Casio GW3500B-1A Operation Manual
MA1002-EA
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Operation Guide 5121
Congratulations upon your selection of this CASIO watch.
This watch does not have a city code that corresponds to the UTC offset of –3.5
hours. Because of this, the radio-controlled atomic timekeeping function will not
display the correct time for Newfoundland, Canada.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any
damage or loss suffered by you or any third party arising through the use of this
product or its malfunction.
About This Manual
B +
@
* 6> 5
n Right Dial Hands: Indicate a time, in 24-hour format, depending on the current
m Day
This User’s Guide uses numbers shown above to identify watch hands and indicators.
Button operations are indicated using the letters A
through D shown in the illustration.
Hand Functions
z Hour Hand
x Second Hand
c Minute Hand
v Left Dial Hand:
Indicates the current day of the week and current
mode.
b 24-hour Hand:
Indicates the current 24-hour timekeeping hour.
mode.
Things to check before using the watch
1. Hold down C at least two seconds to enter the Timekeeping Mode, and
then observe the movement of the
Is the x Second Hand moving smoothly at one-second intervals?
Is the x Second Hand moving at
two-second intervals or is it stopped
completely?
Power is low. Charge the watch by placing it
in a location where it is exposed to light. For
details, see “Charging the Watch”.
NO
YES
Second Hand.
The watch is charged suffi ciently.
For details about charging, see
“Charging the Watch”.
Go to step 2.
YES
NEXT
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To confi gure Home City settings” to confi gure your Home
City and daylight saving time settings.
Important!
Proper time calibration signal reception and World Time settings depend on correct
Home City, time, and date settings in the Timekeeping Mode. Make sure you
confi gure these settings correctly.
3. Set the current time.
• To set the time using a time calibration signal
See “To get ready for a receive operation”.
• To set the time manually
See “Confi guring Current Time and Date Settings Manually”.
The watch is now ready for use.
For details about the watch’s radio contr olled timekeeping feature, see “Radio •
Controlled Atomic Timekeeping”.
Charging the Watch
The face of the watch is a solar cell that generates power from light. The generated
power charges a built-in rechargeable battery, which powers watch operations. The
watch charges whenever it is exposed to light.
Charging Guide
Warning!
Leaving the watch in bright light for charging 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 •
Important!
Keep the watch in an area normally exposed to bright light when storing it for long •
periods. This helps to ensure that power does not run down.
Storing the watch for long periods in an area where there is no light or wearing it in •
such a way that it is blocked from exposure to light can cause power to run down.
Make sure that the watch is exposed to bright light whenever possible.
Whenever you are not
wearing the watch, leave
it in a location where it is
exposed to light.
Best charging •
performance is achieved
by exposing the watch to
light that is as strong as
possible.
When wearing the watch,
make sure that its face is
not blocked from light by the
sleeve of your clothing.
The watch may enter a •
sleep state if its face is
blocked by your sleeve
even only partially.
Power Levels
B +
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Moves at two-second
intervals.
Level Hand Movement Function Status
1 Normal. All functions enabled
Second Hand moves at two-second
2
intervals.
Day changes to 1 (home position).
Second Hand stopped.
3
z Hour Hand and c Minute Hand
stopped at 12 o’clock.
When power drops to Level 3, all functions will be disabled but the watch will •
continue to keep time internally for about one week. If you recharge the battery
suffi ciently during this period, the analog hands will move automatically to the
correct setting and regular timekeeping will resume. After one week, all settings
(including timekeeping) will be cleared. Recharging the battery will reset all settings
to their initial factory defaults.
Power Recovery Mode
The watch is designed to go into a power recovery mode that stops hand operation
temporarily whenever power suddenly drops below a certain level due to overuse
of the alarm tone over a short period. Note that all operations are disabled while the
watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal
operation after power recovers (in about 15 minutes). Putting the watch in a location
where it is exposed to light will help power to recover sooner.
You can get an idea of the watch’s power level by
observing the movement of the
Timekeeping Mode.
