Operation Guide 3259
E-24
4. After all of the settings are the way you want, press
E
to exit the setting screen.
• T
E
again.
Note
• For i
Ho
• Whi P (P
no
timP (PM) indicator.
• The wa
year
watch’s rech
• The d
• Refe
- Button operation tone on/off: “To turn the button operation tone on and off” (page E-92)
- Illumination duration setting: “To change the illumination duration” (page E-88)
- Enabling and disabling power saving: “To turn Power Saving on and off” (page E-93).
- Changing the temperature, barometric pressure, and altitude units (for a city code other than
TYO
):
“To specify temperature, barometric pressure, and altitude units” (page E-61)
E-25
Taking Direction Readings
In the Digital Compass Mode, a built-in bearing sensor detects magnetic north at regular intervals and
indicates one of 16 directions on the display.
To take a digital compass reading
1. Make sure the watch is in the Timekeeping Mode or any one of the
sensor modes.
• The s
The
2. Place the watch on a fl
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
C
to start digital compass measurement.
• COMP will app
ope
• Se
about what appears on
Note
• If th
disp
disp
E
to exit t
screen.
5. After you are fi
D
to return to the Timekeeping Mode.
NW
0
W
NW
W
WSW
SW
SSW
S
SSE
SE
ESE
E
ENE
NE
NNE
N
NNW
90
180
270
12 o’clock position
Current time
North pointer
Direction
indicator
Angle value (in degrees)
NW
0
W
NW
W
WSW
SW
SSW
S
SSE
SE
ESE
E
ENE
NE
NNE
N
NNW
90
180
270
12 o’clock position
Current time
North pointer
Direction
indicator
Angle value (in degrees)
E-26
Digital Compass Readings
• When you press
C
to start digital compass measurement,
COMP
will initially appear on the display to
indicate that a digital compass operation is in progress.
• About two seconds after you start a digital compass measurement operation, letters on the display will
indicate the direction that the 12 o’clock position of the watch is pointing. Four pointers that indicate
magnetic north, south, east, and west will also appear.
• After the fi
each second for up to 20 seconds. After that, measurement will stop automatically.
• The direction indicator and angle value will show
- - -
to indicate that digital compass readings are
complete.
• The auto light switch is disabled during the 20 seconds that digital compass readings are being taken.
• 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-
northeast
NE
Northeast
ENE
East-
northeast
E
East
ESE
East-
southeast
SE
Southeast
SSE
South-
southeast
S
South
SSW
South-
southwest
SW
Southwest
WSW
West-
southwest
W
West
WNW
West-
northwest
NW
Northwest
NNW
North-
northwest
• The margin of error for the angle value and the direction indicator is ±11 degrees while the watch is
horizontal (in relation to the horizon). If the indicated direction is northwest (
NW
) and 315 degrees, for
example, the actual direction can be anywhere from 304 to 326 degrees.
E-27
• Note that taking a measurement while the watch is not horizontal (in relation to the horizon) can result in
large measurement error.
•
You can calibrate the bearing sensor if you suspect the direction reading is incorrect.
• Any ongoing direction measurement operation is paused temporarily while the watch is performing an
alert operation (daily alarm, Hourly Time Signal, countdown timer alarm) or while illumination is turned
on (by pressing
L
). The measurement operation resumes for its remaining duration after the operation
that caused it to pause is fi
• See “Digital Compass Precautions” (page E-37) for important information about taking direction readings.
Calibrating the Bearing Sensor
You should calibrate the bearing sensor whenever you feel that the direction readings being produced by
the watch are off. You can use any one of three different bearing sensor calibration methods: bidirectional
calibration, northerly calibration, or magnetic declination correction.
•
Bidirectional Calibration and Northerly Calibration
Bidirectional calibration and northerly calibration calibrate the accuracy of the bearing sensor in relation
to magnetic north. Use bidirectional calibration when you want to take readings within an area exposed
to magnetic force. This type of calibration should be used if the watch becomes magnetized for any
reason. With northerly calibration, you “teach” the watch which way is north (which you have to determine
with another compass or some other means).
Important!
