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Additional Information
The Calibrate menu option is available from the Satellite
Page and the Compass Page, and the Device Setup >
Compass & Altimeter option.
In addition, from the Device Setup > Compass & Altimeter
menu, you can enable or disable the electronic compass,
barometric altimeter, and the auto-calibrate barometer
options or restore the default settings.
Compass and Altimeter Settings
Use the Compass & Altimeter options on the Device
Setup Page to enable/disable the electronic compass,
the barometric altimeter and the auto-calibrate altimeter
feature.
From any page, go to
MENU > Device Setup > Compass
& Altimeter
.
Select the check box to enable the option.
Enable Electronic Compass
–If this is not selected,
the device uses the GPS compass.
Enable Barometric Altimeter
–If this is not selected,
the device uses the GPS elevation.
Auto Calibrate Altimeter
–Allows auto-calibration
of the altimeter. See
Altimeter Calibration
for
more information.
To restore the default settings
To restore the default settings for the options above, from
any page go to
MENU > Device Setup > Compass &
Altimeter > Restore Defaults
.
Compass Calibration
Calibrate the electronic compass the first time you use
the PN-40.
Make sure you are outside and away from magnetic
fields, such as vehicles and power lines, when you
calibrate the compass.
Calibrate when you change the batteries—batteries,
even of the same type, have unique magnetic fields
that affect the accuracy of the electronic compass.
The device periodically checks the compass accuracy;
if it is poor, “Poor Accuracy” appears in the bottom
right corner of the Compass Page and a red
exclamation point displays in the Heading info field.