Celestron 48003 TrekGuide - COMPASS CALIBRATION AND DECLINATION; Compass Sensor Calibration; Magnetic Declination Angle Setting

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coMpaSS SenSor calibraTion
ThecompassshouldbecalibratedbeforeuseORwhenthe
batteriesarereplaced.
• InCOMPASSmodeholdthe“C”buttonfor3secondsto
enterthecompasssensorcalibrationmode,andpressthe
“C”buttontostartthecalibration.
• Keeptheunitinalevelpositionorontopofanon-metallic
table/desk.ReferencethearrowshowingintheLCD,rotate
thecompassclockwiseforonefullrotationslowly:
• Whennished,theLCDwilldisplay“OK”ifthecalibrationis
successfulordisplay“Fail”ifitfailedas:
SeT The MaGneTic declinaTion anGle
Theanglebetweenmagneticnorthandthetruenorthdirection
iscalledmagneticdeclination.Theearth’smagneticpoles
uctuateovertime,anditalsovariesfromplacetoplace.Find
themagneticdeclinationonamaporwebsite,andthenset
thedeclinationonthisunittooffsetthedifferencebetween
magneticnorthandtruenorth.Pleasenotethatifyoufailtodo
this,thereadingsyougetfromthecompasscouldbeinerror.
• InCOMPASSmode,holdthe“C”buttonfor3secondsto
enterthecompasssensorcalibrationmode,press“MODE”
buttontoentersettingofthedeclinationangle.Theangle
willashontheLCD.Forexample,belowthe“0°”willash
ontheLCD).
• Press“▼”or“▲”tochangetheanglevalue,rangefrom
-90°to90°,andpress“MODE”buttontoconrmandexit
thesetting.
Note: The compass must be kept in a level position
when in use. Taking a measurement while the unit is not
horizontal (in relation to the horizon) can result in a large
measurement error.
Always take bearings in the open air, because it is easily
affected by disturbing sources of magnetism.
direcTion MeaninG
ENE
East-
Northeast
SSE
South-
Southeast
WSW
West-
Southwest
NNW
North-
Northwest
direcTion MeaninG
NE Northeast
SE Southeast
SW Southwest
NW Northwest
direcTion MeaninG
NNE
North-
Northeast
ESE
East-
Southeast
SSW
South-
Southwest
WNW
West-
Northwest
direcTion MeaninG
N North
E East
S South
W West
→ →
coMpaSS bearinG leGend