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Barometric Pressure Monitor Function
The Barometric Pressure Monitor Function automatically takes barometric readings
every three hours (starting from midnight). The measured values are shown on a
barometric pressure graph that shows changes in pressure at a glance.
• The barometric pressure graph is shown on the display in any mode.
Reading the barometric pressure graph
Barometric pressure graph
Example: When the current time is 10:58 PM.
6:00 - 9:00 - 12:00 - 3:00 P.M. - 6:00 P.M. - 9:00 P.M.
down
[Timekeeping Mode]
• The barometric pressure graph shows data for the past 15 hours.
• The flashing point on the right of the display is the point for the last measurement.
• The graph shows upward or downward movement
whenever the current measurement is at least ap-
proximately 2 hPa(mb) (or 0.05 inHg) greater or
less than the previous reading.
• Extreme barometric pressure changes can cause
the graph to shift upwards or downwards, causing
parts of the graph to no longer be visible. The en-
tire graph will become visible once barometric con-
ditions stabilize.
Using the barometric pressure graph
A rising graph generally means better weather.
A falling graph generally means deteriorating weather.
The following conditions cause the barometric pressure measurement to be skipped,
with the corresponding point on the barometric pressure graph being left blank.
• Barometric reading that is out of range (600 to 1,100 hPa(mb) /17.70 to 32.45 inHg).
• Sensor malfunction
• Dead battery
Barometer Mode
In addition to readings taken for the barometric pressure
graph, there is also a Barometer Mode that you can use
Barometric pressure
for measuring barometric pressure. When you enter the
Barometer Mode, measurements are taken every 4 sec-
Mode indicator
onds for the first four minutes. After that, measurements
are taken every minute. The display unit for Barometer
Mode measurements is 1 hPa(mb) (or 0.05 inHg), and
the display range is 600 to 1,100 hPa(mb) /17.70 to 32.45
inHg.
• The display shows " – – – – " if a measured value falls
outside the range of 600 to 1,100 hPa(mb) /17.70 to
32.45 inHg. The normal display will return as soon as
the pressure returns within the allowable range.
Current time
• If you do not press any button for 5 or 6 hours in the
[Barometer Mode Display]
Barometer Mode, the display returns to the Timekeep-
ing Mode automatically.
Measurement formats and ranges
Display range: 600 to 1,100 hPa(mb) /17.70 to 32.45 inHg
Display unit: 1 hPa(mb) (or 0.05 inHg)
Measuring range: 600 to 1,100 hPa(mb) /17.70 to 32.45 inHg
Barometric pressure change display
When you start measurement (step 2 in the procedure below), the first barometric
pressure measurement is used as a base. Then, each subsequent measurement is
compared with the base, and the difference is shown on the display. Measurements
are taken every 2 seconds for the first four minutes. After that, measurements are
taken every minute.
To use the barometric pressure change display
1. Use C C C C C to enter the Barometer Mode.
Pressure change
2. Press D D D D D to change to the barometric pressure change
Mode indicator
display. At this time, the watch also starts to measure
the elapsed time.
• You can press B B B B B at any time to stop the elapsed time
measurement (though timing continues internally). To
resume timing (from the time being kept internally), press
B B B B B again.
• You can press D D D D D to change to the normal Barometer
Mode display (showing the current time). Though the
display changes, elapsed time measurement continues
internally. To return to the pressure change display,
Elapsed time
press D D D D D again.
(Minutes, Seconds,
3. Press A A A A A to stop the measurement and switch to the
1/10 second)
normal Barometer Mode display.
• Whenever the elapsed time passes the 60-minute mark, the display changes auto-
matically from showing minutes, seconds and 1/10 second, to hours, minutes, sec-
onds.
• You can perform barometric change measurement for up to 23 hours, 59 minutes,
59 seconds. Whenever the elapsed time passes the 24-hour mark, measurement is
stopped automatically and the normal Barometer Mode display appears.
Calibrating the barometric pressure measurement
The sensor of this watch is calibrated at the factory before shipment and further
adjustment is normally not required. If noticeable error is found in the barometric
pressure readings produced by the watch, you can adjust it to correct the error.
