Casio MA0911 -EB Manual De Usuario

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MA0911 -EB

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. Because of this, the 
radio-controlled atomic timekeeping function will not display the correct time for Newfoundland, Canada.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by you 
or any third party arising through the use of this product or its malfunction.

Button operations are indicated using the letters 

A through D shown in the 

illustration.

Hand Functions
z 

z  Hour Hand

x 

x  Second Hand

c 

c  Minute Hand

v 

v  Left Dial Hand:  Indicates the current day of the week and current mode.

b 

b  Right Dial Hands:  Indicate a time, in 24-hour format, depending on the current 

mode.

n 

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

C for about two seconds to enter the Timekeeping Mode, and then observe the 

x Second Hand.

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? 

Go to step 2.

The watch is charged suffi ciently. For details 
about charging, see “Charging the Watch”.

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

NO

YES

YES

NEXT

Use the procedure under “To confi gure Home City settings” to confi gure your Home City and daylight saving 
time settings.

Important!
Proper time calibration signal reception and World Time settings depend on correct Home City, time, and 
date settings in the Timekeeping Mode. Make sure you confi gure these settings correctly.

 

 



To set the time using a time calibration signal
See “To get ready for a receive operation”.
 

 



To set the time manually
See “Confi guring Current Time and Date Settings Manually”.

 For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic 

 



Timekeeping”.

The face of the watch is a solar cell 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.

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

 Best charging performance 

 



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

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

 The watch may enter a sleep 

 



state if its face is blocked by your 
sleeve even only partially.

On the dashboard of a car parked in direct sunlight

 



Too close to an incandescent lamp

 



Under direct sunlight

 



 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.
 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.

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

x Second Hand in the Timekeeping Mode.

 If the 

 



x Second Hand is moving normally at one-second 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.

1

Normal.

All functions enabled

2

x Second Hand moves at two-second 

intervals.

n Day changes to 1 (home position).

Beeper, time calibration signal 
reception disabled

3

x Second Hand stopped.

 z

 z Hour Hand and c Minute Hand stopped 

at 12 o’clock.

All functions disabled

 When power drops to Level 3, all functions will be disabled but the watch will 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 normal 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.

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.

Outdoor sunlight (50,000 lux)

8 minutes

2 hours

23 hours

Window sunlight (10,000 lux)

30 minutes

6 hours

90 hours

Window sunlight on cloudy day (5,000 lux)

48 minutes

8 hours

– – –

Indoor fl uorescent lighting (500 lux)

8 hours

92 hours

– – –

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 The above times are for reference only. Actual times depend on lighting conditions.

 



 For details about the operating time and daily operating conditions, see the “Power Supply” section of the 

 



Specifi cations.

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”.

 



60 to 70 minutes (second hand sleep)

x Second Hand only stopped at 12 o’clock, all other functions enabled

6 or 7 days (function sleep)

 All functions, including analog timekeeping, disabled

 



 Internal timekeeping maintained

 



 The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is already in a sleep state 

 



when 6:00 AM arrives, however, it will remain in the sleep state.
 The watch will not enter a sleep state while it is in the Stopwatch Mode.

 



To recover from the sleep state
Move the watch to a well-lit area or press any button.

This watch receives a time calibration signal and updates its time setting accordingly. However, when using 
the watch outside of areas covered by time calibration signals, you will have to adjust the settings manually as 
required. See “Confi guring Current Time and Date Settings Manually” for more information.

This section explains how the watch updates its time settings when the city code selected as the Home City is 
in Japan, North America, Europe, or China, and is one that supports time calibration signal reception.

LON, PAR, ATH

Anthorn (England), Mainfl ingen (Germany)

HKG

Shangqiu City (China)

TYO

Fukushima (Japan), Fukuoka/Saga (Japan)

HNL, ANC, LAX, DEN, CHI, NYC

Fort Collins, Colorado (United States)

 The areas covered by 

 



HNL and ANC are quite far from the calibration signal transmitters, so certain 

conditions may cause reception problems.
 When 

 



HNL or HKG is selected as the Home City, only the time and date are adjusted according to the 

time calibration signal. You need to switch manually between standard time and daylight saving time 
(DST) if required. See “To toggle the Home City time between standard time and daylight saving time” for 
information about how to do this.

Moves at two-second 
intervals.

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