Casio MA0312-EA User Manual

MA0312-EA

Operation Guide 3318

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright
light.

• Be sure to read “Battery” for important information you need to know when
exposing the watch to bright light.

After purchasing the watch, be sure to remove the spacer from the crown.

Crown

Power Saving

indicator
Battery power
indicator (H/M/L)

About This Manual

A spacer is inserted under the crown at the factory to keep
the watch in a Power Saving Mode, which conserves
battery power. Remove the spacer as shown in the
illustration to the left before using the watch.

Spacer

• Power Saving is turned on while the crown of the watch
is pulled out.

• Perform the following steps before using the watch for
the first time. If the battery power indicator shows
(Level 3) or if the digital display is totally blank (Level 4),
expose the watch to light until the battery power
indicator changes to
performing the following operations.

1. Press any button to exit the Power Saving Mode
and display the digital time setting screen.

2. Set the digital time.

3. Set the analog time.

• See “Power Saving” for more information about the

Crown

Power Saving feature and how to use it.

• Button operations are indicated using the letters shown
in the illustration.

• For the sake of simplicity, the sample displays in this
manual do not show the analog hands of the watch.

• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.

(Level 2) or (Level 1) before

General Guide

• Perform the operations described below to change between modes.

• In the Timekeeping Mode, press A to illuminate the face of the watch.

Time Setting ModeTimekeeping Mode Power Saving Mode

Pull out
the crown.

No operation
for two or three
minutes

3. When the setting you want to change is flashing, use A to change it as described

below.

Screen

To do this:

:35

Reset the seconds to

P10:08

Change the hour or minutes

12 H

Toggle between 12-hour (
timekeeping

2004

Change the year

6-30

Change the month or day
Toggle the illumination duration setting between one

second (x) and three seconds ( )

EN6

Change the day of the week language setting

• See “Day of the Week Languages” for more information.

• Holding down A changes the setting at high speed.

4. Adjust the analog time.

5. After adjusting the digital and analog times, push in the crown to exit the Time
Setting Mode.

• For more information about illumination duration, see “Illumination”.

• The default illumination duration setting is one second when you purchase the

watch and any time after battery power drops to Level 4.

• If you do not perform any button operation for two or three minutes while the setting

screen is on the display, the watch automatically enters the Power Saving Mode.

Day of the Week Languages

You can select one of six different languages (English, Spanish, French, German,
Italian, Russian) for display of the day of the week.

• The default day of the week language when you purchase the watch or after battery

power drops to level 4 is English.

• See the “Day of the Week List” for information about how days of the week are

displayed in each language.

To change the day of the week language setting

Language

Language Setting

Screen

Setting the Analog Time

Perform the procedure below when the time indicated by the analog hands does not
match the time of the digital display.

• When

(Level 3) is indicated for the battery power level, the second hand moves at

2-second intervals. For details, see “Battery Power Indicator and Recover Indicator”.

To adjust the analog time

Hour hand Minute hand

00

12H

) and 24-hour (

1. Pull out the crown so the seconds digits are flashing.
This is the Time Setting Mode.

• The analog hands stop moving when the setting

screen is displayed.

2. Press B eight times to display the language setting
screen.

3. Press A to cycle through the language settings in the
following sequence.

Crown

(English) (Spanish) (French)

(Russian) (Italian) (German)

4. Adjust the analog time.

5. After adjusting the analog time, push in the crown to
exit the Time Setting Mode.

1. Pull out the crown so the seconds digits are flashing.
This is the Time Setting Mode.

• The analog hands stop moving when the setting

screen is displayed.

2. Rotate the crown to advance the minute hand to the
setting you want. Move the minute hand so it is four or
five minutes past the point where you will finally set it,
and then rotate the crown in the opposite direction to
move the minute hand back to the setting you want.

3. Press the crown back in when the seconds count on
the digital display matches the current location of the
analog second hand.

• This re-starts analog timekeeping and returns to the

CrownSecond hand

Timekeeping Mode.

24H

Do this:

Press A.
Use A (+).

)

Press A.

Use A (+).

Press A.

Crown

Push in
the crown.

Press any
button.

Setting the Current Time

This watch features separate digital and analog timekeeping. The procedures for
setting the digital time and analog time are different.

Setting the Digital Time and Date

The digital display shows the current digital time and date. When setting the digital
time and date, you can also specify 12-hour or 24-hour format, the illumination
duration, and the day of the week language.

• Whenever you need to adjust both the digital and the analog time settings, make
sure you adjust the digital setting first.

To set the digital time and date

1. Pull out the crown so the seconds digits are flashing.
This is the Time Setting Mode.

• The analog hands stop moving when the setting

screen is displayed.

• If the watch is in the Power Saving Mode and the

crown is already pulled out, first press any button to
exit the Power Saving Mode. This will display the

Crown

setting screen.

2. Use B to move the flashing in the sequence shown
below to select other settings.

Seconds

Hour Year

Language

Illumination

Duration

Minutes

12/24-Hour

Day Month

Format

Timekeeping

• In the Timekeeping Mode, pressing B cycles through available screen formats as

shown below.

Current TimeCalender Battery Power Indicator

Day of week

To check the current day of the week language setting and illumination duration
setting

In the Timekeeping Mode, hold down B. This will display a screen like the one shown
below, which shows indicators for the current day of the week language setting and
the illumination duration setting.

