Important:
•The Pingdepthlimitshouldonlybeenabledwhenproblemsareexperiencedre-acquiring
depthreadingsafterthesonarhaslostdepthreadings.
•Once Pingdepthlimitisenabled,whensailinginwatersdeeperthanthespecifieddepthlimit
theFishfinderapp/transducerwillnotbeabletoestablishadepthreading/bottomlock.
ThePingdepthlimitcontrolenablesyoutospecifyadepthlimitthatyoursonarwillsearchdownto .
Itisrecommendedthatlimitissettoadepthofapproximately25%to50%deeperthanthemaximum
waterdepthyouwanttouseyourFishfinderin.E.g.:In200ftmaxdepthwaterthepingdepth
limitshouldbesetbetween250ftand300ft.
RealVision™3DAHRScalibration
RealVision™3Dtransducersincludeabuilt-inAHRS(AttitudeandHeadingReferenceSensor),which
measuresthemotionofyourvesseltoassistintherenderingofsonarimages.Afterinstallationall
RealVision™3Dtransducersrequirecalibration.
Anuncalibratedtransducercanproduceanoffsettothefrontedgeoftherenderofthebottomin
thesonarimage,asillustratedbelow.
Uncalibrated
Calibrated
Calibrationisanautomaticprocessandstartsafteryourvesselhasturnedappro ximately100°ata
speedofbetween3–15knots.Calibrationrequiresnouserinput,howeveratleasta270°turnis
requiredbeforethecalibrationprocesscandeterminethelocaldeviationandapplyarelevantoffset.
Thetimeittakestocompletethecalibrationprocesswillvaryaccordingtothecharacteristicsof
thevessel,theinstallationenvironmentofthetransducer,andthelevelsofmagneticinterference
atthetimeofconductingtheprocess.Sourcesofsignificantmagneticinterferencemayincrease
thetimerequiredtocompletethecalibrationprocess.Certainareaswithsubstantialmagnetic
deviationmayrequireextracirclesor“figureof8”manoeuvrestobeperformed.Examplesofsuch
sourcesofmagneticinterferenceinclude:
•Vesselengines
•Vesselalternators
•Marinepontoons
•Metal-hulledvessels
•Underwatercables
46
To Next Page
Loading...
