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X. DISPLAYING RELATIVE hPa/inHg OR ABSOLUTE hPa/inHg
Note: Air pressure can be displayed in four different measures:
Relative hPa/inHg and Absolute hPa/inHg. Absolute settings give a true
and real-time air pressure reading (at user’s location) that cannot be
manually calibrated. Relative air pressure is measured in relation to sea
level and is the standard meteorological form of measure. Relative air
pressure settings must be manually programmed to suit the users needs.
Relative air pressure can be found from local weather services. Absolute
air pressure decreases by about 0.01 inHg for every 10 feet in altitude.
In higher altitudes (above 6,500 feet), this effect is less noticeable. The
WS-7095U will measure absolute pressure reliably up to 7,500 feet.
There is no limit for relative air pressure since the user sets it.
1. Press the SET button twelve times to reach Relative or Absolute
Display setting mode.
2. The default “rel 29.91 inHg” will flash in LCD 4. Press the CH/+
button to toggle through “abs --.-- inHg”, “rel 1012.55 hPa”,
“abs --.-- hPa”.
3. Press the SET button to confirm, and to advance to the next setting
mode. The next setting mode depends on which was chosen,
Absolute or Relative. If Absolute is displayed, the next setting
mode will be to set the Bar Graph Display. If Relative is
displayed, the next setting mode will be to Manually set the
Relative Air Pressure.