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Casio GW3500B-1A-5121 Manual

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Operation Guide 5121
Approximate Reception Ranges
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainfl ingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Japanese Signals Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
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.
12 o’clock
or
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.
Signal reception may be diffi cult or even impossible under the conditions •
described below.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
offi ce
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near
high-tension
power lines
Among
or behind
mountains
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.
To perform manual receive
In the Timekeeping Mode, keep 1. A depressed (for about two seconds) as the
x
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:
It means this:
READY (R) Watch is setting up for reception.
WORK (W) Reception is in progress.
YES (Y)
Reception was completed
successfully.
NO (N) Reception failed for some reason.
If signal reception is unstable, the •
x
Second Hand may
move between WORK (W) and READY (R).
The receive operation is complete when the 3.
x
Second
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
x
Second Hand is pointing to
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.
The •
x
Second Hand will move to YES (Y) for fi ve
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
x
Second Hand is pointing to YES
(Y) or NO (N).
Note
The •
x
Second Hand will indicate NO (N) if you have
adjusted the time or date setting manually since the latest
receive operation.
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. •
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 •
Timekeeping Mode
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
World Time Mode
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
v
Left Dial Hand as shown
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.
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