Operation Guide This guide is for printing.
Operation Guide 3476
EN-59
Battery: One lithium battery (Type: CR1620)
Approximately 3 years on type CR1620 (assuming alarm operation 10 seconds
per day, one illumination operation 3 seconds per day and one signal reception
6minutes per day)
Frequent use of illumination can shorten battery operating time.
Specifications are subject to change without notice.
EN-58
World Time: 48 cities (29 time zones); UTC offset
Other: Standard Time/Daylight Saving Time (summer time)
Timer:
Measuring unit: 1 second
Input range: 1 minute to 60 minutes (1-minute increments)
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 59' 59.99"
Measuring modes: Elapsed time, split time, two finishes
Alarm: Daily alarm; Hourly Time Signal
Illumination: LED light
Other: Auto Display function; Button operation tone on/off
EN-57
Specifications
Accuracy at normal temperature: ±15 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes, seconds, a.m.(A)/p.m.(P), month, day, day of the week
(English, Spanish, French, Portuguese, German, Italian, Chinese,
Russian, Japanese)
Time format: 12-hour and 24-hour
Calendar system: Full Auto calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Standard Time/
Daylight Saving Time (summer time); Month/Day display format
Time Calibration Signal Reception: Auto receive up to six times a day (remaining
auto receives cancelled as soon as one is successful); Manual Receive; Last
Signal screen; Standard time/summer time auto switching
Receivable Time Calibration Signals: Mainflingen, Germany (Call Sign: DCF77,
Frequency: 77.5 kHz); Anthorn, England (Call Sign: MSF, Frequency:
60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0 kHz);
Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins,
Colorado, the United States (Call Sign: WWVB, Frequency: 60.0 kHz)
EN-56
Illumination
The display of the watch is illuminated for easy reading in the dark. In any mode
(except when a setting screen is on the display), press B to illuminate the display for
about three seconds.
Illumination Precautions
x The LED that provides illumination loses power after very long use.
x Illumination may be hard to see when viewed under direct sunlight.
x Illumination turns off automatically whenever an alarm sounds or when time
calibration reception is in progress.
x Frequent use of illumination runs down the battery.
EN-55
x The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the
world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the
Earth’s rotation.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.
x With the 12-hour format, the P (PM) indicator appears on the display for times in
the range of noon to 11:59 p.m. and the A (AM) indicator appears for times in the
range of midnight to 11:59 a.m.
x With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
EN-54
x The watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery goes dead or is replaced. TYO (Tokyo) causes the watch to
receive the time calibration signals of Japan. If you are using the watch in North
America or Europe, you will need to change the Home City code setting to match
your location after having the watch’s battery replaced.
Timekeeping
x The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
x The year can be set in the range of 2000 to 2099.
x The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to
change it except after you have the watch’s battery replaced.
x The times for the Timekeeping Mode and all the city codes of the World Time Mode
are calculated in accordance with each city’s UTC offset.
x The UTC offset is a value that indicates the time difference between a reference
point in Greenwich, England and the time zone where a city is located.
EN-53
x Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to
time data only.
x Normally, the signal reception date shown by the Last Signal screen is the
date data included in the received time calibration signal. When only time data
is received, however, the Last Signal screen shows the date as kept in the
Timekeeping Mode at the time of signal reception.
x If you are in an area where proper time calibration signal reception is impossible,
the watch keeps time with the precision noted in “Specifications”.
x If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code (page EN-12),
DST (summer time) (page EN-48), and auto receive settings (page EN-27). The
following are the initial factory defaults for these settings.
Setting Initial Factory Default
City code TYO
(Tokyo)
DST (summer time) AUTO
(Auto switching)
Auto receive ON
(Auto receive)
EN-52
Radio-controlled Atomic Timekeeping Precautions
x Strong electrostatic charge can result in the wrong time being set.
x The time calibration signal is bounced off the ionosphere. Because of this, such
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
x Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
x The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
x The watch is designed to update the date and day of the week automatically for
the period January 1, 2000 to December 31, 2099. Setting of the date by a time
calibration signal cannot be performed starting from January 1, 2100.
x This watch can receive signals that differentiate between leap years and non-leap
years.
EN-51
Auto Return Features
x If you leave the watch with the Last Signal screen in the Timekeeping Mode for one
or two minutes without performing any operation, it returns to the Current Time and
Date screen in the Timekeeping Mode automatically.
x If you leave the watch in the Alarm Mode for two or three minutes without
performing any operation, it returns to the Timekeeping Mode automatically.
x If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data. In most cases, holding down these buttons during a scroll operation
scrolls through the data at high speed.
Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
EN-50
Button Operation Tone
The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.
x Even if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Timer Mode alarm all operate
normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down C to toggle the button operation tone
on (
not displayed) and off ( displayed).
x Since the C button is also the mode change button, holding it down to turn the
button operation tone on or off also causes the watch’s current mode to change.
x The mute indicator is displayed in all modes when the button operation tone is
turned off.
Mute indicator