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Operation Guide 3147
5
Current Stopwatch Session Record
The current stopwatch session record contains the data described below. The
contents of this record are retained until you start a new Altimeter Mode
stopwatch measurement session.
• 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 Altimeter Mode stopwatch session record data is updated
Note
• When you press E to start a new Altimeter Mode stopwatch session, the
watch will clear data that is already stored in the current stopwatch session
record.
Data
High Altitude
(MAX)
Low Altitude
(MIN)
Total Ascent
(ASC)
Total Descent
(
DSC)
Description
Highest altitude reached during the current Altimeter Mode
stopwatch session.
Lowest altitude reached during the current Altimeter Mode
stopwatch session.
Total cumulative ascent during the current Altimeter Mode
stopwatch session.
Total cumulative descent during the current Altimeter
Mode stopwatch session.
• The watch takes altitude readings and calculates data as described below,
and updates the current stopwatch 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
Readings are taken and session data is updated every two minutes.
Historical Record
The historical record keeps track of high altitude, low altitude, total ascent, and
total descent values across multiple Altimeter Mode stopwatch sessions. The
contents of this record are updated continually while an Altimeter Mode
stopwatch operation is in progress.
Altitude Measurement
Interval
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
How the historical record is updated
The watch performs the following operations continually while an Altimeter
Mode stopwatch operation is in progress.
Data
High Altitude
Low Altitude
Total Ascent
Total Descent
Update Operation
The historical record value is compared with the current
reading and the greater of the two is recorded in the
historical record.
The historical record value is compared with the current
reading, and the lesser of the two is recorded in the
historical record.
The current Altimeter Mode stopwatch session value is
added to the historical record value.
• See “Clearing the Historical Record” for information about clearing the
historical record, which restarts all data values from zero.
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 specify 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 E (+) or B (–) to change the current
reference altitude value by 5 meters (or 20 feet).
• You can specify the reference altitude within
the range of –10,000 to 10,000 meters
(–32,800 to 32,800 feet).
• Pressing E 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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Altitude graph
The altitude graph shows Altimeter Mode
measurement results.
• The vertical axis of the graph represents
altitude, and each dot stands for 10 meters (40
feet).
• The horizontal axis represents time, and the flashing dot in the rightmost
column indicates the latest measurement result. For the first three minutes,
each dot represents five seconds. After that, each dot represents two
minutes.
• An out of range measurement result or a measurement error will cause the
column of dots for that measurement to be blank (skipped).
Time
Altitude
Recalling Altitude Data
Use the Data Recall Mode to view altitude records currently in memory, as
well as the current Altimeter Mode stopwatch session record, and the
historical record. Altitude records are created and stored by the watch in the
Altimeter Mode.
Data Screens
The following explains the contents of each of the screens that appear in the
Data Recall Mode.
Note
• While an altitude record screen, or the high altitude or low altitude screen is
displayed, the bottom part of the display alternates between the
measurement date (month and day) and measurement time, at 1-second
intervals.
Altitude
Measurement date
(Month – Day)
Alternates at
1-second intervals.
Measurement time
(Hour : Minutes)
Record
name
▲
▲
Altitude Records
These are records of the 20 newest altitude readings taken with the watch by
you. If you take more than 20 readings, the watch will delete the oldest
readings to make room for the newest readings.
Current Stopwatch Session Record
The following data items are included in the current stopwatch session record.
Data Type
High Altitude
Low Altitude
Total Ascent
Total Descent
Description
Highest altitude reached during the last
Altimeter Mode stopwatch session.
Lowest altitude reached during the last
Altimeter Mode session.
Total cumulative ascent during the last
Altimeter Mode session.
Total cumulative descent during the last
Altimeter Mode session.
Screen Name
MAX
MIN
ASC
DSC
Historical Record
The historical record contains data for all Altimeter Mode stopwatch sessions
performed since the last time the historical record was cleared.
Data Type
High Altitude
Low Altitude
Total Ascent
Total Descent
Description
Highest altitude reached during all
Altimeter Mode stopwatch sessions.
Lowest altitude reached during all
Altimeter Mode stopwatch sessions.
Total cumulative ascent during all Altimeter
Mode stopwatch sessions.
Total cumulative descent during all
Altimeter Mode stopwatch sessions.
Screen Name
MAX
MIN
ASC
DSC