Operation Guide
Operation Guide 5612 5613
E-59
•
 Leaving your watch where it is exposed to direct sunlight (ultraviolet rays) for long 
periods or failure to clean dirt from your watch for long periods can cause it to 
become discolored.
•
 Friction caused by certain conditions (strong external force, sustained rubbing, 
impact, etc.) can cause discoloration of painted components.
•
 If there are printed figures on the band, strong rubbing of the printed area can cause 
discoloration.
•
 Leaving your watch wet for long periods can cause fluorescent color to fade. Wipe 
the watch dry as soon as possible after it becomes wet.
•
 Semi-transparent resin parts can become discolored due to sweat and dirt, and if 
exposed to high temperatures and humidity for long periods.
•
 Daily use and long-term storage of your watch can lead to deterioration, breaking, or 
bending of resin components. The extent of such damage depends on usage 
conditions and storage conditions.
E-58
Chemicals
•
 Do not allow your watch to come into contact with thinner, gasoline, solvents, oils, or 
fats, or with any cleaners, adhesives, paints, medicines, or cosmetics that contain 
such ingredients. Doing so can cause discoloration of or damage to the resin case, 
resin band, leather, and other parts.
Storage
•
 If you do not plan to use your watch for a long time, thoroughly wipe it free of all dirt, 
sweat, and moisture, and store it in a cool, dry place.
Resin Components
•
 Allowing your watch to remain in contact with other items or storing it together with 
other items for long periods while it is wet can cause color on resin components to 
transfer to the other items, or the color of the other items to transfer to the resin 
components of your watch. Be sure to dry off your watch thoroughly before storing it 
and make sure it is not in contact with other items.
E-57
Magnetism
•
 Though this watch is designed to maintain normal performance in DC magnetic 
fields up to 4800 A/m, it should not be allowed to come into contact with or be 
located close to a source of strong magnetism (audio speakers, magnetic necklace, 
cell phone, etc.) Sources of strong magnetism can affect the motor that moves the 
hands of the watch, causing them to slow down, speed up, or stop, resulting in the 
incorrect time being displayed.
•
 Very strong magnetism (from medical equipment, etc.) should be avoided because it 
can cause malfunction of your watch and damage to electronic components.
Electrostatic Charge
•
 Exposure to very strong electrostatic charge can cause your watch to display the 
wrong time. Very strong electrostatic charge even can damage electronic 
components.
•
 Electrostatic charge can cause the display to go blank momentarily or cause a 
rainbow effect on the display.
E-56
Temperature
•
 Never leave your watch on the dashboard of a car, near a heater, or in any other 
location that is subject to very high temperatures. Do not leave your watch where it 
will be exposed to very low temperatures. Temperature extremes can cause your 
watch to lose or gain time, to stop, or otherwise malfunction.
•
 Leaving your watch in an area hotter than +60°C (140°F) for long periods can lead 
to problems with its LCD. The LCD may become difficult to read at temperatures 
lower than 0°C (32°F) and greater than +40°C (104°F).
Impact
•
 Your watch is designed to withstand impact incurred during normal daily use and 
during light activity such as playing catch, tennis, etc. Dropping your watch or 
otherwise subjecting it to strong impact, however, can lead to malfunction. Note that 
watches with shock-resistant designs (G-SHOCK, BABY-G, G-MS) can be worn 
while operating a chain saw or engaging in other activities that generate strong 
vibration, or while engaging in strenuous sports activities (motocross, etc.)
E-55
Band
•
 Tightening the band too tightly can cause you to sweat and make it difficult for air to 
pass under the band, which can lead to skin irritation. Do not fasten the band too 
tightly. There should be enough room between the band and your wrist so you can 
insert your finger.
•
 Deterioration, rust, and other conditions can cause the band to break or come off of 
your watch, which in turn can cause band pins to fly out of position or to fall out. This 
creates the risk of your watch falling from your wrist and becoming lost, and also 
creates the risk of personal injury. Always take good care of your band and keep it 
clean.
