Calibrating the SensorsBefore you navigate, you need to calibrate the elec-tronic compass and the altimeter.Calibrating the Electronic CompassYou need to calibrate the electronic compass outdoorsthe first time you use the 76CS Plus and each timeyou install new batteries.To calibrate the electronic compass:1. Go outside and away from objects thatgenerate a magnetic field, such as buildings.2. Press the MENU key three times to open theSetup Menu.3. Highlight Calibration and press ENTER.4. Highlight Compass and press ENTER.5. Press ENTER to begin calibrating thecompass. Follow the on-screen directions.Hold the unit level and adjust your turning speed asinstructed by the on-screen messages. If “CalibrationFailed” displays, repeat the process.When using the compass, hold the unit level and awayfrom objects that generate magnetic fields.Calibrating the AltimeterYou can calibrate the altimeter to increase its accu-racy. You must know the elevation or pressure at yourcurrent location; use a reliable source.To manually calibrate the altimeter:1. Press the MENU key three times to open theSetup Menu.2. Highlight Calibration and press ENTER.3. Highlight Altimeter and press ENTER.4. To enter the elevation,highlight Yes and pressENTER on the firstscreen. If you do not knowthe elevation, select No touse the pressure option.If you do not know thepressure, select No to usethe default GPS elevation.5. Use the Rocker key toenter the new elevation orpressure. Press ENTERwhen finished.6. Highlight OK and press ENTER to finish.Entering the currentelevation.76CS Plus Owner’s Manual 7GETTING STARTED > C ALIBRATING THE SENSORS190-00507-00_0A.indd 7 2/14/2005 3:33:14 PM
