Instruction Manual

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greaterthanthevaluesspecifiedonthedatasheetorfluctuatingheadingperformancemayindicatemagneticfield
disturb
ancesneartheunit.
NOTE:AnacceptablecalibrationwillprovideXandYHardIronOffsetValuesof<0.1andaSoftIronRatio>0.95.If
thisproceduregeneratescalibrationparameterssignificantlyoutsideofthisrange,thesystemwillassertthe
softwareErrorÆdataErrorÆmagAlignOutOfBoundserrorflag.Referto
Chapter11.BuiltInTest(BIT))for
detailsabouterrorflaghandling.
Formoreinformationaboutmagneticfieldsandtheeffectsonreadingsandalignment,refertoChapter4.
MagnetometerCalibrationandAlignmentGuidelines
onpage39.
AlignmentInstructions
Follo structionsusingNAV‐VIEW2.2.wingarethemagnetometeralignmentin
•
AligningInternalMagnetometer,page58
•
AligningExternalMagnetometer,page59
AligningInternalMagnetometer
1. Ensuretheunitisconfiguredtousetheinternal
Advan page56.
magnetometer.Referto
cedon
2. Onthemenubar(see
Figure8),click
ConfigurationandthenselectMagnetometer
Alignment
fromthedropmenu.
60degreeturncanb within
onds,checkAutoTe
3. Ifthe3 ecompleted
120sec
rminate.
4. Under
RotationalAlignment,selecttheStart
buttontobeginthealignment.Followthe
instructionsdisplayedinthescreen.Referto
Figure21.
5. RotatetheGNAV540for380degreesofrotation
oruntilthemessageisdisplayedthatalignment
iscomplete.
Figure21InternalMagnetometerAlignmentDialog
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Page58
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GNAV540UserManual
7430‐0808‐01Rev.B
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