If the •
Second Hand is moving normally at one-second
intervals, power is at Level 1.
If the •
Second Hand is moving at two-second intervals,
power is at Level 2, which is quite low. Expose the watch
to light as soon as possible so it can charge.
5
Beeper, time calibration signal
reception disabled
All functions disabled
Second Hand in the
Charging Times
Exposure Level (Brightness)
Outdoor sunlight (50,000 lux) 8 minutes 2 hours 24 hours
Window sunlight (10,000 lux) 30 minutes 6 hours 90 hours
Window sunlight on cloudy day
(5,000 lux)
Indoor fl uorescent lighting (500 lux) 8 hours 92 hours – – –
1 Approximate exposure each day to generate power for normal daily operation. *
2 Approximate exposure to take power up one level. *
The above times are for reference only. Actual times depend on lighting conditions. •
For details about the operating time and daily operating conditions, see the “Power •
Supply” section of the Specifi cations.
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 actually are two sleep state levels: “second hand sleep” and “function sleep”. •
Elapsed Time in Dark Operation
60 to 70 minutes (second hand sleep)
6 or 7 days (function sleep)
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch •
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep
state.
The watch will not enter a sleep state while it is in the Stopwatch Mode. •
To recover from the sleep state
Move the watch to a well-lit area or press any button.
Daily
Operation
*1
48 minutes 8 hours – – –
Second Hand only stopped at 12 o’clock, all
other functions enabled
All functions, including analog timekeeping, •
disabled
Internal timekeeping maintained •
Level Change *2
Level 3 Level 2 Level 1
Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly.
However, when using the watch outside of areas covered by time calibration signals,
you will have to adjust the settings manually as required. See “Confi guring Current
Time and Date Settings Manually” for more information.
This section explains how the watch updates its time settings when the city code
selected as the Home City is in Japan, North America, Europe, or China, and is one
that supports time calibration signal reception.
If your Home City code setting is this:
LON, PAR, ATH Anthorn (England), Mainfl ingen (Germany)
HKG Shangqiu City (China)
TYO Fukushima (Japan), Fukuoka/Saga (Japan)
HNL, ANC, LAX, DEN, CHI, NYC Fort Collins, Colorado (United States)
Important!
The areas covered by • HNL and ANC are quite far from the calibration signal
transmitters, so certain conditions may cause reception problems.
When • HNL or HKG is selected as the Home City, only the time and date are
adjusted according to the time calibration signal. You need to switch manually
between standard time and daylight saving time (DST) if required. See “To toggle
the Home City time between standard time and daylight saving time” for information
about how to do this.
The watch can receive the signal from the
transmitter located here:
1
Operation Guide 5121
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Approximate Reception Ranges
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Inside a
vehicle
Mainfl ingen
Fukushima
1,000 kilometers
12 o’clock
or
Near
household
appliances,
offi ce
equipment,
or a mobile
phone
Signal reception normally is better •
at night.
The receive operation takes from two •
to seven minutes, but in some cases
it can take as long as 14 minutes.
Take care that you do not perform
any button operation or move the
watch during this time.
Near a
construction
site, airport,
or other
sources of
electrical
noise
The Anthorn signal is receivable
within this area.
Japanese Signals Chinese Signal
500 kilometers
Fukuoka/Saga
Even when the watch is within range of a transmitter, signal reception may be •
impossible due to the effects of geographic contours, structures, weather, the time
of year, the time of day, radio interference, etc. The signal becomes weaker at
distances of approximately 500 kilometers, which means that the infl uence of the
above conditions becomes even greater.
Signal reception may not be possible at the distances noted below during certain •
times of the year or day. Radio interference may also cause problems with
reception.
Mainfl ingen (Germany) or Anthorn (England) transmitters: 500 kilometers −
(310 miles)
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers) −
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles) −
Shangqiu (China) transmitter: 500 kilometers (310 miles) −
As of November 2009, China does not use Daylight Saving Time (DST). If China •
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.
