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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

Barometric pressure graph

Mode.

(unit: 1hPa (mb)/0.05inHg)

• 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

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

Temperature

soon as the measured barometric pressure

Barometric pressure

is within the allowable range.

• The displayed temperature value changes to

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".

xxxx

hPa/mb (or inHg) if a

°C (or °F) if a

Not visible on

the display.

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.

Countdown Timer Mode

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

Countdown start time

Mode, hold down A until the time setting

setting indicator

starts to flash, which indicates the setting

screen.

• This causes the

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

Timekeeping

3. Press D to display the reset time setting

Mode time

screen.

• The indicator in the upper display area

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.

2273-3

Stopwatch Mode

indicator to

appear on the display.

the range of 1'00" to 60'00".

changes from

indicate the reset time setting screen.