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GPS/Sensor
∫ About the measured altitude and atmospheric pressure
•
Altitude value may show errors depending on the change in atmospheric pressure compared to
areas such as locations with altimeter reference signs. Perform frequently with [Adjust] in [Altimeter].
• Altitude announced onboard an airplane is measured using the atmospheric pressure surrounding
the airplane. It does not match the altitude actually measured inside the airplane.
• Even if the unit is fixed at a constant altitude, the measured altitude may fluctuate due to the effects
of change in atmospheric pressure.
In coastal areas, the altitude changes by 1 m (3.3 feet) per 0.12 hPa.
• Altitude and atmospheric pressure may not be measured
accurately in the following cases:
– When there is a significant change in weather conditions
(Pressure and air temperature)
– When there is a movement with a rapid change in altitude
– When pressure is applied to the front or rear of this unit
¢1
– When this unit is wet (after using underwater, etc.)
¢2
– When closing the side door
¢2
¢1 Hold this unit as shown in the figure when measuring.
¢2 It will adapt to the ambient atmospheric pressure within a few minutes, and display correct
measurement values.
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