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Operation Guide 3260 3280
E-50
To take a digital compass reading
1. Place the watch on a flat surface. If you are wearing
the watch, make sure that your wrist is horizontal (in
relation to the horizon).
2. Point the 12 o’clock position of the watch in the
direction you want to check.
3. Press
C
to enter the Digital Compass/Thermometer
Mode and take a digital compass reading.
• COMP will appear on the display to indicate that a
digital compass operation is in progress.
• See “Digital Compass Readings” on page E-51 for
information about what appears on the display.
Note
• If a value appears to the right of the direction
indicator, it means that the bearing memory (page
E-61) screen is displayed. If this happens, press
A
to exit the bearing memory screen.
NW
0
W
N
W
W
WSW
SW
SSW
S
S
S
E
SE
ESE
E
E
N
E
NE
NNE
N
NN
W
90
180
270
12 o’clock
position
North
pointer
Temperature
Direction
indicator
Angle value (in degrees)
NW
0
W
N
W
W
WSW
SW
SSW
S
S
S
E
SE
ESE
E
E
N
E
NE
NNE
N
NN
W
90
180
270
12 o’clock
position
North
pointer
Temperature
Direction
indicator
Angle value (in degrees)
E-51
4. After you are finished using the digital compass, press
D
to return to the mode you
entered the Digital Compass/Thermometer Mode from.
Digital Compass Readings
• When you press
C
to start digital compass measurement,
COMP
will appear on
the display initially 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 also will
appear.
• After the first reading is obtained, the watch will continue to take digital compass
readings automatically 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.
E-52
• 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-53
• 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
B
). The measurement
operation resumes for its remaining duration after the operation that caused it to
pause is finished.
• See “Digital Compass Precautions” (page E-70) 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. There are three different calibration methods
available: magnetic declination correction, bidirectional calibration, and northerly
calibration.
E-54
•
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 specified 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°.
•
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).
E-55
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-56
To perform magnetic declination correction
1. In the Digital Compass/Thermometer Mode, hold down
A
until the current magnetic declination settings start
to flash on the display. This is the setting screen.
2. Use
E
(East) and
B
(West) to change the settings.
• The following explains magnetic declination angle
direction 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)
• You can select a value within the range of W 90° to
E 90° with these settings.
• You can turn off (OFF) magnetic declination
correction by pressing
E
and
B
at the same time.
Magnetic declination
angle direction value
(E, W, or OFF)
Magnetic declination
angle value
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Magnetic declination
angle direction value
(E, W, or OFF)
Magnetic declination
angle value
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E-57
• The illustration, for example, shows the value you should input and the direction
setting you should select when the map shows a magnetic declination of 1°
West.
3. When the setting is the way you want, press
A
to exit the setting screen and take
direction and temperature readings.
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 field, for example, calibrate in an open field.
E-58
To perform bidirectional calibration
1. In the Digital Compass/Thermometer Mode, hold down
A
until the current magnetic declination settings start
to flash on the display. This is the setting screen.
2. Press
D
to display the bidirectional calibration screen.
• At this time, the north pointer flashes at the 12 o’clock
position and the display will show -1- to indicate that
the watch is ready to calibrate the first direction.
3. Place the watch on a level surface facing any direction
you want, and press
C
to calibrate the first direction.
• - - - is shown on the display while calibration is
being performed. When calibration is successful,
the display will show OK and -2-, and the north
pointer flashing at the 6 o’clock position. This means
that the watch is ready for calibration of the second
direction.
4. Rotate the watch 180 degrees.
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E-59
5. Press
C
again to calibrate the second direction.
• - - - is shown on the display while calibration is being performed. When
calibration is successful, the display will show OK and then take direction and
temperature readings.
To perform northerly calibration
Important!
If you want to perform both northerly and bidirectional calibration, perform
bidirectional calibration first, and then perform northerly calibration. This is necessary
because bidirectional calibration cancels any existing northerly calibration setting.
1. In the Digital Compass/Thermometer Mode, hold down
A
until the current magnetic declination settings start
to flash on the display. This is the setting screen.
2. Press
D
twice to display the northerly calibration
screen.
• At this time, -N- (north) appears on the display.
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