Flytec Alti Windwatch - Manual (Page 6)

4
Barometer / Time Barometer/Time
General remarks General remarks
It is possible to forecast the weather based on
a change in air pressure at the same location.
An improvement in the weather can be
expected when the air pressure is rising.
Conversely, a deterioration in the weather can
be expected if the air pressure is falling.
A barometer measures the current local air
pressure. As this decreases as altitude in-
creases, the air pressure at a certain altitude
above sea level must be set in relation to the
air pressure at sea level. To do this, it is
necessary to enter the local altitude above
sea-level (= the altitude of your current
location).
NB: You must re-enter the altitude of your
location whenever you change locations as
it would otherwise be impossible to make a
reliable weather forecast.
The bar chart in the barometer main menu
shows the development of air pressure over
the last 16 hours thereby permitting a weath-
er forecast to be made. The chart compares
the air-pressure values measured 16, 8, 4 and
2 hours previously with the current value.
One bar height corresponds to 2 hPa or the
corresponding value in inHg.
If the chart ascends from left to right, the air
pressure has risen and better weather can be
expected. If the chart descends from left to
right, the weather is deteriorating. If the chart
shows no movement, there will be no change
in the weather.
Better weather
Worse weather
No change in the weather