Raymarine REALVISION 3D RV-3 Series - AHRS Calibration Process

5.
1RealVision™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:
•Marinepontoons
•Metal-hulledvessels
•Underwatercables
Note:
TheCalibrationprocesswillrequirerepeatingaftera
SonarresetorMFD Factoryreset.
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