Casio 5245 Operation Guide

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MA1108-EA

Operation Guide 5245

About This Manual

Button operations are indicated using the letters A
through D shown in the illustration.

Hand Functions

Hour Hand
Second Hand



E-2

2. Check the Home City and the daylight saving time (DST) setting.

Use the procedure under “To confi gure Home City settings” (page E-20) to confi gure
your Home City and daylight saving time settings.

Important!

World Time settings depend on correct Home City, time, and date settings in the
Timekeeping Mode. Make sure these settings are confi gured correctly.

3. Set the current time.

See “Confi guring Current Time and Date Settings” (page E-24).

The watch is now ready for use.

Minute Hand
24-hour Hand
Left Dial Hands
Right Dial Hand: Indicates the current mode.
Day

This User’s Guide uses numbers shown above to identify
watch hands and indicators.

Congratulations upon your selection of this CASIO watch.

This watch does not have a city code that corresponds to the UTC offset of –3.5
hours for Newfoundland, Canada.

Things to check before using the watch

ENGLISH

1. Hold down C for about two seconds to enter the Timekeeping Mode, and

then observe the movement of the

Is the x Second Hand moving smoothly at one-second intervals?

Is the x Second Hand moving at
two-second intervals or is it stopped
completely?

Power is low. Charge the watch by placing
it in a location where it is exposed to light.
For details, see “Charging the Watch”
(page E-8).

NO

YES

Second Hand.

The watch is charged suffi ciently.
For details about charging, see
“Charging the Watch” (page E-8).

Go to step 2.

YES

NEXT

Contents

E-2 About This Manual

E-3 Things to check before using the watch

E-8 Charging the Watch

E-15 To recover from the sleep state

E-16 Mode Reference Guide

E-17 To determine the watch’s current mode
E-17 To return to the Timekeeping Mode from any other mode
E-18 To select a mode

E-19 Timekeeping

E-1

E-3

E-4

E-20 Confi guring Home City Settings

E-20 To confi gure Home City settings
E-22 To toggle the Home City time between standard time and

E-24 Confi guring Current Time and Date Settings

E-32 Using the Stopwatch

E-36 Checking the Current Time in a Different Time Zone

E-6

daylight saving time

E-24 To change the current time setting
E-27 To change the current date setting

E-33 To perform elapsed time measurement
E-33 To perform an elapsed time operation
E-33 To pause at a split time

E-37 To view the time in another time zone
E-38 To specify standard time or daylight saving time (DST) for a city
E-40 To swap your Home City and World Time City

Charging the Watch

The face of the watch is a solar panel that generates power from light. The generated
power charges a built-in rechargeable battery, which powers watch operations. The
watch charges whenever it is exposed to light.

Charging Guide

E-8

Whenever you are not
wearing the watch, be sure
to leave it in a location
where it is exposed to light.

Best charging

x

performance is achieved
by exposing the watch to
light that is as strong as
possible.

When wearing the watch,
makes sure that its face is
not blocked from light by the
sleeve of your clothing.

The watch may enter a

x

sleep state (page E-14) if
its face is blocked by your
sleeve even only partially.

E-42 Using the Alarm

E-43 To change the alarm time setting
E-43 To turn the alarm on or off
E-43 To stop the alarm

E-44 Adjusting the Home Positions

E-44 To adjust the home positions

E-48 Troubleshooting

E-52 Specifi cations

Warning!
Leaving the watch in bright light for charging 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.

x

On the dashboard of a car parked in direct sunlight
Too close to an incandescent lamp x
Under direct sunlight x

Important!

x

Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to ensure that power does not run down.

x

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 power to run down.
Make sure that the watch is exposed to bright light whenever possible.

E-5

E-7

E-9

Operation Guide 5245

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Power Levels

You can get an idea of the watch’s power level by
observing the movement of the
Timekeeping Mode.

x

Second Hand is moving normally at one-second

If the
intervals, power is at Level 1.
If the

x

Second Hand is moving at two-second intervals,

power is at Level 2, which is quite low. Expose the watch
to light as soon as possible so it can charge.



Moving at two-second
intervals.

