Operation Guide 3143
5
Notes
• Normally, displayed altitude values are based on the watch’s preset
conversion values. You also can specify a reference altitude, if you want.
See “Specifying a Reference Altitude”.
• Altitude is displayed in units of 5 meters (20 feet).
• The measurement range for altitude is –700 to 10,000 meters (–2,300 to
32,800 feet).
• 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
xxxx 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 measurement unit for displayed altitude values to either
meters (m) or feet (ft). See “To select the temperature, altitude, and
barometric pressure units”.
To select the altitude measurement type
1. In the Altimeter Mode, hold down A for about
two seconds until either OFF or the current
reference altitude value starts to flash. This is
the setting screen.
2. Press C to display the current altitude
measurement type setting.
• This will cause either 0’05 or 2’00 to flash
on the display.
3. Press D to toggle the altitude measurement
type setting between 0’05 and 2’00.
• 0’05: Readings at five-second intervals for
one hour
• 2’00: Readings at five-second intervals for
the first three minutes followed by two-
minute intervals for approximately nine
or 10 hours thereafter
4. Press A to exit the setting screen.
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Altitude measurement type
To select an Altimeter Mode display format
1. In the Altimeter Mode, hold down A for about
two seconds until either OFF or the current
reference altitude value starts to flash. This is
the setting screen.
2. Press C twice to display the format selection
screen.
• The number of the currently selected format
(1 through 4) will flash on the display.
3. Use D (+) and B (–) to scroll through the
available display format numbers (1 through 4).
• The contents of each of the Altimeter Mode
display formats are shown below.
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Display Format
Selection Screen
Display format number
4. Press A to exit the setting screen.
• If you selected display format 3 or 4, the watch will measure the altitude
differential. See “Altitude Differential” for more information.
Format 1 Format 2 Format 3 Format 4
Altitude
graph
Current time
Altitude
graph
Current
time
Altitude
Altitude
differential
Altitude
Current time
Altitude
Altitude
Current time
Altitude
differential
Saving Altitude Data
An altitude data save session saves data in two different records: periodic
records and a current session record.
To start a new save session
1. Press D to enter the Altimeter Mode.
2. Hold down D for about one second until REC
flashes on the display, which indicates that a
new session is in progress.
• After you start a save session, the watch
starts saving periodic records every 15
minutes. See “Periodic Records” for more
information.
• During a save session the watch also updates the current session
record. See “Current Session Record” for more information.
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• Once you start a save session, measurement continues to be
performed, and the REC indicator flashes on the display, even if you
change to another mode.
3. To stop an ongoing save session, hold down D for about one second until
REC disappears from the screen.
• The save session also will stop automatically when Periodic Record 40 is
stored.
• You can recall saved records using the Data Recall Mode.
Periodic Records
Periodic records of up to 40 altitude readings are taken during a save session.
• You can use the Data Recall Mode to view these records.
How periodic records are created and saved
The following operation is performed simultaneously with the operation
described under “How current session record data is updated”.
a. The watch creates Periodic Record 1 when you start a new save session.
Periodic Record 1 contains the current date (month and day), time, and
altitude.
• Each periodic record contains the current date (month and day), time,
and altitude.
b. After that, the watch takes readings and stores Periodic Records 2, 3, 4,
and so on at minute 00, 15, 30, and 45 of each hour.
c. After Periodic Record 40 is stored (or if you stop the save session
manually by holding down D), the watch will create a final periodic record,
which contains the current date (month and day), time, and altitude.
Current Session Record
The Current Session Record contains the data described below. The contents
of this record are updated at regular intervals while a save session is in
progress.
• The maximum total ascent and total descent value is 99,995 meters
(or 99,980 feet). Each value reverts to zero after the maximum is reached.
How current session record data is updated
The following operation is performed simultaneously with the operation
described under “How periodic records are created and saved”.
Data
High Altitude
(MAX)
Low Altitude
(MIN)
Total Ascent
(ASC)
Total Descent
(
DSC)
Description
Highest altitude reached during the current session.
Lowest altitude reached during the current session.
Total cumulative ascent during the current session.
Total cumulative descent during the current session.
a. When you hold down D to start a save session, the watch will clear data
that is already stored in the current session record.
b. The watch will measure altitude and calculate data as described below,
and update the current session record accordingly. Note that measurement
and saves depend on whether or not the watch is in the Altimeter Mode.
• In the Altimeter Mode
• Outside the Altimeter Mode
The measurements are taken and session data is updated every two
minutes, and at 00, 15, 30, 45 of each hour.
Altitude Measurement
Type
0’05
2’00
First 3 minutes
Updated every 5
seconds
Updated every 5
seconds
After 3 minutes
Updated every 5 seconds
Updated every 2 minutes, and
at 00, 15, 30, 45 of each hour
Other Altimeter Mode Features
This section explains other features and settings that are available in the
Altimeter Mode. Note that all of the information in this section applies to all
types of Altimeter Mode measurements, unless specifically indicated
otherwise.
Specifying a Reference Altitude
After you specify a reference altitude, the watch adjusts its air-pressure-to-
altitude conversion calculation accordingly. The altitude measurements
produced by this watch are subject to error caused by changes in air
pressure. Because of this, we recommend that you update the reference
altitude whenever one is available during your climb.
To set a reference altitude
1. In the Altimeter Mode, hold down A for about
two seconds until either OFF or the current
reference altitude value starts to flash. This is
the setting screen.
2. Press D (+) or B (–) to change the current
reference altitude value by 5 meters (or 20 feet).
• You can set the reference altitude within the
range of –10,000 to 10,000 meters (–32,800
to 32,800 feet).
• Pressing D and B at the same time returns to OFF (no reference
altitude), so the watch performs air pressure to altitude conversions
based on preset data only.
3. Press A to exit the setting screen.
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