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J. DISPLAYING RELATIVE hPa/inHg OR
ABSOLUTE hPa/inHg
Note: Air pressure on this unit can be displayed in four different
measures: Relative hPa, Absolute hPa, Relative inHg, and
Absolute inHg. The Absolute setting gives a true and real-time air
pressure reading (at the users location) that cannot be manually
calibrated. However the Relative air pressure setting must be
manually programmed to suit the users needs. Relative air
pressure is measure in relation to sea level and is the standard form
of measure. You can retrieve the Relative air pressure from your
local weather service. Absolute air pressure decreases by about .01
inHg for every 10 feet in altitude. In higher altitudes (above 6,500
feet) this effect is less noticeable. The WS-7059SU will measure
absolute pressure reliably up to 7,500 feet. There is no limit for
relative air pressure since the user sets it. Most weather reports
and radio reports use relative inHg.
1. “rel inHg” will flash in the pressure LCD.
2. Press and release the “CH/+” button to toggle
through the Absolute and Relative options until you
reach the desired setting.
3. Press and release the “MODE/SET” button to
confirm and advance to the manual setting of the
Relative air pressure.