• See the “Day of the Week List” for the meaning of each indicator.

• The current illumination duration is indicated as

Language

Illumination duration

Hour : Minutes Battery power indicator

Press .

PM indicator Day Seconds

and Seconds Count

x

(one second) or (three seconds).

1

Operation Guide 3318

Illumination

Auto light
switch on indicator

About the Auto Light Switch

Turning on the auto light switch causes the face to illuminate, whenever you position
your wrist as described below in any mode. Note that this watch features a “Full Auto
Light,” so the auto light switch operates only when available light is below a certain
level. It does not illuminate the face under bright light.

Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes the face to become illuminated.

• Wear the watch on the outside of your wrist.

Warning!

• Always make sure you are in a safe place whenever you are reading the face
of the watch using the auto light switch. Be especially careful when running or
engaged in any other activity that can result in accident or injury. Also take
care that sudden illumination by the auto light switch does not surprise or
distract others around you.

• When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create
a distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down A for about two seconds to toggle the auto light
switch on (

• The auto light switch is automatically turned off whenever battery power is at Level 3 .

displayed) or off ( not displayed).

After battery power recovers to Level 2, you will have to perform the above procedure
to turn the auto light switch back on again.

Two LEDs (light-emitting diodes) and a light guide panel
illuminate the face of the watch for easy reading in the dark.
The watch’s auto light switch automatically illuminates the
face when you angle the watch towards you for reading.

• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.

• See “Illumination Precautions” for more important
information.

To illuminate the face of the watch

In the Timekeeping Mode, press A to illuminate the face
of the watch.

• You can specify one second or three seconds as the
illumination duration. See “To set the digital time and
date” for more information.

• The above operation illuminates the face regardless of
the current auto light switch setting.

Parallel to ground More than 40

°

Power Saving

Power Saving indicator

To enter the Power Saving Mode

1. Pull out the crown so the seconds digits are flashing. This is the Time Setting Mode.

2. Do not perform any button operation for about two or three minutes. This will cause
the watch to enter the Power Saving Mode automatically.

To exit the Power Saving Mode

Perform any one of the following operations.

• Press any button

This enters the Time Setting Mode. At this time you could adjust the digital time and
then set the analog time.

• Push in the crown

This enters the Timekeeping Mode.

When you do not plan to use the watch for some time,
you can put it into a Power Saving Mode to conserve
battery power. When the watch is in the Power Saving
Mode:

• The Power Saving indicator (
display.

• Analog timekeeping is disabled.

• Digital timekeeping is maintained.

Note

• Whenever you exit the Power Saving Mode (see below),
be sure to set the correct analog time.

Crown

PS

) flashes on the digital

Battery

This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.

Example: Orient the watch so its face is

pointing at a light source.

• The illustration shows how to position a
watch with a resin band.

• Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.

• Normally, you should try to keep the
watch outside of your sleeve as much
as possible. Charging is significantly
reduced if the face is only partially
covered.

Solar cell

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 bright light can cause rechargeable
battery power to run down. Be sure that the watch is normally exposed to bright light
whenever possible.

• This watch employs a solar cell that converts light into electricity, which charges a
built-in rechargeable battery. Normally, the rechargeable battery should not need
replacement, but after very long use over a number of years, the rechargeable
battery may lose its ability to achieve a full charge. Should you notice problems with
getting the rechargeable battery to a full charge, contact your dealer or CASIO
distributor about having the rechargeable battery replaced.

• The rechargeable battery should be replaced with a CASIO-specified ML2016
battery only. Other rechargeable batteries can cause damage to the watch.

• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 4 and when you have the battery replaced.

• Put the watch into the Power Saving Mode 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.

• The battery power indicator appears on the following screens.

Timekeeping Mode’s Battery Power Indicator and Seconds Count screen.
Power Saving Mode screen.

Battery power indicator

Recover indicator

• The flashing C 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 4, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the digital time and date after the battery reaches Level
3 (indicated by flashing C indicator) from Level 4. You will not be able to change the
analog time setting until the battery reaches Level 2 (no C indicator) after dropping
to Level 4.

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

• If you use illumination a number of times during a short period, the recover indicator
(R) appears on the display and illumination becomes disabled until battery power
recovers. After some time, battery power will recover and the recover indicator (R)
will disappear, indicating that the above function is enabled again.

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 6 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.

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)

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

• Watch is not exposed to light

• Internal timekeeping

• 1 light operation (1.5 seconds) per day

• Stable operation is promoted by frequent charging.

Recovery Times

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

(Brightness)

Outdoor Sunlight (50,000 lux)
Sunlight Through a Window

(10,000 lux)
Daylight Through a Window on a

Cloudy Day (5,000 lux)

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

Exposure Level (Brightness)

Level

1
2

3

(Charge Soon Alert)

4

Approximate Exposure TimeExposure Level

Battery Power
Indicator

C

Level 4 Level 3

39 hours

146 hours

– – –

Function Status

All functions enabled.
All functions enabled.
Face illumination and auto

light switch disabled. Second
hand moves at 2-second
intervals. After two or three
days, analog hands will stop,
but digital time will continue to
be kept internally.

All functions, including
timekeeping, are disabled.

Approximate
Exposure Time

8 minutes
30 minutes
48 minutes
8 hours

Level 2

17 hours

64 hours

103 hours

Level 1

16 hours

60 hours

96 hours

2