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2273-3
Not visible on
the display.
Barometric pressure graph
(unit: 1hPa (mb)/0.05inHg)
Temperature
Barometric pressure
BAROMETER/THERMOMETER
This watch uses a pressure sensor to measure air pressure (barometric
pressure) and a temperature sensor to measure a temperature.
• You can calibrate the temperature sensor and the pressure sensor if you
suspect that readings are incorrect.
Understanding the Barometer/Thermometer Screen
Press C to enter the Barometer/Thermometer
Mode.
• Barometric pressure is displayed in units of
1hPa/mb (or 0.05inHg).
• Temperature is displayed in units of 0.1°C
(or 0.2°F).
• The displayed barometric pressure value
changes to
xxxx hPa/mb (or inHg) if a
measured barometric pressure falls outside
the range of 260hPa/mb to 1100hPa/mb
(7.65inHg to 32.45inHg). The barometric
pressure value will be displayed again as
soon as the measured barometric pressure
is within the allowable range.
• The displayed temperature value changes to
xx. x °C (or °F) if a
measured temperature falls outside the range of –10.0°C to 60.0°C (14.0°F
to 140.0°F). The temperature value will be displayed again as soon as the
measured temperature is within the allowable range.
• Some countries refer to the barometric pressure unit hecto-pascal (hPa) as
millibars (mb). It really makes no difference, because 1hPa = 1mb. In this
manual, we use hPa/mb or hPa (mb).
Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere. By monitoring
these changes you can predict the weather with reasonable accuracy. The
barometric pressure graph shows the barometric readings for the past 26
hours. The flashing point on the right of the display is the point for the newest
measurement. Note that pressure graph readings are relative to the newest
measurement point. One dot above the newest point is plus 1hPa(mb)/
0.05inHg, while one dot below is minus 1hPa(mb)/0.05inHg. The following
shows how to interpret the data that appears on the barometric pressure
graph.
A rising graph generally means improving weather.
A falling graph generally means deteriorating weather.
Note that if there are sudden changes in weather or
temperature, the graph line of past measurements may run
off the top or bottom of the display. The entire graph will
become visible once barometric conditions stabilize.
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 (260hPa/mb to 1100hPa/mb or
7.65inHg to 32.45inHg)
• Sensor malfunction
• Dead batteries
About Barometric and Temperature Measurements
• Barometric pressure and temperature measurement operations are
performed as soon as you enter the Barometer/Thermometer Mode. After
that, temperature measurements are taken every five seconds for the first
three minutes, and then taken every five minutes thereafter.
• The BARO indicator flashes on the display while a measurement is in
progress.
• The barometer automatically takes measurements every two hours
(starting from midnight), regardless of what mode you are in. The results of
these measurements are used for the barometric pressure graph.
• You can also perform a barometric pressure and temperature
measurement at any time by pressing C in the Barometer/Thermometer
Mode.
Barometer and Thermometer Precautions
• The pressure sensor built into this watch measures changes in air
pressure, which you can then apply to your own weather predictions. It is
not intended for use as a precision instrument in official weather prediction
or reporting applications.
• Sudden temperature changes can affect pressure sensor readings.
• Temperature measurements are affected by your body temperature (while
you are wearing the watch), direct sunlight, and moisture. To achieve a
more accurate temperature measurement, remove the watch from your
wrist, place it in a well ventilated location out of direct sunlight, and wipe off
all moisture from the case. It takes approximately 20 to 30 minutes for the
case of the watch to reach the actual surrounding temperature.
• You can change the measured barometric pressure unit between hecto-
pascals/millibars (hPa/mb) and inchesHg (inHg). See “Changing the
Barometric Pressure and Temperature Units” for details.
• You can change the measured temperature value displayed by this watch
between Celsius (°C) and Fahrenheit (°F). See “Changing the Barometric
Pressure and Temperature Units”.
COUNTDOWN TIMER
With the countdown timer, you can set a start time in the range of 1 to 60
minutes, and countdown the time to zero. A beeper sounds each second of
the final 10 seconds of a countdown, and you can also turn on a progress
beeper that beeps at various times during a countdown. All of this makes the
countdown timer a valuable tool for timing the start of a yacht race.
• The countdown timer also can be used as a stopwatch to measure elapsed
time, split time, and two finishes. See “STOPWATCH” for more
information.
• All the operations in this section are performed in the Countdown Timer/
Stopwatch Mode, which you can enter by pressing D.
Configuring the Countdown Timer
You need to make the settings listed below before actually using the
Countdown Timer for timing.
• Countdown start time and reset time
• Auto repeat/repeat, progress beeper on/off
• Graphic on/off
Reset time
You can set a “reset time,” which is a kind of alternate countdown start time
you can recall with the press of a button any time a countdown operation is in
progress. After recalling the reset time, you can press E to restart the
countdown operation from the recalled reset time.
Auto Repeat and Repeat
The countdown timer gives you a choice of two different repeat modes: auto
repeat and repeat.
Auto Repeat
When auto repeat is turned on, the countdown automatically restarts from the
countdown start time whenever it reaches zero.
Note
• Even if you start a countdown operation from the reset time, the countdown
automatically restarts from the countdown start time whenever it reaches zero.
• Auto repeat timing repeats 100 times or until you press E to stop the
countdown.
• Auto repeat timing is best when timing the starts of match races.
Repeat Timing
When repeat timing is turned on, the watch automatically switches to the
Stopwatch Mode and starts stopwatch timing when the end of the countdown
is reached.
Note
Repeat timing is best when timing the speed of yachts during ocean races.
To set the countdown start time and reset time
1. While in the Countdown Timer/Stopwatch
Mode, hold down A until the time setting
starts to flash, which indicates the setting
screen.
• This causes the
indicator to
appear on the display.
2. While the countdown start time setting is
flashing, use E (+) and B (–) to change
it in one-minute increments.
• You must set a countdown start time in
the range of 1'00" to 60'00".
3. Press D to display the reset time setting
screen.
• The indicator in the upper display area
changes from
to to
indicate the reset time setting screen.
4. While the reset time is flashing, use E (+) and B (–) to change it in one-
minute increments.
• You can set a reset time in the range of 1'00" to 5'00".
5. After making the setting you want, press A to exit the setting screen.
Important!
The reset time setting must be less than the countdown start time setting.
▲
Countdown Timer Mode
Stopwatch Mode
Timekeeping
Mode time
Countdown start time
setting indicator