Operation Guide 2872

• The 12-hour/24-hour timekeeping format you select in the Timekeeping

Mode is applied in all modes.

• The year can be set in the range of 2000 to 2039. The day of the week is

calculated automatically in accordance with the date you set.

• The watch’s built-in full automatic calendar makes allowances for different

month lengths and leap years. Once you set the date, there should be no

Barometer/Thermometer

This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature sensor to measure temperature.

•You can calibrate the temperature sensor and the pressure sensor if you suspect that readings are incorrect.

To take barometric pressure and temperature readings

reason to change it except when battery power drops to Level 4.

Digital Compass

A built-in bearing sensor detects magnetic north and indicates one of 16 directions on the display. Direction readings are performed in the Digital Compass Mode.

•You can calibrate the bearing sensor if you suspect the direction reading is incorrect.

To enter and exit the Digital Compass Mode

12 o’clock position

1. While in the Timekeeping or in any of the other

Temperature

Barometric Barometric

pressure pressure indicators

Pressing E in the the Timekeeping or in any of other sensor modes enters the Barometer/ Thermometer Mode and automatically starts taking barometric pressure and temperature measurements.

•It can take up to four or five seconds for the barometric pressure reading to appear after you enter the Barometer/Thermometer Mode.

•Barometric pressure is displayed in units of 1hPa (or 0.05 inHg).

 

 

 

 

 

 

 

 

 

sensor modes, press B to enter the Digital

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compass Mode.

 

 

 

 

 

 

l ll

 

• At this time, the watch immediately starts a

 

 

 

 

 

 

 

Digital Compass operation. After about two

 

 

 

 

 

 

l

l

 

 

 

 

 

 

l

l

 

 

 

 

 

 

l

 

l

seconds, letters appear on the display to

 

 

 

 

 

 

l

 

 

 

 

 

 

 

lll

 

 

 

 

 

 

 

 

 

 

indicate the direction that the 12 o’clock

Timekeeping

 

 

position of the watch is pointing.

 

 

2. Press C to return to the Timekeeping Mode.

Mode time

 

 

 

To take a direction reading

• The displayed barometric pressure value changes to xxxx hPa (or inHg) if

 

a measured barometric pressure falls outside the range of 260 hPa to 1100

 

hPa (7.65 inHg to 32.45 inHg). The barometric pressure value will be

 

displayed again as soon as the measured barometric pressure is within the

 

allowable range.

•

Temperature is displayed in units of 0.1°C (or 0.2°F).

•

The displayed temperature value changes to xxx °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.

• In some areas, barometric pressure is expressed in millibars (mb) instead

 

of hecto-pascals (hPa). It really makes no difference, because 1hPa = 1mb.

Magnetic north pointer

12 o’clock position

Direction indicator

l

l ll

 

 

l

l

 

l

l

 

l

l

 

 

 

 

ll

l

 

 

 

 

Angle value (in degrees)

270°

NW NW NN

W

0°

W

 

 

 

W

 

 

 

 

N

 

SW

 

 

 

 

E

 

 

 

 

 

 

N

W

 

 

 

 

 

N

 

 

 

 

 

 

SW

 

 

 

 

 

NE

SSW

 

 

 

 

ENE

 

S

 

 

 

 

E

180°

ES

S

ESE

90°

 

 

 

SE

 

 

1.Enter the Digital Compass Mode.

2.Place the watch on a flat surface or, if you are wearing the watch, make sure that your wrist is horizontal (in relation to the horizon).

3.Point the 12 o’clock position of the watch in the direction you want to measure.

4.Press B to start a Digital Compass

measurement operation.

•After about two seconds, the direction that the 12 o’clock position of the watch is pointing appears on the display.

•Also, four pointers appear to indicate magnetic north, south, east, and west.

•After the first reading is obtained, the watch continues to take direction readings automatically each second, for up to 20 seconds.

•

You can select either hectopascals (hPa) or inchesHg (inHg) as the display

 

unit for the measured barometric pressure, and Celsius (°C) or Fahrenheit

 

(°F) as the display unit for the measured temperature value. See “To

 

change the barometric pressure and temperature units”.

•

See “Barometer and Thermometer Precautions” for important precautions.

Barometric Pressure Indicators

The watch’s barometric pressure indicators graphically show you whether the barometric pressure for up to the last 15 hours has been rising, holding steady, or falling. Since changes in barometric pressure signal changes in the atmosphere, you can predict upcoming weather with reasonable accuracy by looking at the current tendency of barometric pressure.

The barometric pressure indicator display area of the watch has three lines: top, middle, and bottom. The location of each indicator tells you whether barometric pressure is rising, steady, or falling.

Rise greater than 3hPa from previous reading

Within ±2hPa of previous reading

•During measurement, the watch displays an angle value, a direction indicator, and four direction pointers, which change dynamically when the watch is moved. After measurement is complete, the angle value, direction indicator, and four direction pointers are frozen in accordance with the last measurement.

•The indicator flashes on the display while a measurement is in progress.

Note

•Note that taking a measurement while the watch is not horizontal

(in relation to the horizon) can result in large measurement error.

•The margin of error for the angle value is ±11 degrees. If the indicated direction is northwest (NW) and 315 degrees, for example, the actual direction can be anywhere from 304 to 326 degrees.

•Any ongoing direction measurement operation is temporarily paused while the watch is performing an alert operation (daily alarm, Hourly Time Signal, countdown timer alarm) or while the watch’s backlight is turned on (by pressing L). The measurement operation resumes for its remaining duration after the operation that caused it to pause is finished.

•The following table shows the meanings of each of the direction abbreviations that appear on the display.

Direction

Meaning

Direction

Meaning

Direction

Meaning

Direction

Meaning

N

North

NNE

North-

NE

Northeast

ENE

East-

northeast

northeast

 

 

 

 

 

 

E

East

ESE

East-

SE

Southeast

SSE

South-

southeast

southeast

 

 

 

 

 

 

S

South

SSW

South-

SW

Southwest

WSW

West-

southwest

southwest

W

West

WNW

West-

NW

Northwest

NNW

North-

northwest

northwest

•See “Digital Compass Precautions” for other important imformation about taking direction readings.

Fall greater than 3hPa from previous reading

How to Interpret Barometric Pressure Indicators

•The rightmost indicator is the newest indicator, the leftmost indicator is the oldest indicator.

Rising pressure generally means improving weather.

Falling pressure generally means deteriorating weather.

•The locations of the indicators, not their pattern, indicates barometric pressure tendencies.

•A series of multiple indicators in the top line of the barometric pressure indicator display area indicates a series of rising pressure readings. It does not indicate steady pressure at a high level.

•A series of multiple indicators in the bottom line of the barometric pressure

indicator display area indicates a series of falling pressure readings. It does not indicate steady pressure at a low level.

• A movement of indicators from the top line to the middle line does not indicate falling pressure, and a movement of indicators from the bottom line to

the middle line does not indicate rising pressure. A move to the middle line indicates that the current

pressure measurement is relatively unchanged (within ±2hPa) from the previous measurement. Rising pressure is not indicated until an indicator

appears in the top line, and falling pressure is not indicated until an indicator appears in the bottom line.

•Steady pressure is indicated by a series of indicators in the middle line.

Notes

•Though you can configure the watch to display barometric pressure in units of hPa or inHg, the barometric pressure indicator positions are always determined based on ±3 hPa changes in barometric pressure.

•No indicator is plotted if a measurement operation cannot be performed due to sensor malfunction, low battery power, because of the watch is in the function sleep state, or any other reason.

2