Operation Guide 3723 3724
4
•
At Level 3, all functions are disabled and settings return to their initial factory
defaults. The analog hands will move to the current time and normal timekeeping will
resume when the battery is recharged sufficiently.
•
Illumination or alarm operation can cause hand movement to stop due to the sudden
temporary drop in battery power. This does not indicate malfunction, and normal
operation will resume when the watch is exposed to light. Though hand movement
stops, timekeeping continues internally, and the hands will be adjusted to the correct
setting when normal operation returns.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
•
On the dashboard of a car parked in direct sunlight
•
Too close to an incandescent lamp
•
Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about four months.
•
The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
•
Since these are the specs, we can include all the technical details.
•
Watch is not exposed to light
•
Internal timekeeping
•
Display on 18 hours per day, sleep state 6 hours per day
•
1 light operation (1.5 seconds) per day
•
10 seconds of alarm operation per day
•
1 time calibration reception per day
•
Stable operation is promoted by frequent charging.
Exposure Level (Brightness)
Outdoor sunlight (50,000 lux)
Sunlight through a window (10,000 lux)
Daylight through a window on a cloudy day (5,000
lux)
Indoor fluorescent lighting (500 lux)
Approximate Exposure Time
6 minutes
30 minutes
48 minutes
8 hours
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
12 hours
61 hours
– – –
– – –
Outdoor sunlight (50,000 lux)
Sunlight through a window
(10,000 lux)
Daylight through a window on
a cloudy day (5,000 lux)
Indoor fluorescent lighting
(500 lux)
Approximate Exposure Time
Level 3
Level 2
Level 1
1 hour
2 hours
3 hours
30 hours
Exposure Level
(Brightness)
•
The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
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Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Features
•
If you leave the watch in the Alarm Mode or Home Position Adjustment Mode for two
or three minutes without performing any operation, it returns to the Timekeeping
Mode automatically.
•
If you do not perform any operation for about two or three minutes while a setting
mode is selected, the watch will exit the setting mode automatically.
Scrolling
•
The
B
button is used to change the hand setting in various setting modes. In most
cases, holding down the
B
button will start high-speed movement of the applicable
hand(s).
•
High-speed movement of the hands will continue until it completes a 12-hour cycle,
or until you press any button to stop it.
Radio-controlled Timekeeping Precautions
•
Strong electrostatic charge can result in the wrong time being set.
•
Even when the watch is within the reception range of the transmitter, signal
reception will be impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
•
Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
•
The time calibration signal bounces 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.
•
Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
•
The current time setting in accordance with the time calibration signal takes priority
over any time settings you make manually.
•
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 the time
calibration signal cannot be performed starting from January 1, 2100.
•
This watch can receive signals that differentiate between leap years and non-leap
years.
•
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.
•
If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.
•
If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your Home Time Zone (GMT
differential) setting.
The following are the initial factory defaults for this setting.
Module 3723: GMT +1.0
Module 3724: GMT +0.0
•
To find out the module number of your watch, look at its
back cover. The Module number (3723 or 3724) is
engraved inside the box on the back cover.
Transmitters
This watch is able to receive time calibration signals transmitted in Germany
(Mainflingen) and England (Rugby). The following explains how the watch determines
which transmitter it should check first.
3723
Module 3723
Module 3724
In this case:
The first signal search operation after
factory default settings are in effect.
The first signal search operation after
the Home Time Zone has been
changed.
The watch does this:
1. Checks the Mainflingen signal first.
2. If the Mainflingen signal cannot be
received, checks the Rugby signal.
1. Checks the Rugby signal first.
2. If the Rugby signal cannot be received,
checks the Mainflingen signal.
In this case:
The first signal search operation after
factory default settings are in effect.
The first signal search operation after
the Home Time Zone has been
changed.
The watch does this:
1. Checks the Rugby signal first.
2. If the Rugby signal cannot be received,
checks the Mainflingen signal.
1. Checks the Rugby signal first.
2. If the Rugby signal cannot be received,
checks the Mainflingen signal.
Timekeeping
•
The year can be set in the range of 2000 to 2099.
•
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 or when battery power drops to
Level 3.
•
The date will change automatically when the current time reaches midnight. The
date change at the end of the month may take more time than normal.
•
The current time for all time zones in the Timekeeping Mode is calculated in
accordance with the Greenwich Mean Time (GMT) differential of each zone, based
on your Home Time Zone time setting.
•
GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* UTC 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. The reference point for UTC is Greenwich,
England.
Power Saving
Power Saving enters a sleep state automatically whenever the watch is left for a
certain period in an area where it is dark. The table below shows how watch functions
are affected by Power Saving.
•
There are actually two sleep state levels: “second hand sleep” and “function sleep”.
Operation
Second hand only is stopped, all other functions are
enabled.
•
All functions, including analog timekeeping, disabled
•
Internal timekeeping maintained
Elapsed Time in Dark
60 to 70 minutes
(second hand sleep)
6 or 7 days
(function sleep)
•
Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
•
The watch will not enter the sleep state between 6:00 AM and 10:59 PM. If the
watch is already in the sleep state when 6:00 AM arrives, however, it will remain in
the sleep state.
To recover from the sleep state
Perform any one of the following operations.
•
Move the watch to a well-lit area.
•
Press any button.
•
Angle the watch towards your face for reading.
Illumination Precautions
•
The illumination provided by the light may be hard to see when viewed under direct
sunlight.
•
Illumination turns off automatically whenever an alarm sounds.
•
Frequent use of illumination shortens the battery operating time.
Auto light switch precautions
•
Wearing the watch on the inside of your wrist, movement of your arm, or vibration of
your arm can cause frequent activation of the auto light switch and illuminate the
face of the watch. To avoid running down the battery, turn off the auto light switch
whenever engaging in activities that might cause frequent illumination of the face.
•
Note that wearing the watch under your sleeve while the auto light switch is turned
on can cause frequent illumination of the face and can run down the battery.
•
Illumination may not turn on if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.
•
Illumination turns off after about one second, even if you
keep the watch pointed towards your face.
•
Static electricity or magnetic force can interfere with
proper operation of the auto light switch. If illumination
does not turn on, try moving the watch back to the
starting position (parallel with the ground) and then tilt it
back towards your face again. If this does not work, drop
your arm all the way down so it hangs at your side, and
then bring it back up again.
More than 15 degrees
too high
•
Under certain conditions, illumination may not turn on until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the auto light switch.
•
You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.
