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1
Rising
2
Steady
3
Falling
The temperature and humidity trend indicator shows the
trends of changes in the forthcoming few minutes. Arrows
indicate a rising, steady or falling trend.
21 Barometric/Atmospheric pressure
Barometric or atmospheric pressure (hereinafter referred to
as "air pressure") is the pressure at any place on earth due
to the weight of the layer of air above it. The air pressure is
in relation to the average pressure and gradually decreases
with increasing altitude. Meteorologists use barometers to
measure the air pressure. Because the weather depends on
changes in air pressure to a large extent, it is possible to
make a weather forecast from the measured air pressure
changes.
Air pressure values
The air pressure can be displayed in the units hPa/mba or
mmHg.
A distinction is made between the following air pressure val-
ues:
Abs:
Absolute air pressure at your current location
Rel:
Relative air pressure based on sea level (N.N.)
The default relative air pressure value is 1013 mbar/hPa
(29.91 inHg), which is relative to the average air pressure
value.
The built-in barometer registers environmental changes in
absolute air pressure. Based on the collected data, a fore-
cast can be made for the weather conditions in the next 12
