Casio 2931 Operation Manual page 5

Time Required for Reception
Signal reception normally takes anywhere from about two to five
minutes.
• Under certain conditions, signal reception can take as long as 12
minutes.
• For information about turning auto receive on and off, see
"To turn auto receive on and off".
❚ To turn auto receive on and off
• Auto receive can be turned on only while OSA (Osaka), TYO
(Tokyo), LAX (Log Angeles), DEN (Denver), CHI (Chicago), or
NYC (New York) is selected as the Home City.
1.
In the Timekeeping Mode,
press the D D D D D button to
display the last reception
time and date.
• The watch also will return to
the Timekeeping Mode
automatically if you do not
perform any operation for
about two or three minutes.
2.
Hold down the A A button A A A
for about two seconds
until the current On/OFF
setting starts to flash. This
is the setting screen.
Operation Guide 2931
❚ To perform manual receive
In the Timekeeping Mode, hold
D D
down the D D D button for about
two seconds.
• The watch will beep and reception
will start. The receive indicator
flashes on the display while signal
reception is in progress.
❚ To interrupt reception
Press the D D button. D D D
• All other buttons besides D are disabled during signal reception.
When reception is successful
The watch terminates reception and adjusts the current time. Next
it beeps and then displays the date and time the adjustment was
performed.
• Following reception, the receive indicator will show a value from 1
to 3 as described under "Receive Indicator". The receive indicator
is cleared each day at midnight.
• After the date and time of the adjustment appears on the display,
press the D button to return to the Timekeeping Mode. If watch
will also return to the Timekeeping Mode automatically if you do
not perform any operation for about two or three minutes.
When reception fails
In the case of an error, the watch will not adjust its current time
setting, but display "ERR" instead.
• If the "ERR" indicator is displayed, you can clear it manually by
pressing the D button. The error will also clear automatically if
you do not perform any operation for about two or three minutes.
3.
Press the D D D D D button to
toggle the setting between
On and OFF.
4.
When the setting is the
way you want, press the
A A button. A A A
• This will exit the setting
screen and return to the last
reception time and date
screen.
• Press the D button to return
to the Timekeeping Mode.
• The display also will exit the
setting screen automatically if
you do not perform any
operation for about two or
three minutes.
Receive Indicator
Receive Indicator
The receive indicator cycles from
"Unstable" through "Stable" as
shown below while reception is in
progress. How far it cycles depends
on the signal strength.
Keep the watch in a location where
reception is stable while reception is
in progress.
Unstable
Stable
• Even under optimum reception conditions, it can take about 10
seconds for reception to stabilize.
• Use the receive indicator to check reception status and to
determine the best location for signal reception.
• Note that weather, the time of day, surroundings, and other
factors can all affect reception.
When the Home City is TYO or OSA
• On
Selecting this setting turns on auto receive and auto
transmitter selection. The watch automatically selects either
the Otakadoya Mountain signal (40kHz) or the Hagane
Mountain signal (60kHz), whichever is strongest.
• OFF
Selecting this setting turns off auto receive and auto
transmitter selection.
When the Home City is NYC, CHI, DEN, or LAX
• On
Selecting this setting turns on auto receive. The watch always
receives the Fort Collins signal.
• OFF
Selecting this setting turns off auto receive and auto
transmitter selection.
❚ To view the last reception date and time
In the Timekeeping Mode, press the D D button. D D D
• This displays the date and time when signal reception was last
successful, and the current time and date were last adjusted.
• If there have been no successful receptions, the last reception
time will show "- -:- -".
• To return to the Timekeeping Mode, press the D button again.
• The watch also will return to the Timekeeping Mode automatically
if you do not perform any operation for about two or three
minutes.
Reception Date
Reception Time
Calibration Signal Reception
Precautions
• Auto receive can be performed while the watch is in the
Timekeeping Mode or World Time Mode only.
• Signal reception is not possible when any one of the following
conditions exists.
• Timer operation in progress
• Battery at Level 3 or Level 4
• Recover indicator (RECOV) displayed
• Operating any button while auto receive is in progress will cause
the watch to beep and then exit the receive operation.
• Make sure you are within the range of the calibration signal
transmitter before performing the reception operation. Remember
that geographic contours, nearby buildings, the season, the time
of day, can even make reception impossible even when you are
within range of the transmitter.
• Proper reception may be impossible if there is something blocking
the signal. If reception is unsuccessful, try again.
• This watch is designed to adjust its current time setting in
accordance with the calibration signal transmitted in Japan and
the United States only. Note that you will need to make your own
adjustments when using this watch outside of Japan or the United
States, or in any area that is outside the range of one of the
receivable time calibration signal transmitters.
• When the watch is unable to adjust its time signal using the
calibration signal for some reason, timekeeping accuracy is within
±
15 seconds per month.
• Strong electrostatic charge can cause timekeeping error.
• Signal reception is cancelled if an alert operation is starts while it
is being performed.
• The watch's calendar shows dates up to the year 2099.
Attempting a receive operation after that causes an error.
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