La Crosse Technology WS-9020U 915MHZ instruction manual AIR Pressure Tendency Indicator

Note:

After initial set up of the intelligent weather station with the setting of the relative value, readings for weather forecasts should be disregarded for the next 12-24 hours. This will allow sufficient time for the intelligent weather station to collect air pressure data at a constant altitude and therefore result in a more accurate forecast.

If the intelligent weather station is moved to another location significantly higher or lower than its initial standing point (for example from the ground floor to the upper floors of a house), set again the relative air pressure value, and discard the weather forecast for the next 12-24 hours. By doing this, the intelligent weather station will not mistake the new location as being a possible change in air-pressure when really it is due to the slight change of altitude.

AIR PRESSURE TENDENCY INDICATOR

The air pressure tendency indicators are located on the left side of the air pressure display, below the weather icons, and they work independently from the weather forecast icons. The air pressure tendency indicator pointing upward or downward directions is displayed based on comparing the difference of the air pressure recorded during a full hour time frame.

Note:

•An upward air pressure tendency indicator means that there is an increase in air pressure within the past 4 hours.

•A downward air pressure tendency indicator means that there is an decrease in air pressure within the past 4 hours.

AIR PRESSURE

The fifth section of the LCD shows the relative air pressure and the air pressure history.

Air pressure changes in hPa

Air pressure over the last 12 hours

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