Operation Guide 5334
E-9
Charging Time to Recover from Dead Battery
Exposure Level
(Brightness)
Approximate Charging
Time to 1-second Hand
Movement
Approximate Time to
Full Charge
Outdoor sunlight (50,000 lux) 4 hours 26 hours
Sunlight through a window
(10,000 lux)
12 hours 98 hours
Daylight through a window on
an overcast day (5,000 lux)
19 hours 156 hours
Indoor fluorescent lighting
(500 lux)
187 hours – – –
Note
x Actual charging time depends on environmental conditions.
E-8
Charging Time
The times below are general guidelines for reference only.
Charging Time to Support Daily Use
Exposure Level (Brightness) Approximate Charging Time
Outdoor sunlight (50,000 lux) 8 minutes
Sunlight through a window (10,000 lux) 30 minutes
Daylight through a window on an overcast day
(5,000 lux)
48 minutes
Indoor fluorescent lighting (500 lux) 8 hours
E-7
Low Battery Alert
The second hand will jump at two-second intervals to alert you when the charge is
low.
Regular Timekeeping
2-second jump
Low charge
Low Battery Alert
Charged
E-6
Caution!
x The case of the watch may become quite hot when charging. Guard against burn
injury after charging.
x Avoid charging in the following locations, and anywhere else where the watch may
become very hot.
− On the dashboard of an automobile parked in the sun
− Close to an incandescent light source or other sources of heat
− Locations exposed to direct sunlight for long periods
Low Charge and Dead Battery Conditions
An alert operation is performed when the battery charge goes low.
E-5
Solar Charging
A solar panel generates electrical power that charges a built-in (secondary) battery.
The entire face is a solar panel, so power is generated when the face is exposed to
light. Keep the watch exposed to light as much as possible.
Charging the Battery
When you are not wearing the watch, leave it where it is exposed
to light. For stable operation, expose the watch to at least a half
day of light per month.
When wearing the watch, try to keep your clothing from blocking
its face (solar panel). Charging efficiency is reduced significantly
even if the face is blocked only partially.
E-3
Crown Operations
Some water-resistant models (100meters, 200meters)
have a screw-in crown. When you need to perform a crown
operation, rotate it towards you to unscrew it. Then pull
the crown out. Avoid applying undue force when pulling.
The watch loses its water resistance while the crown is
unscrewed. After performing a crown operation, fully screw
the crown back in.
Crown
Loosen
If your watch has a rotary bezel...
You can rotate the bezel to align its
▼
mark with
the minute hand. Then you will be able to tell how
much time has elapsed since aligning the
▼
mark.
Start
Elapsed time
Current
E-2
Before Using the Watch for the First Time
Crown
Spacer
x Depending on your watch model, there may be a spacer
installed at the factory around the crown. If your watch has
a spacer, you should remove the spacer before using the
watch.
x After removing the spacer, use the procedures in “Crown
Operations” (page E-3) and “To adjust the time setting”
(page E-11) to set up the watch for use.
E-1
ENGLISH
x Be sure to keep all user documentation handy for future reference.
x Your watch may differ somewhat from the one shown in the illustration.
MA2604-EB
© 2013 CASIO COMPUTER CO., LTD.
Published: 4/2026
Contents
E-2 Before Using the Watch for the First Time
E-5 Solar Charging
E-10 Indicators and Crown Operation
E-11 Setting the Current Time and Day
E-11 To adjust the time setting
E-12 To change the day indicator setting
E-13 Using the Stopwatch
E-17 Abnormal Hand Movement or Function
E-19 Specifications
E-4
Operation Guide 5334
E-19
Specifications
Accuracy: ±20 seconds average per month
Stopwatch: Measuring Capacity: 59'59.95" (60 minutes)
Measuring Unit: 1/20 second
Measurements: Elapsed time; split time; two finishes
Other: Low battery alert
Power Supply: Solar panel and one rechargeable battery (Type: MT920)
Battery nominal voltage: 1.5V
Approximate battery operating time: 5 months (no exposure to light after a full
charge)
E-18
Important!
x Timekeeping stops while the crown is pulled out. Correct the current time setting
after performing the above operation.
