Operation Guide 3259
E-48
Note
•
The measurement range for altitude is –700 to 10,000 meters (–2,300 to 32,800 feet).
•
The displayed altitude value changes to
- - - -
if an altitude reading falls outside the measurement
range. An altitude value will reappear as soon as the altitude reading is within the allowable range.
•
Normally, displayed altitude values are based on the watch’s preset conversion values. You also can
specify a reference altitude value, if you want. See “Specifying a Reference Altitude Value” (page E-52).
•
You can change the unit for displayed altitude values to either meters (m) or feet (ft).
See “To specify temperature, barometric pressure, and altitude units” (page E-61).
Selecting an Altitude Auto Measurement Method
You can select either of the following two altitude auto measurement methods.
0’05
: Readings at fi ve-second intervals for about one hour
2’00
: Readings at fi ve-second intervals for the fi rst three minutes followed by two-minute intervals for
approximately 24 hours
Note
If you do not perform any button operation while in the Altimeter Mode, the watch will return to the
Timekeeping Mode automatically after 24 hours (altitude auto measurement method:
2’00
) or after one
hour (altitude auto measurement method:
0’05
).
E-49
To select the altitude auto measurement method
1. In the Altimeter Mode, hold down
E
until
SET Hold
appears on the
display and then
Hold
disappears.
2. Press
D
to display the current altitude auto measurement method
setting.
•
This will cause either
0’05
or
2’00
to fl ash on the display.
3. Press
A
to toggle the altitude auto measurement method setting
between
0’05
and
2’00
.
4. Press
E
to exit the setting screen.
E-50
Using the Altitude Differential Value
The Altimeter Mode screen includes an altitude differential value that
shows the change in altitude from a reference point you specify. The
altitude differential value is updated each time the watch takes an altitude
reading.
•
The range of the altitude differential value is –3,000 meters (–9,980
feet) to 3,000 meters (9,980 feet).
•
- - - -
is displayed in place of the altitude differential value whenever
the measured value is outside the allowable range.
•
See “Using the Altitude Differential Value While Mountain Climbing or
Hiking” (page E-51) for some real-life examples of how to use this
feature.
To specify the altitude differential start point
In the Altimeter Mode, press
E
.
•
The watch will take an altitude reading and register the result as the
altitude differential value start point. The altitude differential value will
be reset to zero at this time.
Altitude differential
Altitude differential
Altitude differential
Altitude differential
E-51
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you easily can
measure the change in the altitude between that point and other points along the way.
To use the altitude differential value
1. In the Altimeter Mode, check to make sure that an altitude reading is
on the display.
•
If an altitude reading is not displayed, press
A
to take one. See “To
take an altimeter reading” (page E-47) for details.
2. Use the contour lines on your map to determine the difference in
altitude between your current location and your destination.
3. In the Altimeter Mode, press
E
to specify your current location as the
altitude differential start point.
•
The watch will take an altitude reading and register the result as
the altitude differential value start point. The altitude differential
value will be reset to zero at this time.
4. While comparing the altitude difference you determined on the map
and the watch’s altitude differential value, advance towards your
destination.
•
If the map shows that the difference in altitude between your
location and your destination is +80 meters for example, you know
you will be nearing your destination when the displayed altitude
differential value shows +80 meters.
Current
location
Destination
altitude
Current
location
Destination
altitude
Altitude
Altitude differential
Altitude
Altitude differential
E-52
Specifying a Reference Altitude Value
The altitude readings 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 value whenever one is available
during your climb. After you specify a reference altitude value, the watch adjusts its air-pressure-to-altitude
conversion calculation accordingly.
To specify a reference altitude value
1. In the Altimeter Mode, hold down
E
until
SET Hold
appears on the
display and then
Hold
disappears.
2. Press
A
(+) or
C
(–) to change the current reference altitude value
by 5 meters (or 20 feet).
•
Change the reference altitude value to an accurate altitude reading
that you get from a map or other source.
•
You can set the reference altitude value within the range of –10,000
to 10,000 meters (–32,800 to 32,800 feet).
•
Pressing
A
and
C
at the same time returns to
OFF
(no reference
altitude value), so the watch performs air pressure to altitude
conversions based on preset data only.
3. Press
E
to exit the setting screen.
E-53
Types of Altitude Data
The watch can maintain two types of altitude data in its memory: manual measurement records, and auto
save values (low altitude, high altitude, total ascent, total descent).
•
Use the Data Recall Mode to view data stored in memory. See “Viewing Altitude Records” (page E-64)
for details.
Manual Measurement Records
Any time you perform the procedure below in the Altimeter Mode, the watch will create and store a record
with the currently displayed altitude reading, along with the date and time the reading was taken. There is
enough memory to store up to 14 manual measurement records, which are numbered from
REC 1
through
REC 14
.
To save a manual measurement
1. In the Altimeter Mode, check to make sure that an altitude reading is
on the display.
•
If an altitude reading is not displayed, press
A
to take one. See “To
take an altimeter reading” (page E-47) for details.
2. Hold down
A
until
REC Hold
appears on the display and then
changes to
REC
.
•
This will save the currently displayed altitude reading in a manual
measurement record, along with the measurement time and date.
•
The watch will return to the Altimeter Mode screen automatically
after the save operation is complete.
•
There is enough memory to store up to 14 manual measurement
records. If there are already 14 manual measurement records in
memory, the above operation will cause the oldest record to be
deleted automatically to make room for the new one.
E-54
Auto Save Values
Two sets of auto save values (Set 1 and Set 2) are maintained in watch memory.
Set 1
Set 2
High Altitude (
MAX-1
)
Low Altitude (
MIN-1
)
Total Ascent (
ASC-1
)
Total Descent (
DSC-1
)
High Altitude (
MAX-2
)
Low Altitude (
MIN-2
)
Total Ascent (
ASC-2
)
Total Descent (
DSC-2
)
•
These values are checked and updated automatically by the watch as altitude auto measurements are
taken.
How High and Low Values Are Updated
While the watch is in the Altimeter Mode, altitude readings are taken automatically at the interval specifi ed
by the altitude auto measurement method (page E-48). With each reading, the watch compares the
current reading against the
MAX
(
MAX-1
and
MAX-2
) (high altitude) and
MIN
(
MIN-1
and
MIN-2
) (low
altitude) values. It will replace the
MAX
value if the current reading is greater than
MAX
, or the
MIN
value
if the current reading is less than
MIN
.
E-55
How Total Ascent/Descent Values Are Updated
Session start point
20 m
0 m
120 m
320 m
620 m
Session end point
The total ascent and total descent values produced by an Altimeter Mode measurement session during
the example climb illustrated above are calculated as follows.
Total Ascent:
q
(300 m) +
e
(620 m) = 920 m
Total Descent:
w
(320 m) +
r
(500 m) = 820 m
•
Entering the Altimeter Mode starts a new altitude auto measurement session, but it does not reset the
current
ASC
(
ASC-1
and
ASC-2
) and
DSC
(
DSC-1
and
DSC-2
) values or change them in any way.
This means that the starting
ASC
and
DSC
values for a new Altimeter Mode auto measurement session
are the values that currently are in memory. Each time you complete an Altimeter Mode auto
measurement session by returning to the Timekeeping Mode, the total ascent value of the current
session (920 meters in the above example) is added to the session’s starting
ASC
value. Also, the total
descent value of the current auto measurement session (
–
820 meters in the above example) is added
to the session’s starting
DSC
value.
