the same barometric pressure, display values (for altitude and barometric
pressure) may change if the temperature changes.
PROHIBITED
-
Prohibited Uses of Altitude and Barometric
Pressure Measurement Functions
Do not use the altitude or barometric pressure measurement function of this
watch under the following conditions:
• When behavior or the situation is judged to be dangerous
• When there are sudden changes in barometric pressure and temperature
due to changes in weather conditions
• When barometric pressure is being adjusted such as in an airplane or building
• When altitude changes greatly in a short time (such as when skydiving)
CAUTION
-
Pressure Sensor
• The pressure sensor used in this watch is a high-precision device. Never
attempt to disassemble it or poke it with a sharp object.
• The altitude measurement function may not operate properly if air is not
allowed to flow to the sensor. Be careful to prevent debris and dust from
entering the sensor as much as possible. In case debris, dust or other dirt
becomes trapped in the sensor, rinse the sensor with fresh water. If the
debris cannot be removed by rinsing, please consult a Citizen Service Center.
17
B. Use of Altimeter and Barometer
CAUTION
-
Altitude and Barometric Pressure Measurement Functions
• The altitude displayed by this watch is approximate altitude as calculated by
applying external barometric pressure as detected with a pressure sensor to
the relationship between altitude and barometric pressure of an international
standard atmospheric model. Consequently, even when altitude is measured
at the same location, the displayed altitude varies if the barometric pressure
changes. In order to measure altitude correctly, it is necessary to always
correct altitude at a location where the correct altitude is clearly indicated.
For further details, refer to Section 15 entitled, “Altimeter Basic Features”.
• Since barometric pressure displayed by this watch is the external barometric
pressure detected by a pressure sensor at the location of the measurement,
the displayed barometric pressure changes if altitude changes. In addition, it
also differs from the barometric pressure indicated on weather maps (baro-
metric pressure converted to that at 0 m above sea level). Use the baromet-
ric pressure measurement function of this watch as a general reference for
monitoring changes in barometric pressure at the same location.
• Both the altitude and barometric pressure measurement functions of this
watch are subject to the effects of temperature changes. Even in the case of
16
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