Using this watch in a country covered by a time calibration signal that is different •
from the countries it supports may result in incorrect time indication due to local
application of summer time, etc.
To get ready for a receive operation
Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down 1. C at least
two seconds to enter the Timekeeping Mode.
The antenna of this watch is located on its 12 o’clock side. Position the watch with 2.
12 o’clock facing towards a window as shown in the nearby illustration. Make sure
there are no metal objects nearby.
Signal reception may be diffi cult or even impossible under the conditions •
described below.
Inside or
among
buildings
What you should do next depends on whether you are using Auto Receive or 3.
Manual Receive.
Auto Receive: Leave the watch over night in the location you selected in step 2. •
See “Auto Receive” for details.
Manual Receive: Perform the operation under “To perform manual receive”. •
Auto Receive
With Auto Receive, the watch performs the receive operation each day automatically •
up to six times (up to fi ve times for the Chinese calibration signal) between the
hours of midnight and 5 a.m. (according to the Timekeeping Mode time). When any
receive operation is successful, none of the other receive operations for that day
are performed.
When a calibration time is reached, the watch will perform the receive operation only •
if it is in the Timekeeping Mode or World Time Mode. The receive operation is not
performed if a calibration time is reached while you are confi guring settings.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Changchun500 kilometers
1,500 kilometers
Near
high-tension
power lines
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
Among
or behind
mountains
To perform manual receive
In the Timekeeping Mode, keep 1. A depressed (for about two seconds) as the
Second Hand goes through the following sequence.
Moves to • YES (or Y for some models) or NO (N) to indicate the last signal
reception result, then to READY (R).
The 2. x Second Hand indicates the operations the watch is currently performing.
When the x Second
Hand is pointed here:
READY (R) Watch is setting up for reception.
WORK (W) Reception is in progress.
YES (Y)
NO (N) Reception failed for some reason.
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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 2 or lower −
While the watch is in the power recovery mode −
When the watch is in the function sleep state (“Power Saving”) −
A receive operation is cancelled if an alarm sounds while it is being performed. •
If signal reception is unstable, the •
move betweenWORK (W) and READY (R).
The receive operation is complete when the 3.
Hand moves to YES (Y) or NO (N) for about fi ve
seconds, and then resumes regular timekeeping.
You can return to the Timekeeping Mode manually by •
pressing A while the
YES (Y) or NO (N).
When the receive operation is successful, the watch •
adjusts the time setting accordingly. It does not adjust
the setting if the operation failed.
Note
To interrupt a receive operation and return to the •
Timekeeping Mode, press any button.
To check the result of the latest receive operation
In the Timekeeping Mode, press A.
Second Hand will move to YES (Y) for fi ve
The •
seconds if the latest receive operation was successful,
or NO (N) if it was not. After that, regular timekeeping
will resume.
You can return to the Timekeeping Mode manually by •
pressing A while the
(Y) or NO (N).
Note
Second Hand will indicate NO (N) if you have
The •
adjusted the time or date setting manually since the latest
receive operation.
It means this:
Reception was completed
successfully.
Second Hand may
Second
Second Hand is pointing to
Second Hand is pointing to YES
Mode Reference Guide
Your watch has four “modes”. The mode you should select depends on what you
want to do.
To do this: Enter this mode:
View the current time in your Home City and in one of 29 other cities •
around the globe
View the current date in the Home City •
Confi gure Home City and daylight saving time (DST) settings •
Perform a time calibration receive operation •
Confi gure time and date settings manually •
Use the stopwatch to measure elapsed time Stopwatch Mode
Select one of 29 cities (time zones) around the world and view the •
current time there
Select daylight saving/summer time (DST) or standard time for a •
time zone
Set an alarm time Alarm Mode
Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.
To determine the watch’s current mode
Check the position of the
under “To select a mode”.
To return to the Timekeeping Mode from any other
mode
Except while the watch is performing auto hand home
position correction, hold down C at least two seconds until
>
the x Second Hand returns to 12 o’clock.
Left Dial Hand as shown
Timekeeping Mode
World Time Mode
2
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