•
 Immediately stop using a band if you even notice any of the following: loss of band 
flexibility, band cracks, band discoloration, band looseness, band connecting pin 
flying or falling out, or any other abnormality. Take your watch to your original retailer 
or to a CASIO service center for inspection and repair (for which you will be charged) 
or to have the band replaced (for which you will be charged).
E-54
•
 A trained technician will inspect your watch for proper water resistance whenever 
you have its battery replaced. Battery replacement requires the use of special tools. 
Always request battery replacement from your original retailer or from an authorized 
CASIO service center.
•
 Some water-resistant watches come with fashionable leather bands. Avoid 
swimming, washing, or any other activity that causes direct exposure of a leather 
band to water.
•
 The inside surface of the watch glass may fog when the watch is exposed to a 
sudden drop in temperature. No problem is indicated if the fogging clears up 
relatively quickly. Sudden and extreme temperature changes (such as coming into 
an air conditioned room in the summer and standing close to an air conditioner 
outlet, or leaving a heated room in the winter and allowing your watch to come into 
contact with snow) can cause it to take longer for glass fogging to clear up. If glass 
fogging does not clear up or if you notice moisture inside of the glass, immediately 
stop using your watch and take it to your original retailer or to an authorized CASIO 
service center.
•
 Your water-resistant watch has been tested in accordance with International 
Organization for Standardization regulations.
E-53
•
 Watches that do not have WATER RESIST or WATER RESISTANT marked on the 
back cover are not protected against the effects of sweat. Avoid using such a watch 
under conditions where it will be exposed to large amounts of sweat or moisture, or 
to direct splashing with water.
•
 Even if a watch is water resistant, note the usage precautions described below. 
Such types of use reduce water resistance performance and can cause fogging of 
the glass.
 −
Do not operate the crown or buttons while your watch is submersed in water or 
wet.
 − Avoid wearing your watch while in the bath.
 − Do not wear your watch while in a heated swimming pool, sauna, or any other high 
temperature/high humidity environment.
 − Do not wear your watch while washing your hands or face, while doing housework, 
or while performing any other task that involves soaps or detergents.
•
 After submersion in seawater, use plain water to rinse all salt and dirt from your 
watch.
•
 To maintain water resistance, have the gaskets of your watch replaced periodically 
(about once every two or three years).
E-52
Operating Precautions
Water Resistance
•
 The information below applies to watches with WATER RESIST or WATER 
RESISTANT marked on the back cover.
Water
Resistance 
Under Daily 
Use
Enhanced Water Resistance Under Daily 
Use
5
Atmospheres
10
Atmospheres
20
Atmospheres
Marking
On watch front or on 
back cover
No 
BAR mark
5BAR 10BAR 20BAR
Example of 
Daily Use
Hand washing, rain Yes Yes Yes Yes
Water-related work, swimming
No Yes Yes Yes
Windsurfing No No Yes Yes
Skin diving No No Yes Yes
•
Do not use your watch for scuba diving or other types of diving that requires air tanks.
OPUM-E
E-51
Countdown Timer:
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments)
Other: Auto-repeat timing
World Time:
 48 cities (29 time zones)
Other: Daylight Saving Time/Standard Time; Home City/World Time City 
Swapping
Alarms:
 5 daily alarms (with one snooze alarm); Hourly Time Signal
Illumination:
 LED (light-emitting diode); Auto Light Switch; Selectable illumination 
duration
Battery:
 One lithium battery (Type: CR1220)
Approximate Battery Life: 2 years on type CR1220
(10 seconds of alarm operation per day, one illumination operation (1.5 seconds) 
per day)
Specifications are subject to change without notice.
E-50
Specifications
Accuracy at normal temperature:
 ± 15 seconds a month
Digital Timekeeping:
 Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Standard Time / 
Daylight Saving Time (summer time)
Analog Timekeeping:
 Hour, minutes (hand moves every 20 seconds)
Stopwatch:
Measuring unit: 1/1000 seconds
Measuring capacity: 99:59'59.999"
Measuring accuracy: ±0.0006%
Measuring modes: Elapsed time, Lap time, Split time
Other: Speed








