Using The Chronograph; Calibration Signal Reception Precautions; Troubleshooting - Casio 4343 Operation Manual

Location
Reception is difficult and may even be impossible in the locations
described below. Avoid such locations when performing signal
reception.
• You should think of your watch as operating like a radio or TV
when it is receiving the calibration signal.
Among or near buildings Near high-voltage lines
Inside a vehicle Next to a household
(automobile, train, plane, etc.) appliance or office
equipment (TV, speaker, fax,
computer, cell phone, etc.)
In a location where there is
radio interference
Near mountains
(construction site, airport, etc.)
If you are experiencing problems with reception, move away
from the types of locations described above to a location with
better reception, and try again.

Using the Chronograph

The chronograph performs 1/20-second elapsed time measurement
up to 23 hours, 59 minutes, 59.95 seconds (24 hours). When the
maximum limit is reached, the elapsed time returns to zero
automatically and timing continues from there.
• In the Timekeeping Mode, press the B B B B button once to enter B
the Chronograph Mode.
Timekeeping Mode Chronograph Mode
Indicator hand makes
one revolution.
Second hand Second hand
counts seconds. moves to "0".
• To return to the Timekeeping Mode, press the A
A A A A button while
the chronograph is reset to zero.
Operation Guide 4343
Calibration Signal Reception
Precautions
• Auto receive is disabled while the watch is in the Chronograph
Mode.
• 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 a calibration signal
transmitter before performing the receive operation. Remember
that geographic contours, nearby buildings, the season, or the
time of day can 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 using the calibration
signal for some reason, timekeeping accuracy is within ±20
seconds per month.
• Strong electrostatic charge can cause timekeeping error.
• Receive is cancelled if an alarm operation 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.
To start or stop an elapsed time
operation
Enter the Chronograph Mode to use the chronograph.
Second
• Start
• Reset
• Stop
Hour, Minute
1/20 second
Start Stop
• 1/20-second timing is performed for the first minute after you start
or restart an elapsed time measurement operation. The 1/20-
second hand also jumps to the elapsed time position when you
stop an elapsed time measurement operation.
• Pressing the A button while an elapsed time measurement
operation is in progress resets the chronograph to zero.
Cumulative Time Measurement
Pressing the B button to restart the chronograph without resetting it
to all zeros resumes elapsed time measurement from where it was
last stopped.

Troubleshooting

1. The watch cannot receive the time calibration signal.
• Is there something in the immediate area that may be interfering
with reception?
Even if you are within the reception range of a transmitter, objects
between you and the transmitter or electrical noise can interfere
with reception. Avoid such areas during signal reception. See
"Location" for more information.
• Are you within the reception range of a transmitter?
See "Reception Ranges" for information about areas where the
watch can receive the signal.
• Do you have the correct Home City code selected?
Remember that auto receive is not performed unless TYO
(Tokyo), HKG (Hong Kong), NYC (New York), CHI (Chicago),
DEN (Denver), LAX (Los Angeles), ANC (Anchorage), or HNL
(Honolulu) is selected as the Home City. Select the correct Home
City code using the procedure under "Changing the Home City
Setting".
• Is the signal being transmitted?
Though the time data of the Japanese calibration signal (Call
Sign: JJY) is maintained by the Japan Standard Time Group of
the National Institute of Information and Communications
Technology (NICT), it sometimes may be interrupted for periodic
maintenance work, or because of lightning or other problems.
Reset
2. Time calibration signal reception is successful, but the
hourly time signal and current time are slightly off.
• After the watch receives the time calibration signal, it performs an
internal decoding process before updating its time setting.
Because of this, the time setting may be off slightly (within one
second).
3. Time calibration signal reception is successful, but the
current time setting is wrong.
• Is the correct city code selected for your Home City? Select the
correct Home City code using the procedure under "Changing the
Home City Setting".
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