La Crosse Technology WS-2317 Operation Manual page 19

Notes to inHg sensitivity setting for weather forecasting:
The inHg pressure sensitivity can be set to suit the user's
requirement for weather forecasting from 6 inHg, 9 inHg to 12
inHg (see Basic Programming below). For areas that
experience frequent changes in air pressure (which does not
necessarily reflect a change in the weather) requires a higher
inHg setting compared to an area where the air pressure is
stagnant. For example if 6 inHg is selected, then there must
be a fall or rise in air pressure of at least 6 inHg before the
weather station will register this as a change in weather.
Air Pressure (LCD Section 1)
The air pressure reading is displayed here. Press the
PRESSURE key to toggle between relative and absolute air
pressure displays.
Notes to Absolute and Relative Air Pressure:
Absolute air pressure provides the display of the true
measured air pressure of the current time and location. This is
not programmable and the absolute air pressure range of the
weather station is from 8.85 inHg to 32.45 inHg (standard air
pressure at an altitude of 30,000ft is around 8.85 inHg).
Relative air pressure is the one value that is calculated back
to sea level from the local absolute air pressure and can thus
be taken as a reference for weather condition and weather
development for the entire country. It can be programmed to
represent your local surroundings. Since the relative air
pressure is also the one value given by various newspapers,
TV and radio broadcasting stations in their daily weather
forecasts for their respective locations, users can set the
relative air pressure of the weather station to this value to
represent readings your their area (see Basic Programming
Modes below).
Weather Data (LCD Section 2)
Indoor temperature and humidity are displayed simultaneously
in this section. Use the DISPLAY key to toggle through the
displays for other weather information:
- Outdoor temperature/humidity
- Outdoor wind chill
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