Important
• Incorrectly adjusting the barometric pressure measurement of this watch can result
in incorrect readings. Compare the readings produced by the watch with those of
another reliable, accurate barometer.
• Though you should not try to perform calibration while the barometric pressure
change display is shown, you can perform calibration while the barometric pressure
change operation is being performed internally, without affecting the operation.
up
up
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To calibrate the barometer
1. Enter the Barometer Mode and confirm that the normal
Barometer Mode display (showing the current time) is
shown.
2. Hold down A A A A A for about two seconds. In about 6 sec-
onds, the barometric pressure value should start flash-
ing on the display.
3. Each press of D D D D D increases the displayed barometric
pressure by 1 hPa(mb), while pressing B B B B B decreases it.
Holding down either button changes the value at high
speed.
• If you have selected inHg as your unit of measurement,
the above operations change the reading by 0.05 inHg.
• Barometric pressure can be calibrated within the range of 600 hPa(mb) to 1,100
hPa(mb) (or 17.70 inHg to 32.45 inHg).
• Pressing B B B B B and D D D D D at the same time resets the watch to its factory calibration.
4. After calibrating the barometer, press A A A A A to return to the normal Barometer Mode
display.
• If you do not operate any button for a few minutes while the barometric pressure
digits are flashing, the flashing stops and the watch returns to the normal Barome-
ter Mode display.
ALTIMETER FUNCTIONS
A built-in altimeter uses a pressure sensor to detect the current air pressure, which is
then used to estimate the current altitude in accordance with ISA (International Stan-
dard Atmosphere) values for altitude and barometric pressure. The readout from the
pressure sensor can be switched between meters (m) and feet (ft.).
Important!
• This watch estimates altitude based on barometric pressure. This means that alti-
tude readings for the same location may vary if barometric pressure changes.
• Sudden changes in the weather make it impossible to produce accurate altitude
readings.
• Do not use this watch while participating in sports where there are sudden altitude
changes. Also, do not use this watch for applications that demand professional or
industrial level precision. This watch should not be used while engaging in the fol-
lowing activities: sky diving, hang gliding, paragliding, gyrocopter riding, glider riding,
etc.
• In order to avoid measurement problems caused by differences in the watch's tem-
perature, be sure to wear the watch so that it comes into direct contact with your
skin.
Example altimeter applications
• Measurement of altitudes during hiking or mountain climbing.
• Calculation of average ascending and descending speeds while driving in the moun-
tains.
• Measurement of the height of a building.
Switching between meters and feet
1. Use C C C C C to enter the Altimeter Mode.
Mode indicator
2. Hold down A A A A A for about two seconds. In about 6 sec-
onds, the altitude value should start flashing on the dis-
play.
3. Press C C C C C to select either meters (m) and (ft.).
4. After you select " m " or " ft. ", press A A A A A to return to the
Altimeter Mode.
Altimeter Mode
The Altimeter Mode automatically measures your current altitude. When you enter
the Altimeter Mode, measurements are taken every three seconds for the first five
minutes.
After that, measurements are taken every minute.
Measurement formats and ranges
Display range: –4,000 to 4,000 m (or –13,120 to 13,120 ft.)
Display unit: 5 m (or 20 ft.)
Measuring range: 4,000 m (or 13,120 ft.), within the rage of –4,000 to 4,000 m
(or –13,120 to 13,120 ft.).
Reading the altimeter display
Use C C C C C to enter the Altimeter Mode.
Current altitude
• If you do not press any button for 5 or 6 hours in the
Mode indicator
Altimeter Mode, the display returns to the Timekeeping
Mode automatically.
• The display shows " – – – – " if a measured value falls
outside the measuring range. The normal display will
return as soon as the pressure returns within the allow-
able range.
Current time
High altitude memory
The high altitude memory automatically stores the high-
est measured altitude into memory. To display the cur-
rently stored high altitude, enter the Altimeter Mode and
press B B B B B . To return to the normal Altimeter Mode display,
press B B B B B again. To clear the current high altitude value
from memory, display the value and then hold down D D D D D
until the watch beeps. As soon as you clear the memory,
the next measurement of an altitude is automatically stored
as the new high altitude.
Maximum altitude
[ High Altitude Display ]
2147-2
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