Instruction Manual

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age60
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GNAV540UserManual
7430‐0808‐01Rev.B
RotationalAlignment
1. Ensuretheunitisconfiguredtousethe
externalmagnetometer.RefertoAdvanced
on
page56.
2. Ensurethelevelingalignmentofthe
magnetometerhasbeenconfigured(
Leveling
ent
Alignm 
3. Click
,page59).
Configurationandthenselect
MagnetometerAlignmentfromthedrop
menu.
60degreeturncanb dwithin
AutoTe
4. Ifthe3 ecomplete
120seconds,check
rminate.
5. Under
RotationalAlignment,selecttheStart
buttontobeginthealignment.Followthe
erto
instructionsdisplayedinthescreen.Ref
Figure21.
6. RotatetheGNAV540for380degreesof
rotationuntilthemessageisdisplayedthat
alignmentiscomplete.
Figure24ExternalMagnetometerAlignmentDialog

7. Aftercompletingtherotation,datawillbe
displayedwiththecalibrationparameters.
TheXandYoffsetvaluesindicatehowfarthe
magneticfieldhasbeenoffsetduetohardiron
affectsfromcomponentssurroundingtheunit.
ayed,which
540u it.
Thesoftironratiowillalsobedispl
istheeffectofsoftironontheGNAV n
8. Thesavetheoffsetvalues,clicktheApply
button.
Thenewconfigurationsettingswillbesaved,but
theywillnotbeimplementeduntileitherasoft
reset(viasoftware—see
InteractiveCommandson
page68)orahardreset(recyclepowerofthe
NAV540unit)takesplace.
G
Figure25MagnetometerAlignmentValues
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P
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