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Note:
Once the weather trend display has registered a change of the air pressure for the
first time, it will remain permanently visible on the LCD monitor.
Air pressure history (electronic barometer with air pressure trend)
The relative air pressure values and an air pressure history are displayed on the bot-
tom of the LCD monitor.
Depending on the type of programming, the air pressure history is displayed in the
shape of a graphic consisting of vertical bars.
The bar graphic of the electronic barometer shows the air pressure history of the last
12 hours in five 3-hour steps:
Air pressure change
in inHg
The horizontal axis represents the air pressure measuring values of the last 12 hours
(-12, -9, -6, -3 and 0 hours). The bar for each of the 5 steps shows the trend over the
measured time period. The scale on the right side compares the result. The 0 in the
middle of the scale denotes the current air pressure.
The vertical axis represents the air pressure changes in hPa (+4, +2, 0, -2, -4. 0 indi-
cates the current air pressure). Each deviation of +/- 2 hPa or 0.05 inHg) shows in
hectopascal (hPa) how high or low the past value was compared to the current air
pressure.
If the bars rise, this indicates a weather change for the better due to the increasing air
pressure. Dropping bars indicate a declining air pressure and therefore a weather
change for the worse as of the current time 0.
At each full hour, the current air pressure is used as basis for the display of a new
graphic bar. The existing graphic is then moved to the left by one bar.
Note:
For an exact barometer air pressure tendency display, the weather station should be
operated at a constant height above sea level. This means that the station should not
be moved from the ground floor to the top floors of a house. If this becomes neces-
sary, the display has to be ignored for the next 12 to 24 hours.
Wind direction and wind speed measuring
In normal display mode, the second section of the LCD monitor shows the following
wind data:
All manuals and user guides at all-guides.com
Air pressure
change in
hPa
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