Calibrating The Barometer - Polar Electro AXN500 User Manual

3. Continue by pressing the Start button and follow the step below:
4. The display reads:
Activate: ALTI or
• To return to the Time main mode, press and hold the Stop button.
Note:
• Due to the fact that both the altimeter and barometer measurements are based on barometric pressure, you can use only one of these features at a time.
Activating the barometer turns off the altimeter and vice versa.
• Every time you activate the barometer and Action recording is on, a Marker is recorded automatically.
Tip: How to Predict Weather Changes when Using the Altimeter
If you notice that the altitude reading is significantly off (you know your altitude is about 2000 m / 6500 ft, but the altimeter reads
3000 m / 9500 ft), this could result from a change in weather conditions. You should prepare yourself for a change in the weather.

3.3.2 CALIBRATING THE BAROMETER

Calibrate the barometer by setting the sea level pressure. Information sources such as weather stations, airports, or Internet
weather pages can provide you with your sea level pressure reference value. Calibrate your barometer often to ensure it
remains accurate.
Tip: When calibrating the barometer, the altimeter is calibrated simultaneously.
If you do not know the current sea level pressure, but you know your exact altitude, you can calibrate the current altitude of your position to help
determine the sea level pressure of your location and vice versa. For further information on altimeter calibration, see page 41.
44 MEASURING AND RECORDING WITH YOUR OUTDOOR COMPUTER
Press the Up
BARO to select
or Down button
BARO (barometer).
Press the Start button to active
the selected function.