Operation guide 5055 – Casio 5055 User Manual

Page 2

Operation Guide 5055

• Proper signal reception can be difficult or even impossible under the conditions listed

below.

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

• Time calibration signal reception 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 operations or move the watch during this time.

Inside or
among
buildings

Inside a
vehicle

Near a
construction
site, airport, or
other sources
of electrical
noise

Near high-
tension power
lines

Among or
behind
mountains

Near household
appliances,
office
equipment,
or a mobile
phone

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

Home City code setting as shown below.

Home City Code

LON, PAR, BER, ATH,

LIS, MAD, ROM, STO, MOW*

HKG, BJS

TPE, TYO, SEL

HNL*, ANC*, LAX, DEN,

CHI, NYC, YVR, YEA, MEX,

MIA, YTO, YHZ, YYT

Frequency

60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz

60.0 kHz

Transmitter

Anthorn (England)
Mainflingen (Germany)
Shangqiu City (China)
Fukushima (Japan)
Fukuoka/Saga (Japan)

Fort Collins, Colorado
(the United States)

* The areas covered by the HNL, ANC, and MOW city codes are quite far from the

time calibration signal transmitters, and so certain conditions may cause problems
with signal reception.

• Calibration signal reception is disabled while a countdown timer operation is in

progress.

Approximate Reception Ranges

2,000 miles
(3,000 kilometers)

U.K. and German Signals

Anthorn

Mainflingen

1,500 kilometers

500 kilometers

The Anthorn signal is
receivable within this
area.

U.S. Signal

Fort Collins

600 miles
(1,000 kilometers)

Japan Signals

1,000 kilometers

Fukuoka/Saga

500 kilometers

Fukushima

500 kilometers

Changchun

Beijing

1,500 kilometers

China Signal

Shanghai

Hong Kong

Shangqiu

Chengdu

Signals are receivable in the Taiwan area when reception conditions are good.

• Signal reception may not be possible at the distances that are futurer than those

noted below during certain times of the year or day. Radio interference may also
cause problems with reception.

Mainflingen (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: 1500 kilometers (910 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.

Midnight*
1:00 am*
1:00 am*
2:00 am*

2:00 am*
3:00 am*
3:00 am*
4:00 am*

About Auto Receive
The watch receives the time calibration signal automatically up to six times a day (five
times for the China signal). 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 City, and whether standard time or Daylight
Saving Time is selected for your Home City.

1:00 am
2:00 am
2:00 am
3:00 am

3:00 am
4:00 am
4:00 am
5:00 am

2:00 am
3:00 am
3:00 am
4:00 am

4:00 am
5:00 am
5:00 am
Midnight*

3:00 am
4:00 am
4:00 am
5:00 am

5:00 am
Midnight*
Midnight*
1:00 am*

4:00 am
5:00 am
5:00 am
Midnight*

Midnight*
1:00 am*
1:00 am*
2:00 am*

5:00 am
Midnight*
Midnight*
1:00 am*

1:00 am*
2:00 am*
2:00 am*
3:00 am*

LON

LIS

PAR
BER

MAD
ROM

STO
ATH

MOW

Standard Time
Daylight Saving Time
Standard Time
Daylight Saving Time

Your Home City

Auto Receive Start Times

HKG

BJS
TYO
TPE
SEL

HNL
ANC
LAX
DEN

CHI

NYC
YVR
YEA
MEX

MIA

YTO
YHZ
YYT

Standard Time

Standard Time and
Daylight Saving Time

1:00 am

Midnight

2:00 am

1:00 am

3:00 am

2:00 am

4:00 am

3:00 am

5:00 am

4:00 am

5:00 am

*Next day

Note

• When a calibration time is reached, the watch will receive the calibration signal only

if it is in either the Timekeeping Mode or World Time Mode. Reception is not
performed if a calibration time is reached 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 two to 14 minutes everyday when the

time in the Timekeeping Mode reaches a calibration time. Do not perform any button
operation within 14 minutes before or after the calibration times. Doing so can
interfere with correct calibration.

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

your Home City, as kept 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 digital display will go blank, and the left dial hand

will move to R (READY). This indicates that the watch is
getting ready for time calibration signal reception.

• See the information under “Signal Reception

Troubleshooting” if you experience problems.

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

while actual reception is in progress.

• If signal reception is unstable during reception, the left

dial hand may move between W (WORK) and
R (READY).

• The hour and minute hands continue to keep time

normally.

Receiving

R (READY)

W (WORK)

• Time calibration signal reception takes from two to

7 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.

• When signal receive operation is successful, GET

appears on the upper display and the lower display
shows the time and date of the successful operation.
The watch will adjust its time setting in accordance to
with the information provided by the signal.

• The watch will return to the Timekeeping Mode if you

press A or if you do not perform any operation for
about one or two minutes.

• ERR will appear on the upper display if the receive

operation is not successful. The watch will not adjust its
time setting in this case. Press A to return to the
Timekeeping Mode.

Receive failed

Receive successful

Note

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

button.

To check the latest signal reception results

In the Timekeeping Mode, press A to view the last successful receive time and date.
Press A again to return to the previous screen.

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Date

Hour : Minutes