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Operation Guide 2872
2
• 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
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
1. While in the Timekeeping or in any of the other
sensor modes, press B to enter the Digital
Compass Mode.
• At this time, the watch immediately starts a
Digital Compass operation. After about two
seconds, letters appear on the display to
indicate the direction that the 12 o’clock
position of the watch is pointing.
2. Press C to return to the Timekeeping Mode.
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Timekeeping
Mode time
12 o’clock position
To take a direction reading
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.
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Direction
indicator
Angle value (in degrees)
Magnetic north pointer
12 o’clock position
NW
0°
W
NW
W
W
SW
SW
SSW
S
S
S
E
SE
ESE
E
ENE
NE
N
N
E
N
N
N
W
90°
180°
270°
• 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.
• See “Digital Compass Precautions” for other important imformation about
taking direction readings.
Direction
Meaning
Direction
Meaning
Direction
Meaning
Direction
Meaning
NNE
ESE
SSW
WNW
NE
SE
SW
NW
North-
northeast
East-
southeast
South-
southwest
West-
northwest
Northeast
Southeast
Southwest
Northwest
East-
northeast
South-
southeast
West-
southwest
North-
northwest
ENE
SSE
WSW
NNW
North
East
South
West
N
E
S
W
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
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).
Barometric
pressure
indicators
Temperature
Barometric
pressure
• 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.
• 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.
Within
±
2hPa of previous reading
Rise greater than 3hPa from previous
reading
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.