USER’S GUIDE 2471
With a Reference Altitude
•If you set a reference altitude, the watch uses that value when calculating altitude based on air pressure.
•To determine the height of a tall building, set the reference altitude to 0 on the ground floor. Note, however, that you may not be able to get a good reading if the building is pressurized or
•When mountain climbing, you can set the reference value in accordance with a marker along the way or altitude information from a map. After you do this, the altitude readings produced by the watch will be more accurate than they would without a reference altitude.
To take an altitude reading
B
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•Starting a new measurement automatically clears relative altitude, measurement time, maximum altitude, and total ascent values currently in memory.
•Starting a new measurement does not clear cumulative total ascent. This value continues to increase until it reaches 99,995 meters (327,983 feet). After that, it reverts to 0 and starts again.
•The interval between memory measurements depends on whether the Short Mode or the Long Mode is selected.
Short Mode:
Long Mode:
•Relative altitude, cumulative total ascent, and maximum altitude data is calculated at regular intervals, depending on the Long Mode/Short Mode setting. In both modes, calculations are performed every five seconds for the first three minutes. After that, calculations are performed every minute in the Short Mode and every two minutes in the Long Mode.
To select the Short Mode or Long Mode
1. In the Altimeter Mode, hold down A until the |
Pressing E in the Timekeeping Mode or in any of the other sensor modes enters the Altimeter Mode. The watch automatically starts altitude measurement, and displays the results.
Altitude graph (current altitude flashing) (unit: 10m/40 ft.)
Altitude
About one
second later
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Timekeeping Mode time
•See “About Altitude Measurements” for important information.
•Altitude is displayed in units of 5 meters (20 feet).
•The measurement range for altitude is
•The measured altitude may be a negative value in cases where there is a reference altitude value set or because of certain atmospheric conditions.
•The displayed altitude value changes to xxxxx meters (or feet) if a measured altitude falls outside the measurement range. The altitude value will be displayed again as soon as the measured altitude is within the allowable range.
•You can change the unit of measurement for the displayed altitude values between meters (m) and feet (ft). See “To change the Altitude Units”.
About Altitude Measurements
There are two types of altitude measurements: those for displayed data (Altimeter Mode measurements) and those for memory data (Memory measurements).
Altimeter Mode measurement
You can perform Altimeter Mode measurements in the Altimeter Mode only, and an altimeter measurement operation starts whenever you enter the Altimeter Mode.
During the first three minutes after entering the Altimeter Mode, ALTI flashes on the display and measurements are taken every five seconds. After that, the interval between measurements depends on whether you are using the Short Mode
•Long Mode is the default setting. See “Memory measurement” for information about the Short Mode and Long Mode.
•If you do not perform any operation while in the Altimeter Mode, the watch automatically returns to the Timekeeping Mode after four or five hours in the Short Mode, or after nine or 10 hours in the Long Mode.
Memory measurement
The memory measurement operation stores the following data in watch memory. Note that each time you perform a memory measurement operation, it creates a new set of records, replacing the set of records currently in memory. Memory measurement continues to be performed (indicated by the REC indicator flashing on the display) even if you change to another mode. Measurement start time, date, and altitude: 1 record
Automatic altitude readings and time, at fixed interval: Up to 39 records
Measurement end time, date, and altitude: 1 record
The watch also calculates the following values using measured data and maintains one record for each in memory.
Relative altitude (altitude difference between start point and current altitude or measurement end altitude)
Measurement time
Maximum altitude (highest measured altitude in memory) Total ascent (total of ascents (A + B))
Cumulative total ascent (total of all measured altitude values in memory)
Maximum altitude | Stop point |
B
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| • OFF indicates no reference altitude. |
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| measurement operation is in progress. |
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| 4. Press A to exit the setting screen. |
To perform memory measurement | ||||||||||
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| Hold down E for about one second until REC |
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| measurement has started. |
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| • Memory measurement stops automatically |
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• While a memory measurement operation is in progress, press A to toggle between the Standard Altitude screen and the Relative Altitude screen.
| Standard Altitude | Relative Altitude | |
| Screen | Screen | |
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| Relative altitude | |
Altitude |
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| Timekeeping Mode time | REL indicator Measurement time |
Note
•REC flashes on the display while a memory measurement operation is in progress.
•Starting the memory measurement operation deletes any altimeter data (except for cumulative total ascent data) currently in memory (and its graph) and replaces it with the new data. Note that you cannot delete memory contents manually.
•You can recall data in memory using the Data Recall Mode.
Setting a Reference Altitude
After you set a reference altitude, the watch adjusts its
To set a reference altitude
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| 1. | In the Altimeter Mode, hold down A until the |
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| value (if set) starts to flash, which indicates |
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| the setting screen. | |
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l l l l l l | 2. | Press E (+) or B | |
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reference altitude value by 5 meters (or 20 feet).
• You can set the reference altitude within the range of
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