Tissot T-TOUCH LADY SOLAR User Manual - Page 11

T-TOUCH SOLAR E81 ALTIMETER > READING The altitude is displayed on the digital screen for 10 hours continuously. After 10 hours, altimeter mode is deactivated, and the date is displayed. The favourite altitude unit system for displaying the altitude (m or ft) depends on the 12/24-h unit configuration (see page 8) For example: Units in 24-h = altitude in metres. 1 sec. Activate glass Altitude display according to the favourite altitude unit system ALTIMETER > ALTITUDE PRESETTING Altitude display according to the second altitude unit system 2 sec. or or Altitude display Setting mode : up 1 m or 3 ft : down 1 m or 3 ft Validate setting ALTIMETER > GLOSSARY Description of function In altimeter mode, your T-TOUCH SOLAR E81 becomes a barometric altimeter, displaying the altitude relative to mean sea level. Explanations This is a barometric instrument, which calculates the altitude as a function of absolute pressure (atmospheric). As the altitude rises, pressure drops, and vice versa. So the altimeter measures the difference between absolute pressure (atmospheric) and relative pressure (relative to sea level) to display the altitude. Your T-TOUCH SOLAR E81 is temperature compensated, and you can adjust your geographic location (hemisphere and climate zone). The altitude displayed is therefore corrected automatically. NB! Due to the use of pressure to calculate altitude, the altimeter is sensitive to variations in atmospheric pressure in weather changes. It is not uncommon to observe altitude differences of 100 m in a night. So the value displayed may vary without the altitude having actually changed. 4473 m 4473 m 4473 m Note 1: "Presetting" an altimeter means setting the actual altitude of a known point (see presetting procedure on page 11). The actual altitude values are indicated on various media: signposts, contour lines and spot heights on maps. The altitude "presetting" is in line with relative atmospheric pressure. Note 2: In an airliner, since the cabin is pressurised, your altimeter will not indicate an accurate altitude. Note 3: To optimise the accuracy of your altimeter, you are advised to select the climate zone, see page 9. Characteristics of function Measurement range Altimeter resolution Unit conversion - 400 m to +9000 m 1 m 1 metre [m] = 3.281 feet [ft] - 1333 ft to +30,000 ft 3 ft 1 foot [ft] = 0.305 metres [m] Weather change = pressure variation = displayed altitude change www.tissot.ch 11/16 153_EN