Using the barometric pressure graph
Barometric pressure is affected by changes in weather and temperature. The following shows how to interpret the data that appears on the barometric pressure graph.
A rising graph generally means better weather.
A falling graph generally means deteriorating weather.
Note that if there are sudden changes in weather or temperature, the graph line of past measurements may run off the top or bottom of the display. The entire graph will become visible once barometric pressure conditions stabilize.
The following conditions cause the barometric pressure measurement to be skipped, with the corresponding point on the barometric pressure graph being left blank.
•Barometric reading that is out of range (460 hPa/mb to 1100 hPa/mb/13.55 inHg to 32.45 inHg).
•Sensor malfunction.
•Dead battery.
Selecting the unit of measurement
1.Use Cto enter the Barometer Mode.
2.Hold down Auntil “OFF” or the current barometric pressure value flashes on the display.
3.Press C to change to the measurement unit selection screen.
4.Each press of D or Bcycles the barometric pressure measurement unit as shown below.
| hPa |
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| mb |
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| inHg |
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5.After you select the measurement unit you want, press Ato return to the Barometer Mode screen.
•Note that all measurement data currently in memory is also deleted whenever you change the barometric pressure, altitude, or temperature unit of measurement.
Calibrating the barometric pressure measurement
The sensor of this watch is calibrated at the factory before shipment, and further adjustment is normally not required. If noticeable error is found in the barometric pressure readings produced by the watch, you can adjust it to correct the error.
Important!
Incorrectly calibrating the barometric pressure measurement of this watch can result in incorrect readings. Compare the readings produced by the watch with those of another reliable, accurate barometer.
Calibrating the barometric pressure
1.Use Cto enter the Barometer Mode.
2.Hold down A until “OFF” or the current barometric pressure calibration value flashes on the display.
•“OFF” appears when the factory setting is currently set as the current
barometric pressure calibration value.
3.Each press of Dincreases the displayed barometric pressure by 1 hPa/mb, while pressing B decreases it. Holding down either button changes the value at high speed.
•If inHg is currently selected as the unit of measurement, the above operations change the reading by 0.05 inHg.
•Pressing Band Dat the same time returns to the “OFF” setting.
4.After calibrating the barometric pressure, press A to return to the Barometer Mode screen.
ALTIMETER MODE
A
Important !
•This watch estimates altitude based on barometric pressure. This means that altitude readings for the same location may vary if barometric pressure changes.
•Sudden changes in the weather make it impossible to produce accurate altitude readings.
•This watch employs a semiconductor pressure sensor, which is affected by temperature changes. When taking altitude measurements, be sure to do so while ensuring that the watch is not exposed to temperature changes.
•Do not use this watch while participating in sports where there are sudden altitude changes. Also, do not use this watch for applications that demand professional or industrial level precision. This watch should not be used while engaging in the following activities: skydiving, hang gliding, paragliding, gyrocopter riding, glider riding, etc.
Applications
When no reference altitude is preset:
•The watch produces approximate altitude readings.
When a reference altitude is preset:
•Before beginning the climb, set the reference altitude to 0 meter at the foot of the mountain. This makes it possible to determine the difference in altitude between the reference point and your destination.
•To determine the height of a tall building, set the reference altitude to 0
meter on the ground floor. Note that you may not be able to get a good reading if the building is pressurized or air- conditioned.
•To determine the difference in altitude 
between your house and another location, set the reference altitude to 0 meter at your house, and then check the reading when you arrive at the other location.
•When mountain climbing, you can input the altitude from a marker as your reference altitude, which will then let you know your altitude as your climb
proceeds. The following conditions will | 400 |
prevent you from obtaining accurate readings:
When barometric pressure changes because of changes in the weather Extreme temperature changes
When the watch itself is subjected to strong impact
About altitude measurements
The watch measures altitude every five seconds for the first two minutes after you enter the Altimeter Mode. The Altimeter Mode indicator 1 flashes on the display during these two minutes.
After the first two minutes, the Altimeter Mode indicator 1 stops flashing, and the watch automatically takes measurements every two minutes (on even numbered minutes).
The display unit for Altimeter Mode measurements is 5 meters (20 feet), and the display range is 0 to 6,000 meters (0 to 19,680 feet).
•The measured altitude may be a negative value in cases where there is a reference altitude value set or because of certain barometric pressure conditions.
Altimeter Mode | Current altitude | |
indicator 1 |
| Unit of measurement |
| 5 seconds | |
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A | B later |
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| ▼ | 1250 |
AL |
| ▼ |
C | D | Press A. |
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| ▼ |
| Remaining memory |
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Altimeter Mode indicator 2 | 1250 | |
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Altitude graph