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Operation Guide 3155

6

Important!

Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
possible.

This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.

Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.

All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 5 and
when you have the battery replaced.

Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.

Level

1

2

3

4

5

Battery Power Indicator

Function Status

All functions enabled.

All functions enabled.

Auto and manual receive,
illumination, and beeper
disabled.

Except for timekeeping and
the 

C

 (charge) indicator, all

functions and display
indicators disabled.
All functions disabled.

(Charge Soon Alert)

Battery power
indicator

ll

ll

lll

ll

ll

l l l l l l l l

ll

ll

ll

ll

ll

ll

ll

l l

ll

ll

ll

l l l ll

ll

c

The flashing 

LOW

 indicator at Level 3 tells you that battery power is very low, and

that exposure to bright light for charging is required as soon as possible.

At Level 5, all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 after falling to Level 5, reconfigure the
current time, date, and other settings.

The watch’s Home City code setting will change automatically to 

TYO

 (Tokyo)

whenever the battery drops to Level 5. With this Home City code setting, the watch is
configured to receive the time calibration signals of Japan. If you are using the watch
in North America or Europe, or China you will need to change the Home City code
setting to match your location whenever the battery drops to Level 5.

Display indicators reappear as soon as the battery is charged from Level 5 to Level
2.

Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading temporarily that is higher
than the actual battery level. The correct battery level should be indicated after a few
minutes.

Performing illumination, or beeper operations during a
short period may cause 

 

(recover) to appear on the

display. Illumination, alarm, countdown timer alarm, and
hourly time signal will be disabled until battery power
recovers.
After some time, battery power will recover and 
(recover) will disappear, indicating that the above
functions are enabled again.

If 

 

(recover) appears frequently, it probably means

that remaining battery power is low. Leave the watch in
bright light to allow it to charge.

l l l l

ll

ll

ll

ll

ll

l l

l l

Recover indicator

Charging Precautions

Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.

Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.

On the dashboard of a car parked in direct sunlight

Too close to an incandescent lamp

Under direct sunlight

Charging Guide

After a full charge, timekeeping remains enabled for up to about seven months.

The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.

Since these are the specs, we can include all the technical details.

Watch not exposed to light

Internal timekeeping

Display on 18 hours per day, sleep state 6 hours per day

1 illumination operation(1.5 second) per day

10 seconds of alarm operation per day

Measurement of 26 Rally Mode stages per month

Approximately 4 minutes of signal reception per day

Stable operation is promoted by frequent exposure to light.

Approximate

Exposure Time

5 minutes
24 minutes
48 minutes
8 hours

Exposure Level (Brightness)

Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)

Recovery Times

The table below shows the amount exposure that is required to take the battery from
one level to the next.

Approximate Exposure Time

Level 5

Level 4 Level 3

Level 2

Level 1

2 hours

26 hours

7 hours

6 hours

129 hours

36 hours

11 hours

263 hours

73 hours

118 hours

- - - - - - - -

- - - - - - - -

Exposure Level
(Brightness)

Outdoor Sunlight
(50,000 lux)
Sunlight Through a Window
(10,000 lux)
Daylight Through a Window
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
(500 lux)

The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.

Timekeeping

Press the 

B

 button to toggle the lower display between

the day of the week and date, and the currently selected
World Time city and time (Dual Time).
Use the Timekeeping Mode to set and view the current
time and date.

Hour : Minutes
Seconds

Dual time

Month – Day

Current Time

PM
indicator

Day of
week

Dual Time

Seconds

City code

B

B

Read This Before You Set the Time and Date!

This watch is preset with a number of city codes, each of which represents the time
zone where that city is located. When setting the time, it is important that you first
select the correct city code for your Home City (the city where you normally use the
watch). If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.

Note that all of the times for the World Time Mode city codes are displayed in
accordance with the time and date settings you configure in the Timekeeping Mode.

To set the time and date manually

1. In the Timekeeping Mode hold down 

A

 until the city

code starts to flash, which indicates the setting screen.

2. Use 

D

 and 

B

 to select the city code you want.

Make sure you select your Home City code before
changing any other setting.

l ll

lll

ll

ll

l l l l

For full information on city codes, see the “UTC Differential/City Code List”.

3. Press 

C

 to move the flashing in the sequence shown below to select the other

setting.

