Notes on calibrating the Altimeter and Barometer
The watch relies on a sensitive electronic sensor to
measure the air pressure and temperature. This sensor
must be calibrated periodically to maintain the high degree
of accuracy you expect from the watch.
What is calibration?
“Calibration” is simply a technique to improve the accura-
cy of the pressure/temperature sensor, primarily by com-
pensating for local temperature and weather effects. The
watch employs two related methods of calibration, using
either sea level pressure or the local altitude as a refer-
ence, depending on the watch mode used for calibration.
How often should I calibrate?
Timex recommends that you calibrate the sensor prior to
any activity where you will be using the altimeter feature
Weather Forecasting
The watch can predict the weather for the upcoming 4 - 6
hour period based on the air pressure trend information for
the previous twelve hours. The weather forecast is indicated
at the top of the watch display by a series of symbols.
Generally, if the air pressure is rising, the weather situation is
considered to be improving and is indicated by the presence
of the sun symbol. If the air pressure trend is falling, then the
weather situation is worsening and is indicated by showing
the clouds and/or precipitation symbols.
The weather forecast is always visible in TIME and BARO
modes and visible in ALTI mode when no altitude changes
are detected.
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