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pressure (the pressure your location would be at if located at sea-level) is
generally higher than your measured pressure.
Thus, your absolute pressure may read 28.62 inHg (969 mb) at an altitude
of 1000 feet (305 m), but the relative pressure is 30.00 inHg (1016 mb).
The standard sea-level pressure is 29.92 in Hg (1013.2hpa). This is the
average sea-level pressure around the world. Relative pressure
measurements greater than 29.92 inHg (1013.2hpa) are considered high
pressure and relative pressure measurements less than 29.92 inHg are
considered low pressure.
To determine the relative pressure for your location, locate an official
reporting station near from you (the internet is the best source for real-time
barometer conditions, such as the website of Weather.com or
Wunderground.com), and set your weather station to match the official
reporting station.
Wind Speed Calibration
In the calibration mode, press the
SET
button twice and the wind speed
value will flash (the default is 1.00).
Press the
C
key or
MAX/MIN/-
key to adjust the wind speed
calibration factor from 0.75 to 1.25, where:
Calibrated Wind Speed = Calibration factor x Measured Wind Speed
Press and hold the
C
or
MAX/MIN/-
key for three seconds to
increase or decrease rapidly.
Press the
ALARM
key to reset current value.
