Casio 3451 Operation Manual page 3

Operation Guide 3451
Swapping your Home City and Local Time City
You can use the procedure below to swap your Home City and Local Time City. This
capability can come in handy when you travel frequently between two cities in different
time zones.
To swap your Home City and Local Time City
1. In the Timekeeping Mode, select the Local Time City you want.
• For information about selecting a Local Time City, see "To specify the Local Time
City" (page E-18).
2. Hold down B for at least four seconds.
• This will make the Local Time City (which you selected in step 1) your Home City.
At the same time, it will change the Home City you had selected prior to step 2 to
your Local Time City.
Using the Watch when Travelling Between Time Zones
You can use the procedures below for smooth switching between time zones as
required.
E-20
Before Arriving at Your Destination
Swap your place of departure (Home City) and Local Time City.
Current time at place of departure
• For information about selecting a Local Time City, see "To specify the Local Time
City" (page E-18).
E-22
To enter and exit the Digital Compass/Thermometer Mode
1. While in the Timekeeping Mode, press D to enter the
During readings
Digital Compass/Thermometer Mode.
12 o'clock
• The watch will start to take direction and temperature
readings. After about two seconds, the angle that the
12 o'clock position of the compass dial is facing and
the current temperature reading will appear on the
display.
• Direction readings will be taken each second for
about 10 seconds, and then stop automatically.
• Temperature readings will be taken every two
Home time
About two
seconds for about 10 seconds, and then stop
seconds
automatically.
• To perform direction and temperature readings for
another 10 seconds, press D again.
E-24
Digital Compass
The watch takes digital compass readings automatically whenever you enter the
Digital Compass/Thermometer Mode. In addition, you can take readings manually by
performing the procedure below.
• See "Magnetic North and True North" (page E-39) for information about the two types of
north. For information about maximizing digital compass accuracy, see "Calibrating
the Bearing Sensor" (page E-33) and "Digital Compass Precautions" (page E-39).
E-26
• While the watch is taking compass readings, it
displays a direction angle and a direction indicator,
both of which change dynamically when the watch is
moved. After the compass operation is complete, the
direction pointer disappears from the display, and
the direction angle and direction indicator both show
"- - -". Use the direction indicators marked around
the compass dial to record the indicated direction.
For details, see "Example: Determining your current
position and your objective on a map" (page E-31).
• The CAL appearing on the display after a direction
reading is complete indicates that bearing sensor
calibration is required due to either of the reasons
described below. When this happens, perform the
procedure under "Calibrating the Bearing Sensor"
(page E-33).
• It's been 100 days since the last bearing sensor
calibration.
• The watch's battery was replaced.
E-28
Current time at destination
Before Setting Out
Set your destination city as the Local Time City.
Current time at place
of departure
• For information about selecting a Local Time City, see "To specify the Local Time
City" (page E-18).
Digital Compass/Thermometer
You can take direction readings and temperature readings in the Digital Compass/
Thermometer Mode. Direction readings are taken by the watch's built-in magnetic
bearing sensor and displayed as one of 16 directions. A temperature sensor is used
for temperature readings.
• See "Digital Compass" on page E-26 for more information about the digital compass.
• See "Thermometer" on page E-41 for more information about the thermometer.
2. Press C to return to the Timekeeping Mode.
• For information about using the digital compass, see "To take a direction
reading" on page E-27.
• For information about using the thermometer, see "To take a temperature
reading" on page E-42.
To take a direction reading
1. While the watch is in the Digital Compass/Thermometer
North pointer
Mode, place it on a flat surface, or if you are wearing
12 o'clock
the watch, make sure that your wrist is horizontal (in
relation to the horizon).
2. Point the 12 o'clock position of the compass dial in the
direction you want to measure.
3. Press D to start a Digital Compass measurement
operation.
• After about two seconds, the direction that the 12
Angle value Direction
(in degrees) indicator o'clock position of the compass dial is pointing
appears on the display.
NW
0°
270°
• The compass dial's pointer indicates magnetic north.
• After the first reading is obtained, the watch
continues to take direction readings automatically
each second, for up to 10 seconds.
• To perform direction readings for another 10
seconds, press D again.
180° 90°
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 and the direction indicator is ±15 degrees. If
the indicated direction is northwest (NW) and 315 degrees, for example, the actual
direction can be anywhere from 300 to 330 degrees.
• 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.
• The following table shows the meanings of each of the direction abbreviations that
appear on the display.
Current time at destination
E-21
E-23
E-25
E-27
E-29