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change in the weather was when it was sunny (the sun icon only). Therefore, the next change in the weather
will be cloud with rain icons since the indicator is pointing downwards.
Note:
Once the weather tendency indicator has registered a change in air pressure, it will remain
permanently visualized on the LCD.
AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC PRESSURE
TREND)
The right side of the second section of the LCD shows the air pressure history bar graph.
The bar graph indicates the air pressure history trend over the last 12 hours in 5 intervals: 0h, -3h, -6h, -9h
and -
12h. The “0h” represents the current full hour air pressure recording. The columns represent the “hPa”
(0, ±1, ±3, ±5) at specific time. The “0” in the middle of this scale is equal to the current pressure and each
change (±1, ±3, ±5) represents how high or low in “hPa“ the past pressure was compared to the current
pressure.
If the bars are rising it means that the weather is getting better due to the increase of air pressure. If the bars
go down, it means the air pressure has dropped and the weather is expected to get worse from the present
time “0h“.
Note:
For accurate barometric pressure trends, the weather station should operate at the same altitude for
recordings (i.e. it should not be moved from the ground to the second floor of the house). When the unit is
moved to a new location, discard readings for the next 12 hours.
ABSOLUTE/RELATIVE AIR PRESSURE
Press the SET key to toggle between relative (“
rel
”) and absolute (“
abs
”) air pressure displays.
Note:
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 300 hPa to
1099 hPa (standard air pressure at an altitude of 9,100 meters is around 300 hPa).
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
Air pressure trend over
the last 12 hours
Absolute air pressure display