The more correctly you perform bidirectional calibration, the better the accuracy of the bearing sensor
readouts. You should perform bidirectional calibration whenever you change environments where you
use the bearing sensor, and whenever you feel that the bearing sensor is producing incorrect readings.
E-28
•
Magnetic Declination Correction
With magnetic declination correction, you input a magnetic declination angle (difference between
magnetic north and true north), which allows the watch to indicate true north. You can perform this
procedure when the magnetic declination angle is indicated on the map you are using. Note that you can
input the declination angle in whole degree units only, so you may need to round off the value specifi
on the map. If your map indicates the declination angle as 7.4°, you should input 7°. In the case of 7.6°
input 8°, for 7.5° you can input 7° or 8°.
Precautions about bidirectional calibration
• You can use any two opposing directions for bidirectional calibration. You must, however, make sure
that they are 180 degrees opposite each other. Remember that if you perform the procedure
incorrectly, you will get wrong bearing sensor readings.
• Do not move the watch while calibration of either direction is in progress.
• You should perform bidirectional calibration in an environment that is the same as that where you plan
to be taking direction readings. If you plan to take direction readings in an open fi
calibrate in an open fi
To perform bidirectional calibration
1. In the Digital Compass Mode, hold down
E
until
SET Hold
appears
on the display and then the magnetic declination settings start to fl
2. Press
D
to display the bidirectional calibration screen.
• At thi
and t-1- to i
calibrate
E-29
3. Place the watch on a level surface facing any direction you want, and press
C
to calibrate the fi
direction.
• - - - is sh
the displayOK and -2- , and the n
mea
4. Rotate the watch 180 degrees.
5. Press
C
again to calibrate the second direction.
• - - - is sh
the displayOK and th
To perform northerly calibration
Important!
If you want to perform both northerly and bidirectional calibration, perform bidirectional calibration fi
and then perform northerly calibration. This is necessary because bidirectional calibration cancels any
existing northerly calibration setting.
1. In the Digital Compass Mode, hold down
E
until
SET Hold
appears
on the display and then the magnetic declination settings start to fl
2. Press
D
twice to display the northerly calibration screen.
• At thi-n- (
3. Place the watch on a level surface, and position it so that its 12 o’clock
position points north (as measured with another compass).
4. Press
C
to start the calibration operation.
• - - - is sh
WhOK and th
cha
E-30
To perform magnetic declination correction
1. In the Digital Compass Mode, hold down
E
until
SET Hold
appears on
the display and then the magnetic declination settings start to fl
2. Use
A
(East) and
C
(West) to change the settings.
•
Th
settings.
OFF
: No magnetic declination correction performed. The magnetic
declination angle with this setting is 0°.
E
: When magnetic north is to the east (east declination)
W
: When magnetic north is to the west (west declination)
• Y
the
• YOFF ) magn
A
and
C
at the s
• The i
and t
magn
3. When the setting is the way you want, press
E
to exit the setting
screen.
Magnetic declination angle
direction value (E, W, or OFF)
Magnetic declination
angle value
Magnetic declination angle
direction value (E, W, or OFF)
Magnetic declination
angle value
E-31
Using Bearing Memory
Bearing Memory lets you temporarily store and display a direction reading
so you can use it as a reference as you take subsequent digital compass
readings. The Bearing Memory screen displays the direction angle for the
stored reading, along with an indicator that indicates the stored reading.
When you take digital compass readings while the Bearing Memory
screen is displayed, the direction angle of the current digital compass
reading (as read from the 12 o’clock position of the watch) and the stored
Bearing Memory direction reading will both be shown.
To store a direction angle reading in Bearing Memory
1. Press
C
to start a digital compass measurement operation (page E-25).
• Thi
sec
• If a bea
mea
this happens, press
E
to cle
exit the
2. During the 20 seconds that digital compass readings are being taken, press
E
to store the current
reading in Bearing Memory.
• The B
Me
angl
• You can pres
C
at any ti
20
that t
disa
12 o’clock position
North pointer
Direction
angle of
current
reading
Bearing Memory
Screen
Bearing memory
direction angle value
Bearing
memory
pointer
12 o’clock position
North pointer
Direction
angle of
current
reading
Bearing Memory
Screen
Bearing memory
direction angle value
Bearing
memory
pointer
