Operation Guide 3043
5
To turn display of the barometric pressure differential pointer on
and off
1. In the Barometer/Thermometer Mode, hold
down
E
until
SET
appears in the upper
display area.
2. Release
E
, and wait for four or five more
seconds until either
OFF
or the current
reference temperature value (if set) starts to
flash. This is the setting screen.
3. Press
D
twice to display the pointer on/off
setting screen.
4. Press
C
to toggle display of the barometric
pressure differential pointer on (
ON
displayed)
and off (
OFF
displayed).
5. When the setting is the way you want, press
E
to exit the setting screen.
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About Barometric and Temperature Measurements
•
Barometric pressure and temperature measurement operations are
performed as soon as you enter the Barometer/Thermometer Mode. After
that, barometric pressure and temperature measurements are taken every
five seconds.
•
The
ACT
indicator flashes on the display while a measurement is in
progress.
•
You can also perform a barometric pressure and temperature measurement
at any time by pressing
B
in the Barometer/Thermometer Mode.
Altimeter
The watch’s altimeter uses a pressure sensor to detect current air pressure,
which is then used to estimate the current altitude based on ISA (International
Standard Atmosphere) preset values. You can also specify a reference
altitude, which the watch will use to calculate your current altitude based on
the value you specify. Altimeter functions also include storage of
measurement data in memory and an altitude alarm.
Important!
•
This watch estimates altitude based on air pressure. This means that
altitude readings for the same location may vary if air pressure changes.
•
The semiconductor pressure sensor used by the watch for altitude
measurements is also affected by temperature. When taking altitude
measurements, make sure the watch is not subjected to temperature
changes.
•
To avoid the effect of sudden temperature changes during measurement,
keep the watch on your wrist in direct contact with your skin.
•
Do not rely upon this watch for altitude measurements or perform button
operations while sky diving, hang gliding, or paragliding, while riding a
gyrocopter, glider, or any other aircraft, or while engaging in any other
activity where there is the chance of sudden altitude changes.
•
Do not use this watch for measuring altitude in applications that demand
professional or industrial level precision.
•
Remember that the air inside of a commercial aircraft is pressurized.
Because of this, the readings produced by this watch will not match the
altitude readings announced or indicated the flight crew.
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.
400
B
A
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 at the top of the display.
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 “Saving Altitude Data”.
To display your current altitude
1. Press
C
in the Timekeeping Mode or in any
of the other sensor modes 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.
2. Leave the watch in the Altimeter Mode if you
want the displayed altitude value and the
altitude graph contents to be updated at
regular intervals.
•
During the first three minutes after entering
the Altimeter Mode, the
ACT
indicator will
flash on the display as measurements are
taken every five seconds. After that, the
ACT
indicator will disappear and
measurements will be taken every two
minutes.
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Current altitude
Altitude graph
Timekeeping
Mode time
Altitude
differential
pointer
•
If you want to restart the altitude measurement operation at any point,
press
C
.
3. To stop the altitude measurement operation, press
D
to exit the Altimeter
Mode.
Notes
•
Normally, displayed altitude values are based on the watch’s preset
conversion values. You can also 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
x
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, barometric pressure,
and altitude units”.
Saving Altitude Data
The save operation described in this section creates records of altitude
measurement data in watch memory. When you start a save session,
measurement continues to be performed (indicated by the
REC
indicator
flashing on the display) even if you change to another mode.
Types of Altitude Data Records
A save session stores three types of altitude records in memory: periodic
records (up to 40), a current session record, and a historical record.
Periodic Records
A save session creates up to 40 altitude records at fixed intervals and stores
them in memory. You can use the Data Recall Mode to view these records.
How periodic records are created and saved
Note
The following operation is performed simultaneously with the operation
described under “How current session record data is updated”.
1. When you hold down
C
to start a save session, the watch creates
Periodic Record 1, which contains the current date (month and day), time,
and altitude.
•
Starting a new save session clears any periodic records currently in
memory and starts a new set of periodic records.
2. Next, the watch takes readings for Periodic Record 2 up to Periodic Record
40 at minute 00, 15, 30, and 45 of each hour.
3. Altitude measurement and periodic record storage stop automatically after
Periodic Record 40 is stored.
•
You can also stop the save session manually by holding down
C
again.
This will create a final sequential periodic record, which contains the
current date (month and day), time, and altitude.