8）Mechanism Of Altitude Measurement; How To Use The Barometer Thermometer Mode (Baro); 1）Buttons And Functions; 2）Explanation Of Display - Seiko S830 Instructions Manual

③ W hen checking is fi nished, press Button Ⓐ to return to the altimeter display.
Even if Button Ⓐ is not pressed, the display automatically returns to the al-
timeter display within 2 to 3 minutes.
④ T o delete mountaineering records, press and hold Button Ⓒ while the REC mark
is off . Hold down the button Ⓓ continuously after CLR? ALL appears. When
the outer circumference graphic rotates once, all the mountaineering records
stored in the body of the watch are deleted with a confi rmation sound. They
cannot be deleted individually.
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※ D uring recording of a mountaineering record, the mountaineering plans cannot be de-
leted.
※ T he mountaineering records stored on the application side are not deleted with opera-
tion of the watch.
Ⓒ
Ⓒ
Press and hold
Altitude measurement Mountaineering record indication
display
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How to use the barometer thermometer mode (BARO)
The atmospheric pressure and temperature are measured and displayed.
Atmospheric pressure is automatically measured every 1 hour, and the atmospheric
pressure tendency is displayed in a graph at the top row of the display. Atmospheric
pressure at the middle row, and temperature at the bottom row are shown.
（１）Buttons and functions
・ P ress Button Ⓐ to switch to the barometer/thermometer mode. After "BARO" ap-
pears at the top row of the display, current atmospheric pressure, temperature
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and graphic pressure tendency are shown.
Button Ⓑ Button Ⓒ
Button Ⓓ
Button Ⓐ Button Ⓔ
Button Ⓕ
【CAUTION】 T he thermometer is aff ected by body temperature or direct sunlight. When
measuring ambient temperature, remove the watch from your arm and mea-
sure after some time has elapsed.
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Ⓓ
Press and hold
Ⓓ
A confirmation
sound beeps.
Completion of
deletion
Button Ⓐ : To switch to the compass mode
Button Ⓐ (Press and hold): To switch to the altimeter mode
Button Ⓑ : To switch to the watch function
Button Ⓒ : No function
Button Ⓓ : No function
Button Ⓔ : To measure the atmospheric pressure and
temperature
Button Ⓕ : To turn on the built-in illuminating light
Button Ⓕ (Press and hold): To switch to the Bluetooth mode
（8） Mechanism of altitude measurement
・ T his product adopts a method to estimate altitude using the relationship between altitude and atmospheric
pressure of the International Standard Atmosphere specifi ed by the International Civil Aviation Organization.
・ U sing a reference altitude set at a place where the correct altitude is known in advance, the watch mea-
sures the diff erence in altitude based on the change in atmospheric pressure from there and display the
result as the current altitude.
I n the illustration below, the altitude is corrected at a starting point for a trail etc. (200 m). Then, the diff er-
ence in altitude (400 m) generated by movement is measured and is combined with the corrected value,
and then the altitude (600 m) after movement is displayed.
・ B ecause a change in atmospheric pressure is converted into altitude, display of the altitude also changes
when atmospheric pressure changes even when altitude is measured at the same position.
(Current altitude = Corrected value + Measured value)
Indicator etc.
200m
Above sea level
Sea surface
【CAUTION】Correct measurements cannot be made under the following conditions.
・When atmospheric pressure changes depending on weather condition
・When atmospheric temperature signifi cantly changes
・ When this product receives a strong impact
【Caution】 W hen water runs directly from a faucet onto the watch, very high water pressure is applied. The measurement
accuracy of the sensor to measure pressure temporarily degrades, and the values of altitude and atmospher-
ic pressure may fl uctuate. If very high water pressure is applied to the body of the watch, wait for about 10
minutes or more until the measurement accuracy of the pressure sensor recovers and then measure again.
（２）Explanation of display
Atmospheric pressure tendency graph：
Atmospheric pressure is automatically measured every 1 hour and atmospheric
pressure tendency is displayed in a graph.
Current atmospheric pressure：
Automatically measured or manually measured atmospheric pressure is displayed.
Display unit： 1hpa, 0.01inHg
Measurement range：between 300 and 1100 hpa, between 8.85 and 32.48 inHg
Current temperature：
Display unit：0.1℃, 0.1℉
Measurement range：between ｰ10.0 and 60.0℃, between ｰ14.0 and 140.0℉
※ W hen temperature measurement result exceeds the measurement range, "- - - -" is displayed.
※ A lthough atmospheric pressure can be measured in any mode, measurement is stopped when the
battery is depleted and battery life indicator changes to (
※ D ot displaying atmospheric pressure tendency represents 2 hPa (0.06 inHg) per vertical 1 dot and 1 hour
per horizontal 1 dot. 21 dots are displayed in a horizontal direction to indicate atmospheric pressure tendency
for 20 hours in the past. Within a range of 5 vertical dots, atmospheric pressure tendency is indicated.
※ A s altitude changes, atmospheric pressure also changes. Atmospheric pressure tendency cannot
be accurately measured when signifi cant changes in altitude occur. Measure atmospheric pressure
at a place of known altitude such as a mountain lodge to check the atmospheric pressure tendency.
When using the atmospheric pressure tendency, measure in a mountain cottage, etc., where the
altitude does not change.
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600m
Measurement
（400ｍ）
Correction
167
4
).
（Flashing）
169