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T-TOUCH SOLAR E81
COMPASS >
CALIBRATION
Compass calibration
display
Activate
calibration
mode – glass deactivated
during calibration
b) Calibration failed – repeat calibration
Back to
compass
display
Turn the watch more than a complete revolution on
a horizontal surface (e.g. a table) in an environment
free from magnetic interference, at a rotation speed
of around 30° per second.
Total time: 20 seconds maximum
a) Calibration successful – data stored
2 sec.
1 sec.
Compass
In compass mode, your T-TOUCH SOLAR E81
indicates the True North Pole, factoring in
magnetic declination.
Compass explanations
The vertical lines (meridians) on the Earth converge at the True North Pole
(Ng), indicating its direction. The hand of a conventional compass indicates
the direction of the Magnetic North Pole (Nm).
The angle (
α
) between these two directions Ng
and Nm is known as magnetic declination. The
magnetic declination value depends on your
location on Earth. Furthermore, the Magnetic
North Pole is constantly moving. So the mag-
netic declination value also depends on the
date. If the correct magnetic declination value
(for the location and date) is set (see the set-
ting procedure on page 12), the minute hand
of your T-TOUCH SOLAR E81 will point to True
North (Ng). If the magnetic declination is set to 0, your T-TOUCH SOLAR E81
will point to Magnetic north (Nm). The magnetic declination values and dates
are indicated on topographic charts, or can be found using special software
available on the Internet.
For Switzerland: http://www-geol.unine.ch/geomagnetisme/Representation.htm
For the whole world: http://geomag.usgs.gov/
Note 1
For a correct indication of North, it is extremely important to hold the watch
as level as possible.
Note 2
The compass function, like any other compass,
should not be used near a metal or magnetic
mass. In case of doubt, you can recalibrate your
compass.
Characteristics of function
Accuracy:
± 8°
Resolution: 2°
COMPASS >
GLOSSARY
