www.tissot.ch
154_EN
11/21
T-TOUCH SOLAR E84
The T-TOUCH SOLAR E84 program takes account of atmospheric pressure vari-
ation 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
barometric trend.
The T-TOUCH SOLAR E84 digital display
indicates the absolute and relative atmos-
pheric pressure values in hectoPascals [hPa].
Absolute atmospheric pressure is the actual
pressure at the time and place of measure-
ment, and cannot be altered. Relative pres-
sure is a value relative to sea level, based
on local absolute 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]
METEO (WEATHER) >
GLOSSARY
Description of function
In weather mode, the hands are superimposed
to indicate the weather trend.
Explanations
Weather changes are related to variations in
atmospheric pressure. When atmospheric pres-
sure increases the sky clears. The area is then
referred to as a "high pressure" area or "anticy-
clone" (A). When atmospheric pressure decreas-
es the sky clouds over. The area is then referred
to as a "low pressure" area or "depression" (D).
The T-TOUCH SOLAR E84 watch 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
ALTIMETER >
READING
Activate glass
Altitude
display
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 altitude unit system for displaying the altitude (m or ft) depends on the m/ft unit configuration in the options (see page 8).
:
up 1 m or 3 ft
:
down 1 m or 3 ft
Validate setting
Setting
mode
Altitude
display
ALTIMETER >
ALTITUDE PRESETTING
1 sec.
2 sec.
or
or
Altitude difference
function display
(see page 12)