E-10

Power Recovery Mode

The watch is designed to go into a power recovery mode that stops hand operation
temporarily whenever power suddenly drops below a certain level due to overuse
of the alarm tone over a short period. Note that all operations are disabled while the
watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal
operation after power recovers (in about 15 minutes). Putting the watch in a location
where it is exposed to light will help power to recover sooner.

E-12

Power Saving

Power Saving enters a sleep state automatically whenever the watch is left for a
certain period in an area where it is dark. The table below shows how watch functions
are affected by Power Saving.

There actually are two sleep state levels: “second hand sleep” and “function sleep”.

x

Elapsed Time in Dark Operation

60 to 70 minutes (second hand
sleep)

6 or 7 days (function sleep)

The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch x
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep
state.

x

The watch will not enter a sleep state while it is in the Stopwatch Mode.

Second Hand only is stopped at 12 o’clock, all other

x

functions are enabled.

All functions, including analog timekeeping, disabled x
Internal timekeeping maintained. x

Second Hand in the

Level Hand Movement Function Status

1 Normal. All functions enabled.

x

Second Hand moving at two-second

2

intervals.

mm Day changes to 1 (home position).
xx Second Hand stopped.

3

zz Hour Hand and cc Minute Hand stopped

at 12 o’clock.

When power drops to Level 3, all functions will be disabled but the watch will x
continue to keep time internally for about one week. If you recharge the battery
suffi ciently during this period, the analog hands will move automatically to the
correct setting and regular timekeeping will resume. After one week, all settings
(including timekeeping) will be cleared. Recharging the battery will reset all settings
to their initial factory defaults.

Beeper disabled.

All functions disabled.

Charging Times

Exposure Level (Brightness)

Outdoor sunlight (50,000 lux) 8 minutes 2 hours 27 hours

Window sunlight (10,000 lux) 30 minutes 6 hours 100 hours

Window sunlight on cloudy day
(5,000 lux)

Indoor fl uorescent lighting (500 lux) 8 hours 112 hours – – –

1 Approximate exposure each day to generate power for normal daily operation. *
2 Approximate exposure to take power up one level. *

The above exposure times all are for reference only. Actual exposure times depend

x

on lighting conditions.
For details about the operating time and daily operating conditions, see the “Power x
Supply” section of the Specifi cations (page E-53).

To recover from the sleep state

Move the watch to a well-lit area or press any button.

Daily

Operation *1

48 minutes 10 hours – – –

Level Change *2

Level 3 Level 2 Level 1

E-11

E-13

E-14

Mode Reference Guide

Your watch has four “modes”. The mode you should select depends on what you
want to do.

To do this: Enter this mode: See:

View the current time in your Home City and in one x
of 29 cities around the globe

Confi gure Home City and daylight saving time x
(DST) settings

Confi gure time and date settings x

Use the stopwatch to measure elapsed time Stopwatch Mode E-32

View the current time in one of 29 cities (time zones)
around the globe

Set an alarm time Alarm Mode E-42

E-16

To select a mode

Press C to cycle between the modes as shown below. The
indicates the currently selected mode.

Timekeeping Mode Stopwatch Mode

The hand indicates
the day of the week.

C

Alarm Mode

The hand points to ALM.

E-18

Timekeeping Mode E-19

World Time Mode E-36

Right Dial Hand

The hand points to 0.

World Time Mode

The hand points to STD
or DST.

Selecting a Mode

With this watch, everything starts from the Timekeeping Mode.

To determine the watch’s current mode

Check the position of the
under “To select a mode” (page E-18).

To return to the Timekeeping Mode from any other
mode



Hold down C for about two seconds until the watch beeps
twice.

Right Dial Hand as shown

Timekeeping

Use the Timekeeping Mode to view the current time and date. To enter the
Timekeeping Mode from any other mode, hold down C for about two seconds.

Hand Functions

Hour Hand
Second Hand
Minute Hand
24-hour Hand: Indicates the current hour in the Home



Left Dial Hands:

Indicate the current time in the World Time City (page
E-36) in 24-hour format.

Right Dial Hand: Indicates the day of the week.
Day

City time in 24-hour format.

E-15

E-17

E-19