Absolute pressure

Absolute atmospheric pressure is the actual pressure at the time and place the measurement is taken, and cannot be modified.

To obtain the most accurate barometer readings, you have the option to adjust the hemisphere and climate zone based on your geographical location. In the "T-TOUCH" / "SETTINGS"/ " Calibration"/ "Altimeter" functions, select your climate zone either manually or automatically, using the simplified Koeppen climate classification (see illustration below). If the watch is not set ("Not Set"), the standard atmosphere model is used: set temperature at sea level = 15°C, mean pressure at sea level: 1013.25 hPa.