To Calibrate The Compass; To Disable Gps - DeLorme Earthmate PN-40 User Manual

Note: When the electronic
compass is enabled, the
Earthmate PN-40 uses it when
you are stationary or almost
motionless. It provides the
greatest accuracy when you
are not moving. When your
speed is .5 mph or higher, the
compass reading is based on
the GPS location.
Note:
• Calibrate the electronic
compass the first time you
use the Earthmate 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 type of battery you are
using — batteries have
unique magnetic fields that
affect the accuracy of the
electronic compass.
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finished entering the pressure, press ENTER, highlight Calibrate, and then press ENTER.
• GPS Elevation—The GPS elevation displays. Press ENTER.
5. When you see the message that your device is calibrated, press ENTER.
Note: If you use the Known Elevation or Known Pressure method to calibrate the altimeter, and
the Enable Barometric Altimeter check box is selected in Device Setup/Compass & Altimeter, a
message asks you if you want to disable it. Highlight Yes to disable or No to leave it enabled, and
then press ENTER.

To Calibrate the Compass

There are three steps for calibrating the electronic compass. If compass accuracy 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.
1. From the Satellite Page or the Compass Page press MENU.
2. Use the arrow keypad to highlight Calibrate and press ENTER.
3. Highlight Calibrate Compass and press ENTER.
4. Follow the on-screen steps to calibrate the compass.

To Disable GPS

There are many features on the Earthmate PN-40 that do not require a GPS fix. You can turn off the
GPS connection using the Disable GPS option in the Satellites menu.
1. From the Satellites Page, press MENU.
2. Use the arrow keypad to highlight Disable GPS and press ENTER.
GPS OFF displays in the top left corner of the screen and all satellites are removed from the
constellation display.