Timex Expedition WS4 User Manual

Page 12

As it is an inverse relationship between altitude and barometric
pressure, if I wake at the same or lower elevation I can be confident
the atmospheric pressure has remained constant. If I rise to a higher
altitude I need to be aware as there is a chance a low pressure is
moving in.”

-Conrad Anker
World-Renowned Mountaineer

BAROMETER MODE

Your watch includes information about current and sea level pressure, high or
low barometric information, and changes in sea level pressure over the most
recent 36 hours. These features are useful for understanding changes in
weather.

Operating the Barometer
Once in BARO Mode, the watch automatically scrolls through:

• Highest reached barometric pressure.
• Lowest barometric pressure.

4. Press MODE (NEXT) to advance to the next setting option.
5. Press SET (DONE) to finish.

NOTE: The altimeter will display in either FT (feet) or M (meters)
depending on which display unit you chose in Time Mode.
See page 14 for information on setting units of measurement.

ATTENTION: Your altimeter is sensitive to weather changes! Sudden
changes in barometric pressure can change your altimeter reading by
+/- 100 meters even if you have stayed in the same location. If
possible, re-calibrate to a known altitude when drastic pressure
changes occur.

You only need to calibrate barometer OR altimeter, since they rely
on the same pressure. See Calibration Mode on page 36 for more
information.

“Before I curl into my sleeping bag I note the current altitude and baro-
metric pressure. In the few hours I sleep if I see a change in altitude or
barometric pressure I can get an idea of the coming weather patterns.

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