referencemarkpointstotheport(left)sideofthevessel’scentreline,insert
theoffsetasanumberbetween0and–180degrees.
SimradST90InstallationManual