Tissot 141_EN5/14 - Manual (Page 8)

www.tissot.ch 141_EN 8/14
T-TOUCH EXPERT
*
ALTIMETER
Activate glass Altitude display Altitude difference
display
: up 1 m or 3 ft
: down 1 m or 3 ft
Validate setting Setting mode Altitude display
SETTING > ALTITUDE PRESETTING
1 sec.
or or
The altitude is displayed on the digital screen for 4 hours continuously. After 4 hours, the altimeter mode is deactivated, and the
date is displayed.
Description of function
In weather mode, the hands are superimposed to
indicate the weather trend.
Explanations
Weather changes are related to variations in at-
mospheric pressure. When atmospheric pressure
increases the sky clears. The area is then referred
to as a "high pressure" area or "anticyclone" (A).
When atmospheric pressure decreases the sky
clouds over. The area is then referred to as a "low
pressure" area or "depression" (D). The T-TOUCH
measures these pressure variations and indicates
the weather trend with the hands, which can
adopt the following 7 positions according to the weather developments:
- 6’:
Big pressure drop, rapid deterioration
- 4’: Moderate pressure drop,
probable deterioration
- 2’: Small pressure drop,
probable slight deterioration
12 o'clock: No notable weather change
+ 2’:
Slight pressure rise,
probable slight improvement
+ 4’: Moderate pressure rise,
probable improvement
+ 6’: Big pressure rise,
rapid improvement
GLOSSARY > WEATHER
The T-TOUCH program takes account of atmospheric pressure variation over
the last 6 hours to calculate the trend to indicate. Furthermore, the pressure
variation caused by a rapid change in altitude is detected by the watch and
compensated for automatically. So it only has a minimal impact on the baro-
metric trend.
The T-TOUCH digital display indicates the
absolute and relative atmospheric pressure
values in hectoPascals [hPa]. Absolute at-
mospheric pressure is the actual pressure at
the time and place of measurement, and can-
not be altered. Relative pressure is a value
relative to sea level, based on local abso-
lute atmospheric pressure . Barometers and
weather charts show relative pressure values.
The relative pressure value depends on the climate zone set, and can be preset
on the watch. The relative pressure presetting is in line with the altitude.
Characteristics of function
Measurement range: absolute pressure: 300 hPa to 1100 hPa
relative pressure: 950 hPa to 1100 hPa
Accuracy: absolute pressure: ± 3 hPa
relative pressure: varies with altimeter
Resolution: 1 hPa
Unit conversion: 1 hectoPascal [hPa] = 1 millibar [mb]