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Operation Guide 3022
3
How the Altimeter Measures Altitude
The altimeter can measure altitude based on its own preset values, or a
reference altitude specified by you.
When you measure altitude based on preset values
Data produced by the watch’s barometric pressure sensor is converted to
approximate altitude based on ISA (International Standard Atmosphere)
conversion values stored in watch memory.
When you measure altitude using a reference altitude specified by you
After you specify a reference altitude, the watch uses that value to convert the
current measured barometric pressure value to altitude.
• To determine the height of a tall building, for
example, specify zero for the reference
altitude value while you are on the ground
floor. Then when you go to a higher floor, the
altitude displayed by the watch will indicate
the height from the ground floor. Note that
you may not be able to get a good reading if
the building is pressurized or air-conditioned.
• When mountain climbing, you can set the
reference value in accordance with a marker
along the way or altitude information from a
map. After that, the altitude readings
produced by the watch will be more accurate
than they would without a reference altitude.
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Displaying Your Current Altitude
You can use the procedure described in this section to display your current
altitude. If you leave the watch in the Altimeter Mode, it will update the
displayed altitude value regularly and indicate reading-to-reading changes in
the altitude graph.
You can select either of the two altitude measurement types described below.
SHORT: Readings at five-second intervals for one hour
LONG: Readings at five-second intervals for the first three minutes followed
by two-minute intervals for approximately nine or 10 hours
• For information about configuring settings for the altitude reading interval
and duration, see “To select the altitude measurement type”.
Important!
• The procedure in this section simply displays values indicating your current
altitude, without storing them in watch memory. For information about
recording altitude readings in watch memory, see “Altitude Records”.
To display your current altitude
1. Press D in the Timekeeping Mode or
Barometer/Thermometer Mode to enter the
Altimeter Mode.
• The watch will start altitude measurement
automatically and display the result.
• It can take up to four or five seconds for the
altitude reading to appear after you enter
the Altimeter Mode.
Current altitude
Altitude graph
Timekeeping
Mode time
Altitude alarm on
indicator
Altitude Graph Screen
2. If you want the altitude value and altitude
graph to be updated in accordance with the
altitude measurement type (interval and
duration) you have selected, leave the watch
in the Altimeter Mode.
• In the Altimeter Mode, press A to toggle
the display between the Altitude Graph
screen and the Altitude Alarm Differential
screen.
• For details about the altitude alarm
differential, see "Altitude Alarm".
• If you want to restart the altitude
measurement operation at any point, press
D.
3. To stop the altitude measurement operation,
press C to exit the Altimeter Mode.
Current altitude
Altitude
differential
pointer
Altitude alarm value
differential
Altitude Alarm
Differential Screen
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
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 measurement unit for displayed altitude values to either
meters (m) or feet (ft). See “To select the temperature, barometric pressure,
and altitude units”.
To select the altitude measurement type
1. In the Altimeter Mode, hold down A.
•
This will cause SET to appear on the display.
2. Release A and wait for four or five more
seconds until either
OFF or the current
reference altitude value (if set) starts to flash.
This is the setting screen.
3. Press C twice to display the current altitude
measurement type setting.
• This will cause either SHORT or LONG to
flash on the display.
4. Press D to toggle the altitude measurement type setting between SHORT
and LONG.
• SHORT: Readings at five-second intervals for one hour
• LONG : Readings at five-second intervals for the first three minutes
followed by two-minute intervals for approximately nine or 10 hours
thereafter
5. Press A to exit the setting screen.
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Altitude measurement type
Altitude Records
Storing altitude data in memory creates an altitude record. If a reading is
greater than all of the other altitude readings currently stored in memory, it is
stored in the maximum altitude record. The following describes the contents
of each type of record.
Recording date (year, month, day), time (hour, minutes) and altitude: Up to 40
records
Maximum altitude (including recording date and time): 1 record
• The maximum altitude record shows information about the altitude record
that has the greatest altitude value. The maximum altitude record is
updated any time a reading produces an altitude that is greater than that of
the current maximum altitude record.
To store an altitude record in memory
In the Altimeter Mode, hold down D for about
one second until the watch beeps twice. This
indicates that a record of the altitude reading has
been stored in memory.
• You can recall data in memory using the Data
Recall Mode.
• Note that there is enough memory to store a
total of 40 records. If there are 40 records
already in memory, storing another one deletes
the oldest record automatically to make room
for the new one.
To view altitude record data
1. Use C to enter the Data Recall Mode.
2. Use D and B to cycle through the altitude record screens in the
sequence shown below.
Maximum Data
Press D.
Oldest Data
Altitude
Recording date
(Year Month – Day)
Recording time
(Hour : Minutes)
▲
Newest Data
▲
▲
▲
▲
Press B.
▲
• The maximum altitude record appears first. After that, each press of D or
B scrolls through records in sequence.
• If an error occurs while altitude data is being stored in memory or if there is
no altitude data in memory,
x
xxxx is shown for the measured altitude
value on the corresponding altitude record screen.
Deleting All Altitude Record Data
Use the following procedure to delete all altitude record data, including the
maximum altitude record. Note that deletion of individual altitude records is
not supported.
To delete all altitude record data
1. In the Data Recall Mode, press A.
• This will cause CLEAR to appear on the display, letting you know that
data is about to be deleted.
2. Keep A depressed for about three more seconds, until CLEAR starts to
flash. You can release A at this time.
• CLEAR will continue to flash after all of the data is deleted. After that, the
display will change to “xxxx”, which indicates that there is no data in
memory.