E-40
Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as
magnetic north or true north, which are different from each
other. Also, it is important to keep in mind that magnetic
north moves over time.
•
Magnetic north is the north that is indicated by the
needle of a compass.
•
True north, which is the location of the North Pole of the
Earth’s axis, is the north that is normally indicated on
maps.
•
The difference between magnetic north and true north
is called the “declination”. The closer you get to the
North Pole, the greater the declination angle.
True north
Earth
Magnetic north
True north
Earth
Magnetic north
E-41
Location
•
Taking a direction reading when you are near a source of strong magnetism can
cause large errors in readings. Because of this, you should avoid taking direction
readings while in the vicinity of the following types of objects: permanent magnets
(magnetic necklaces, etc.), concentrations of metal (metal doors, lockers, etc.),
high tension wires, aerial wires, household appliances (TVs, personal computers,
washing machines, freezers, etc.).
•
Accurate direction readings are impossible while in a train, boat, air plane, etc.
•
Accurate readings are also impossible indoors, especially inside ferroconcrete
structures. This is because the metal framework of such structures picks up
magnetism from appliances, etc.
E-42
Storage
•
The precision of the bearing sensor may deteriorate if the watch becomes
magnetized. Because of this, you should store the watch away from magnets or any
other sources of strong magnetism, including: permanent magnets (magnetic
necklaces, etc.) and household appliances (TVs, personal computers, washing
machines, freezers, etc.).
•
Whenever you suspect that the watch may have become magnetized, perform the
procedure under “To perform bidirectional calibration” (page E-36).
E-43
Thermometer
This watch uses a temperature sensor to take temperature readings.
To enter and exit the Thermometer Mode
1. In the Timekeeping Mode or Digital Compass Mode,
press
D
.
•
THERMO
will appear on the digital display for about
one second indicating that temperature readings
are being taken. After that, the measurement result
will appear.
•
The watch will take temperature readings every fi ve
seconds for one or two minutes.
•
To restart temperature readings, press
D
.
2. Press
C
to return to the Timekeeping Mode.
•
If you do not perform any button operation for one
or two minutes after temperature measurement is
complete, the watch will automatically return to the
Timekeeping Mode.
Temperature
Temperature
E-44
Temperature
•
Temperature is displayed in units of 0.1°C (or 0.2°F).
•
The displayed temperature value changes to
--.-
°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 reappear as soon as the measured temperature is within the
allowable range.
Display Units
You can select either Celsius (°C) or Fahrenheit (°F) for the displayed temperature
value. See “To specify temperature unit” (page E-47) for more information.
Temperature Sensor Calibration
The watch’s temperature sensor is calibrated at the factory and normally requires no
further adjustment. If you notice serious errors in the temperature readings produced
by the watch, you can calibrate the sensor to correct the errors.
E-45
Important!
•
Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
– Compare the readings produced by the watch with those of another reliable and
accurate thermometer.
– If adjustment is required, remove the watch from your wrist and wait for 20 or 30
minutes to give the temperature of the watch time to stabilize.
To correct the temperature value
You can correct the temperature readings displayed by
the watch in accordance with another measuring
instrument for more accurate readings.
1. In the Thermometer Mode, hold down
A
until the
current temperature value fl ashes on the digital display.
This is the setting screen.
E-46
2. Use
D
(+) and
B
(–) to calibrate the temperature value with the reading of another
instrument.
•
Each press of a button changes the temperature value in units of 0.1°C (0.2°F).
•
To return the currently fl ashing value to its initial factory default setting, press
B
and
D
at the same time.
OFF
will appear at the fl ashing location for about
one second, followed by the initial default value.
3. Press
A
to return to the Thermometer Mode.
Thermometer Precautions
•
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 all moisture from the case. It
takes approximately 20 to 30 minutes for the case of the watch to reach the actual
surrounding temperature.
•
When taking temperature readings, it is best to remove the watch from your wrist in
order to eliminate the effects of body heat. Remove the watch from your wrist and
allow it to hang freely from your bag or in another location where it is not exposed
to direct sunlight.
E-47
Specifying Temperature Unit
Use the procedure below to specify the temperature unit to be used in the
Thermometer Mode.
Important!
When
TOKYO
is selected as the Home City, the
temperature unit is set automatically to Celsius (
°C
).
These settings cannot be changed.
To specify the temperature unit
1. Enter the Thermometer Mode and then hold down
A
for
about two seconds until the current temperature value
fl ashes on the digital display. This is the setting screen.
2. Press
C
to display the temperature unit setting screen
with either
°C
or
°F
(the current setting) fl ashing.
E-48
3. Press
D
to toggle the temperature unit between
°C
(Celsius) and
°F
(Fahrenheit).
4. After the setting is the way you want, press
A
to exit the setting screen.
E-49
Looking up Sunrise and Sunset Times
You can use the Sunrise/Sunset Mode to look up the sunrise and sunset times for a
particular date (year, month, day) and location.
To look up the sunrise and sunset times on a specifi c date
Use
C
to select the Sunrise/Sunset Mode as shown on
page E-13.
•
SUNRISE TIME
or
SUNSET TIME
will appear on the
digital display for about one second. After that the
current year, month, and day will appear for about one
second.
•
Next,
CALC
will appear to indicate that calculation is in
progress. After the calculation is complete, the sunrise
time or sunset time for the current date will appear.
•
What appears fi rst when the enter the Sunrise/Sunset
Mode (either the sunrise time or sunset time) will be the
time that was displayed when you last exited the
Sunrise/Sunset Mode.
Sunrise time or
sunset time
(or
)
Sunrise time or
sunset time
(or
)
Operation Guide 5269