Reference
x To adjust the time setting (page E-11)
x To change the day indicator setting (page E-12)
E-17
Abnormal Hand Movement or Function
Should the watch ever exhibit abnormal hand movement or function, or if the second
hand does not move normally (one-second increments) even after the watch is fully
charged, perform the procedure below to perform a system reset.
1. Pull the
Crown out to Click 2.
2. Hold down both A and B for about two seconds.
3. Push the Crown back in.
x The second hand will start to move.
x If the second hand is jumping at two-second intervals, expose the watch to light
to charge it (page E-5).
4. If the Stopwatch Hands do not return to their 0 (zero) positions when you
reset the stopwatch, correct their 0 positions (page E-15).
E-16
x Holding down B moves the current hand at high speed.
3. Hold down A for about two seconds, the
Stopwatch Second Hand will rotate
to indicate the second hand setting mode.
x If the hand does not align with 12 o’clock, use the B button to adjust it.
x Holding down B moves the current hand at high speed.
4. Hold down A for about two seconds, the
Stopwatch Minute Hand will rotate
to indicate the minute hand setting mode.
x If the hand does not align with 12o’clock, use the B button to adjust it.
x Holding down B moves the current hand at high speed.
5. After all of the hands are the way you want, push the
Crown back in.
Important!
x Timekeeping stops while the crown is pulled out. Correct the current time setting
after performing the above operation.
E-15
Note
x The Stopwatch Hands move for only the first 60 minutes of an elapsed time
operation. After that, they stop at the 12 o’clock position.
x The stopwatch will not operate while the second hand is jumping at two-second
intervals, which indicates that the watch’s charge is low.
x If a low charge state (indicated by the second hand jumping at two-second
intervals) is entered while a stopwatch operation is in progress, the stopwatch will
reset automatically to zero.
Correcting the 0 Positions of the Stopwatch Hands
Perform the following procedure if the stopwatch hands do not return to their 0 (zero)
positions when you reset the stopwatch.
1. Pull the
Crown out to Click 2.
2. Hold down A for about two seconds, the Stopwatch 1/20-second Hand will
rotate to indicate the 1/20-second hand setting mode.
x If the hand does not align with 12 o’clock, use the B button to adjust it.
E-14
Two finishes
A
B A B B
Start Split
First runner
finishes.
Display time of
first runner.
Stop
Second runner
finishes.
Split release
Display time of
second runner.
Reset
Important!
x Do not operate the stopwatch with the crown pulled out.
E-13
Using the Stopwatch
The stopwatch measures elapsed time in 1/20-second increments up to 59minutes,
59.95seconds.
Elapsed time
A
A A A B
Start Stop Re-start Stop Reset
Split time
A
B B A B
Start Split Split release Stop Reset
E-12
To change the day indicator setting
1. Pull the Crown out to Click 1.
2. Rotate the Crown away from you to set the day.
3. Push the Crown back in.
Note
x The day indicator setting uses a 31-day month. Make adjustments for months of
shorter lengths.
x Avoid changing the day indicator setting between the hours of 9 p.m. and 1 a.m.
Otherwise, the day indicator may not change correctly at midnight.
E-11
Setting the Current Time and Day
To adjust the time setting
1. When the second hand is at 12 o’clock, pull the Crown out to Click 2.
2. Rotate the
Crown to change the time setting.
3. Push the
Crown back in.
Note
x Take care that you set the correct AM or PM time.
x When changing the time, move the minute hand four or five minutes past your final
setting, and then back it up to the setting you want.
E-10
Indicators and Crown Operation
Second Hand
Day Indicator
Click 2
Crown
Click 1
Stopwatch Minute Hand
Stopwatch Second Hand
Minute Hand
Hour Hand
Stopwatch 1/20-second Hand
Stopwatch functions
