Absolute And Relative Atmospheric Pressure - barigo E7S Operating Instructions Manual

BARIGO E7/E7S
A graph appears in the display which allows you to track changes to
atmospheric pressure (i.e. the absolute atmospheric pressure at the
point of measurement) over the past 20 hours. Information about the
current temperature, time and weather forecast also appears.
The exact absolute atmospheric pressure reading (in hPa or in Hg)
at your current location is displayed to the right of the graph.
5.1

Absolute and relative atmospheric pressure

Before we come to the settings for the barometer on your watch, we
would like to discuss absolute and relative atmospheric pressure, as
your BARIGO E7/E7S uses these two values to calculate the current
height at your measuring location.
Since atmospheric pressure decreases with increasing altitude, and
increases with decreasing altitude, and temperature differences are
unavoidable, fluctuations in the calculation of the current altitude will
naturally occur. According to the barometric elevation formula, in the
lowest altitudes up to 1,000 metres, the atmospheric pressure
changes by around 1 hPa for every 8 metre increase in altitude. The
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