Eurochron EFWS 900 S Bedienungsanleitung Seite 75

—
The calculation of the weather forecast only based on the barometric pressure
only results in a maximum accuracy of about 70%. Therefore, the weather may
be completely different on the next day. As the measured air pressure is only
valid for a region with a diameter of approx. 50 km, the weather may change
quickly. This is especially true in hilly or mountainous locations.
Therefore, don't depend on the weather forecast of the weather station, but
inform yourself locally when you would like to hike in the mountains, for example.
—
In case of sudden or larger air pressure fluctuations, the display symbols are
updated to indicate the weather change. If the display symbols do not change,
either the air pressure did not change or the change occurred so gradually that
it cannot be registered by the weather station.
—
If the weather forecast "Sunny" or "Rainy" appears, the display also does not
change when the weather turns better (display "Sun") or worse (display "Rain"),
as the display symbols already show the two extreme situations.
The display symbols indicate a weather change for the better or worse, which
does not have to mean sun or rain, however, as indicated by the symbols.
—
After first insertion of the batteries, disregard the weather forecasts for the
first 12 to 24 hours, because the weather station first has to collect barometric
pressure data in this period at a constant height above sea level to make a more
exact forecast.
—
If you take the weather station to a place that is significantly lower or higher
than the original site (e.g. from the ground floor to the top stories of a building),
the weather station may interpret this as a weather change.
75