Seconds

12/24-Hour 

Format

Hour

Minutes

DST

Month

Year

City Code

Day

Power Saving

The following steps explain how to configure timekeeping settings only.

4. When the timekeeping setting you want to change is flashing, use 

D

 or 

B

 to

change it as described below.

Screen:

To do this:

Change the city code

Cycle between Auto DST (

A

vtA

), Daylight

Saving Time (

ON

) and Standard Time

(

OFF

).

Toggle between 12-hour (

) and 24-

hour (

) timekeeping

Reset the seconds to 
Toggle the display illumination duration
between 1.5 and 3 seconds
Change the hour and minutes

Change the year, month, or day

Toggle between Power Saving on (

) and

off (

)

Do this:

Use 

D

 (east) and 

B

(west).
Press 

D

.

Press 

D

.

Press 

D

.

Press 

B

.

Use 

D

 (+) and 

B

 (–).

Press 

D

.

5. Press 

A

 to exit the setting screen.

Auto DST (

A

vtA

) can be selected only while 

LIS

LON

M

AD

PAR

RO

M

,

BER

STO

ATH

M

OW

TPE

SEL

TYO

HNL

ANC

YVR

LAX

YEA

,

DEN

M

EX

CHI

M

IA

YTO

NYC

YHZ

, or 

YYT

 is selected as the Home

City code. For more information, see “Daylight Saving Time (DST)” below.

The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.

12-hour and 24-hour timekeeping

With the 12-hour format, the 

P

 (PM) indicator appears to the left of the hour digits for

times in the range of noon to 11:59 p.m. and no indicator appears to the left of the
hour digits for times in the range of midnight to 11:59 a.m.

With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.

The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.

Summary of Contents for 3155

Page 1: ...al You also can perform a manual procedure to set the time and date when necessary The first thing you should do after purchasing this watch is to specify your Home City the city where you normally will use the watch For more information see To specify your Home City below When using the watch outside the areas covered by the time signal transmitters you will have to adjust the current time settin...

Page 2: ...ht 1 00 am 2 00 am 3 00 am 4 00 am 5 00 am and Daylight Saving Time Next day HNL ANC LAX DEN CHI NYC YVR YEA MEX MIA YTO YHZ YYT 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 calibr...

Page 3: ...he value you want You can use the B button to select the target time you want while the current target time is reset to its initial value LT 01 0 10 LT 07 1 30 LT 02 0 20 LT 08 2 00 LT 03 0 30 LT 09 3 00 LT 04 0 40 LT 10 5 00 LT 05 0 50 OFF LT 06 1 00 LT 05 LT 05 target time 0 50 To change a target time 1 While the current target time is reset to its initial value in the Rally Mode hold down A unt...

Page 4: ...imekeeping Mode is correct Select a city code in the World Time Mode to display the current time in any particular time zone around the globe See the UTC Differential City Code List for information about the UTC differential settings that are supported City code Current time in selected city All of the operations in this section are performed in the World Time Mode which you enter by pressing C To...

Page 5: ...Use D and B to change the setting Setting Hours Minutes Screen To use the countdown timer Press D while in the Countdown Timer Mode to start the countdown timer The countdown timer operation continues even if you exit the Countdown Timer Mode Press D while a countdown operation is in progress to pause it Press D again to resume the countdown To stop a countdown operation completely first pause it ...

Page 6: ...e After a full charge timekeeping remains enabled for up to about seven months The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations Since these are the specs we can include all the technical details Watch not exposed to light Internal timekeeping Display on 18 hours per day sleep state 6 hours per...

Page 7: ...ignal bounces off the ionosphere Because of this such factors as changes in the reflectivity of the ionosphere as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible Even if the time calibration signal is received properly certain conditions can cause the...

Page 8: ... a problem with the watch Pago Pago Honolulu Anchorage Vancouver Los Angeles Edmonton Denver Mexico City Chicago Miami Toronto New York 11 0 10 0 09 0 08 0 07 0 06 0 05 0 PPG HNL ANC YVR LAX YEA DEN MEX CHI MIA YTO NYC UTC Differential City Code List City City UTC Code Differential SCL YHZ YYT RIO RAI UTC LIS LON MAD PAR ROM BER STO Santiago Halifax St Johns Rio De Janeiro Praia Lisbon London Madr...

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