E-56
To specify a reference altitude value
1. In the Altimeter Mode, pull out the crown.
•
This will cause the current altitude reading value to fl ash on the
digital display.
2. Rotate the crown to change the altitude value in one-meter (fi ve-foot)
increments.
•
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 –3,000
to 10,000 meters (–9,840 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. After the setting is the way you want, push the crown back in to exit the
setting screen.
E-57
Advanced Altimeter Mode Operations
Use the information in this section to obtain more accurate altimeter readings, especially while mountain
climbing or trekking.
Using an Altitude Differential Value
If you specify a reference altitude, the second hand of the watch will
indicate the difference between the current altitude and the reference
altitude. The displayed altitude differential value is updated each time the
watch obtains a new altitude reading value.
•
Depending on the currently selected display range, the allowable
range for the altitude differential value is 100 meters to –100 meters
(100 meters = 328 feet), or 1,000 meters to –1,000 meters (1,000
meters = 3,280 feet).
•
If a reading value is outside the allowable range either
OVER
(
) or
UNDER
(
) appears on the digital display.
•
The second hand will move to 9 o’clock if a sensor reading could not
be taken for some reason or if the reading is outside the allowable
range.
•
See “Using the Altitude Differential Value While Mountain Climbing or
Hiking” (page E-58) for some real-life examples of how to use this
feature.
Altitude differential
Altitude differential
E-58
Specifying the Altitude Differential Measurement Range
You can use the procedure below to select either ±100 meters or ±1,000
meters as the altitude differential measurement range.
Relative Altitude Measurement Range
Display Unit
±100 meters (±328 feet)
5 meters (16 feet)
±1000 meters (±3280 feet)
50 meters (164 feet)
To specify the altitude differential measurement range
1. In the Altimeter Mode, pull out the crown.
•
This will cause the current altitude reading value to appear.
2. Press
B
twice.
•
This will cause
DIFF
to appear on the digital display, along with the
fl ashing current altitude differential measurement range setting.
3. Rotate the crown to select either 100 meters (
100m
) or 1,000 meters
(
1000m
) as the altitude differential measurement range.
4. After the setting is the way you want, push the crown back in to exit the
setting screen.
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you can easily
measure the change in the altitude between that point and other points along the way.
Altitude differential
Altitude differential
E-59
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 altitude readings” (page
E-54) 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, hold down
D
for at least two seconds to specify your current location as the
altitude differential start point.
•
DIFF RESET
and then
RESET
will appear. The watch will take an altitude reading, and the second
hand will indicate the altitude differential. ±0 (±0 meters) will be displayed as the altitude
differential at the reference point.
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.
Altitude Differential (Reference
location, so ±0 m is indicated.)
Current altitude
Altitude Differential (Reference
location, so ±0 m is indicated.)
Current altitude
E-60
The altitude differential with the reference location is indicated by the second hand (altitude differential
indicator) as shown in the illustration below.
Unit: 50m (164ft)
Unit: Meters
Unit: 5m (16ft)
−100m (−328ft)
−1000m (−3280ft)
1000m (3280ft)
100m (328ft)
Example: Altitude differential
of −30 (300) meters
Indication range: ±100 (1000) meters
0
0
E-61
Types of Altitude Data
Your watch can record two types of altitude data in its memory: manually saved data and auto save
values.
•
Use the Data Recall Mode to view data stored in memory. See “Viewing Altitude Records” (page E-80)
for details.
Manually Saved 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 30 manually saved records, which are numbered from
-01-
through
-30-
.
To save a reading manually
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 altitude readings” (page E-54) for details.
2. Hold down
A
until
REC
fl ashes and then stops fl ashing.
•
This will save the currently displayed altitude reading in a manually
saved record, along with the time and date of the reading.
•
The watch will return to the Altimeter Mode screen automatically
after the save operation is complete.
•
There is enough memory to store up to 30 manually saved records.
If there are already 30 manually saved records in memory, the
above operation will cause the oldest record to be deleted
automatically to make room for the new one.
E-62
Auto Save Values
Auto save values are one type of data stored in the memory of your watch.
Auto Save Values
High Altitude (
MAX
)
Low Altitude (
MIN
)
Total Ascent (
ASC
)
Total Descent (
DSC
)
•
These values are checked and updated automatically by the watch as altitude auto measurements are
taken.
•
Auto save is performed only while the watch is in the Altimeter Mode.
•
Cumulative ascent and cumulative descent values are updated whenever there is a difference of at
least ±15 meters (±49 feet) from one reading to the next.
•
Auto save values also include the date and time each value was recorded.
How High and Low Altitude Values are Updated
With each auto save reading, the watch compares the current reading against the
MAX
(high altitude) and
MIN
(low altitude) values. It will replace the
MAX
value if the current reading is at least 15 meters (±49
feet) greater than
MAX
, or the
MIN
value if the current reading is at least 15 meters (±49 feet) less than
MIN
.
E-63
How Cumulative Ascent and Cumulative 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 reading operation 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
Operation Guide 5463