Casio Operation Guide 4722 User Manual download pdf (Page 2)

Operation Guide 4722

• Signal reception is normally better at night than during the day.

• Time calibration signal reception takes from four to seven minutes, but in some

cases it can take as long as 14 minutes. Take care that you do not perform any

button operations or move the watch during this time.

• The time calibration signal the watch will attempt to pick up depends on its current

Home Time Zone setting as shown below. If you use the watch in Japan (which has

two different transmitter locations), it will try to receive the time calibration signal

from one of the transmitters in your current location. If it cannot receive the signal, it

will then try to receive the time calibration signal from the other transmitter.

Home Time Zones and Transmitters

Home Time Zone

–5.0 (DST –4.0)

–6.0 (DST –5.0)

–7.0 (DST –6.0)

–8.0 (DST –7.0)

–9.0 (DST –8.0)

–10.0 (DST –9.0)

+8.0 (DST +9.0)

+9.0 (DST +10.0)

Frequency

60.0 kHz

40.0 kHz

60.0 kHz

Transmitter

Fort Collins, Colorado

(the United States)

Fukushima (Japan)

Fukuoka/Saga (Japan)

Reception Ranges

Fort Collins

2,000 miles

(3,000 kilometers)

600 miles

(1,000 kilometers)

1,000

kilometers

1,000

kilometers

Fukuoka/Saga

500

kilometers

Fukushima

500

kilometers

• 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.

Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)

Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)

• 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.

• See the information under “Signal Reception Troubleshooting” if you experience

problems with time calibration signal reception.

About Auto Receive

The watch receives the time calibration signal automatically up to six times a day.

When any auto receive is successful, the remaining auto receive operations are not

performed. The reception schedule (calibration times) depends on your currently

selected Home Time Zone, and whether standard time or Daylight Saving Time is

selected for your Time Zone.

Auto Receive Start Times

123456

Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am

Standard Time and

Daylight Saving

Time

Standard Time

–5.0 (DST –4.0)

–6.0 (DST –5.0)

–7.0 (DST –6.0)

–8.0 (DST –7.0)

–9.0 (DST –8.0)

–10.0 (DST –9.0)

+8.0 (DST +9.0)

+9.0 (DST +10.0)

Your Time Zone

Note

• The auto receive operation is performed only if the watch is in the Timekeeping

Mode or Dual Time Mode when a calibration time is reached. It is not performed if a

calibration time is reached while an alarm is sounding or while you are configuring

settings.

• Auto receive of the calibration signal is designed to be performed early in the

morning, while you sleep (provided that the Timekeeping Mode time is set correctly).

Before going to bed for the night, remove the watch from your wrist, and put it in a

location where it can receive the signal easily.

• The watch receives the calibration signal for four to 14 minutes everyday when the

time in the Timekeeping Mode reaches each of the calibration times. Avoid

performing any button operation within 14 minutes before or after any one of the

calibration times. Doing so can interfere with correct calibration.

• Remember that reception of the calibration signal depends on the current time in the

Timekeeping Mode.

To perform manual receive

1. Place the watch on a stable surface so its 12 o’clock

side is facing towards a window.

2. In the Timekeeping Mode, hold down A for about two

seconds until the watch beeps.

3. The stopwatch second hand will move to R (READY) to

indicate that the watch is setting up for time calibration

reception.

• The second hand will move to W (WORK) and stay there

while actual reception is in progress.

• The hour and minute hands continue to keep time

normally.

• Time calibration signal reception takes from four to

seven minutes, but in some cases it can take up to 14

minutes. Take care that you do not perform any button

operations or move the watch during this time.

• If reception is successful, the second hand will move to

Y (YES). One minute later, the hands will move to the

correct time.

W (WORK)

R (READY)

Y (YES)

N (NO)

Note

• To interrupt a receive operation and return to the Timekeeping Mode, press any

button.

• If reception is not successful, the stopwatch second hand will move to N (NO).

One minute later, the stopwatch second hand will resume normal operation, without

any adjustment of the hand setting.

• If the stopwatch second hand is pointing to Y (YES) or N (NO), you can return to the

Timekeeping Mode by pressing any button.

Viewing the Latest Signal Reception Results

You can use the Receive Result Mode to check if signal reception was performed

correctly.

To check the latest signal reception results

1. In the Timekeeping Mode, press A.

• If the watch was able to perform a successful signal

receive operation since midnight, the stopwatch second

hand will move to Y (YES). If the watch has been unable

to receive any signal successfully, the second hand will

move to N (NO).

• The watch will return to the Timekeeping Mode after five

seconds.

• The current receive result is cleared when the first auto

receive operation is performed on the following day. This

means Y (YES) indicates successful signal reception

since the start of the current day.

• If you adjust the time or date setting manually, the

second hand will move to N (NO).

Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.

• For further information, see “Important!” under “Time Calibration Signal Reception”

and “Radio-controlled Atomic Timekeeping Precautions”.

• You changed the time setting

manually.

•

You performed some button operation

during the auto receive operation.

• Signal reception results are reset

when the first auto receive

operation of the day is performed.

• The Home Time Zone setting is not

correct for the area where you are

using the watch.

The

stopwatch

second hand

is pointing at

N(NO).

Time setting is

incorrect

following signal

reception.

• Perform manual signal

receive or wait until the next

auto signal receive operation

is performed.

• Check to make sure the

watch is in a location where it

can receive the signal.

• Select the correct Home

Time Zone.

What you should doProblem Probable Cause

Stopwatch

The stopwatch lets you measure elapsed time,.

• The display range of the stopwatch is 59 minutes, 59.99

seconds.

• Entering the Stopwatch Mode causes the second hand,

the stopwatch minute hand and stopwatch 1/20 second

hand to move to the 12 o’clock position.

• The stopwatch continues to run, restarting from zero

after it reaches its limit, until you stop it.

• The stopwatch measurement operation continues even

if you exit the Stopwatch Mode.

• All of the operations in this section are performed in the

Stopwatch Mode, which you enter by pressing C.

Stopwatch 1/20 second hand

* This hand rotates and indicates

the second count during the first

60 seconds.

Second hand

Stopwatch minute

hand

Stopwatch

1/100 second

To measure elapsed time

1. Press B to start the stopwatch.

2. Press B to stop the stopwatch.

• You can resume the measurement operation by pressing B again.

• The 1/20 second hand rotates during the first 60 seconds only, and then stops.

When elapsed timing is stopped (by pressing B), this hand jumps to the 1/20

second indication (which is kept internally).

3. Check the elapsed time.

• Press A to reset the stopwatch.

Dual Time

The Dual Time Mode lets you view the current time in 29

time zones around the world.

• Time zones are indicated on the digital display by their

GMT differential values.

• For full information on time zones, see the “Time Zone

Table”.

• The watch will perform a signal receive operation even if

it is in the Dual Time Mode when a calibration time is

reached. If this happens, the Dual Time Mode time

settings will be adjusted in accordance with the current

time in the Timekeeping Mode’s Home Time Zone.

• All of the operations in this section are performed in the

Dual Time Mode, which you enter by pressing C.

GMT differential

value(+1.0)

To view the time in another time zone

While in the Dual Time Mode, press B to scroll eastward through time zones.

• When you release B, the hands will move to the current time in that time zone after

about one second.

• If the current time shown for a time zone is wrong, check the Timekeeping Mode

time setting and your Home Time Zone setting, and make the necessary changes.

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