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Operation Guide 3172
Radio-controlled Atomic Timekeeping Precautions
• Strong electrostatic charge can result in the wrong time setting.
• Even if a receive operation is successful, certain conditions can cause the time setting to be off by up
to one second.
• The watch is designed to update the date and day of the week automatically for the period January 1,
2000 to December 31, 2099. Updating of the date by signal reception will no longer be performed
starting from January 1, 2100.
• If you are in an area where signal reception is not possible, the watch keeps time with the precision
noted in “Specifi cations”.
• The receive operation is disabled under any of the following conditions.
– While power is at Level 3 (
L
) or lower
– While the watch is in the power recovery mode
– While a sensor operation is being performed
– When the watch is in the function sleep state (“Power Saving”)
– While a countdown timer operation is in progress
• A receive operation is cancelled if an alarm sounds while it is being performed.
• The Home City setting reverts to the initial default of
TYO
(Tokyo) whenever the battery power level
drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the
Home City to the setting you want.
Mode Reference Guide
Your watch has 11 “modes”. The mode you should select depends on what you want to do.
To do this: Enter this mode:
• View the current date in the Home City
• Confi gure Home City and daylight saving time (DST) settings
• Confi gure time and date settings manually
Timekeeping Mode
View the sunrise and sunset times for a specifi c date Sunrise/Sunset Mode
• Determine your current bearing or the direction from your current
location to a destination as a direction indicator and angle value
• Determine your current location using the watch and a map
Digital Compass Mode
• View the barometric pressure and temperature at your current location
• View a graph of barometric pressure readings
Barometer/Thermometer Mode
• View the altitude at your current location
• Determine the altitude differential between two locations (reference
point and current location)
• Record an altitude reading with the measurement time and date
Altimeter Mode
Recall records created in the Altimeter Mode Data Recall Mode
View the current time in one of 48 cities (31 time zones) around the globe World Time Mode
Use the stopwatch to measure elapsed time Stopwatch Mode
Use the countdown timer Countdown Timer Mode
Set an alarm time Alarm Mode
• Perform a time calibration receive operation
• Check whether the last receive operation was successful
Receive Mode
Selecting a Mode
• The illustration below shows which buttons you need to press to navigate between modes.
• For about one second after you enter a mode by pressing
D
, a pointer will appear on the display
pointing the applicable mode name on the watch's bezel.
• In any mode, press
L
to illuminate the display.
World Time
Mode
Data Recall
Mode
Sunrise/Sunset
Mode
Stopwatch Mode
Countdown
Timer Mode
Alarm Mode Receive Mode
Altimeter Mode
Barometer/
Thermometer Mode
Digital Compass Mode
Timekeeping Mode
Sensor Modes
World Time
Mode
Data Recall
Mode
Sunrise/Sunset
Mode
Stopwatch Mode
Countdown
Timer Mode
Alarm Mode Receive Mode
Altimeter Mode
Barometer/
Thermometer Mode
Digital Compass Mode
Timekeeping Mode
Sensor Modes
• You can use buttons
A
,
B
, and
C
to enter a sensor mode directly from the Timekeeping Mode or
from another sensor mode. To enter a sensor mode from the Sunrise/Sunset Mode, Data Recall, World
Time, Stopwatch, Countdown Timer, Alarm, or Receive Mode, fi rst enter the Timekeeping Mode and
then press the applicable button.
General Functions (All Modes)
The functions and operations described in this section can be used in all of the modes.
Auto Return Features
• The watch returns to the Timekeeping Mode automatically if you do not perform any button operation
for two or three minutes in the Sunrise/Sunset, Data Recall, Alarm, Receive, or Digital Compass Mode.
• If you leave a screen with fl ashing digits on the display for two or three minutes without performing any
operation, the watch exits the setting screen automatically.
Initial Screens
When you enter the World Time, Alarm, or Digital Compass Mode, the data you were viewing when you
last exited the mode appears fi rst.
Scrolling
The
A
and
C
buttons are used on the setting screen to scroll through data on the display. In most
cases, holding down these buttons during a scroll operation scrolls through the data at high speed.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
• Pressing
E
while in the Timekeeping Mode will cycle through the Timekeeping Mode display formats
as shown below.
Year
Barometric
pressure graph
Day of the Week Screen Year Screen Barometric Pressure
Graph Screen
PM
indicator
Day of
week
Month
Day
SecondsHour : Minutes
Confi guring Home City Settings
There are two Home City settings: actually selecting the Home City and selecting either standard time or
daylight saving time (DST).
To confi gure Home City settings
1. In the Timekeeping Mode, hold down
E
until the currently selected
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message SET Hold
will appear on the display. Keep
E
depressed until SET Hold
disappears and the city code starts to fl ash.
• The watch will exit the setting mode automatically if you do not
perform any operation for about two or three minutes.
• For details about city codes, see the “City Code Table”.
2. Press
A
(East) and
C
(West) to select the city code you want to use
as your Home City.
• Keep pressing
A
or
C
until the city code you want to select as
your Home City appears on the display.
3. Press
D
to display the DST setting screen.
4.
Use
A
to cycle through the DST settings in the sequence shown below.
Auto DST (AUTO) DST off (OFF)
DST on (
On
)
• The Auto DST (AUTO) setting will be available only when a city code that supports time calibration
signal reception is selected as the Home City. While Auto DST is selected the DST setting will be
changed automatically in accordance with time calibration signal data.
• Note that you cannot switch between standard time and daylight saving time (DST) while UTC is
selected as your Home City.
5. After all the settings are the way you want, press
E
twice to return to the Timekeeping Mode.
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
Note
• After you specify a city code, the watch will use UTC* offsets in the World Time Mode to calculate
the current time for other time zones based on the current time in your Home City.
* Coordinated Universal Time, the world-wide scientifi c standard of timekeeping.
The reference point for UTC is Greenwich, England.
• Selecting some city codes automatically makes it possible for the watch to receive the time
calibration signal for the corresponding area. See “Radio Controlled Atomic Timekeeping” for
details.
PM
indicator
City
code
Month
Day
SecondsHour : Minutes
DST indicator
PM
indicator
City
code
Month
Day
SecondsHour : Minutes
DST indicator