CASIO 5727 Watch User Guide

CASIO 5727 Watch

Product Information

• Product Name : CASIO Watch (Model: MA2304-A)
• User’s Guide : 5727 EN
• Manufacturer: CASIO

Charging the Watch

The CASIO watch is equipped with a solar cell for charging. To ensure optimal performance and longevity, follow these instructions:

1. When you are not wearing the watch, leave it where its face (solar cell) is exposed to bright light for charging.
2. To maintain stable operation, expose the face of the watch to about a half day of direct sunlight each month to charge it.
3. While wearing the watch, avoid blocking the face (solar cell) from light with your sleeve, as it may reduce charging efficiency.

Low Charge and Dead Battery Conditions

An alert operation is performed when the battery charge goes low. The second hand will jump at two-second intervals to alert you when the charge is low.

Regular Timekeeping

The watch features regular timekeeping with a second hand. The low battery alert function is also available.

Charging Time

The following are approximate charging times based on different exposure levels (brightness):

The charging time to recover from a dead battery depends on the brightness of the light. Here are the approximate times for 1-second hand movement:

Exposure Level (Brightness)| Approximate Charging Time to 1-second Hand Movement
---|---
Outdoor sunlight (50,000 lux)| 2.5 hours
Sunlight through a window (10,000 lux)| 4 hours
Daylight through a window on an overcast day (5,000 lux)| 8 hours
Indoor fluorescent lighting (500 lux)| 110 hours

The approximate time to achieve a full charge is as follows:

Using the Watch

The CASIO watch has various features and operations. Here are some important instructions:

Crown Operations

Some water-resistant models (10BAR, 20BAR) have a screw-in crown. Follow these steps:

1. To perform a crown operation, rotate it towards you to unscrew it. Avoid applying undue force when pulling.
2. The watch loses its water resistance while the crown is unscrewed. After performing a crown operation, fully screw the crown back in.

If your watch has a rotary bezel…

You can rotate the bezel to align its mark with the minute hand. This allows you to track elapsed time since alignment.

To adjust the time setting

When the second hand is at 12 o’clock, pull the Crown out. Rotate the Crown to change the time setting. Push the Crown back in on a time signal to resume timekeeping.

Specifications

Specifications are subject to change without notice.

Operating Precautions

Water Resistance:

Water Resistance Under Daily Use:

• 5 Atmospheres: Suitable for hand washing and rain.
• 10 Atmospheres: Enhanced water resistance for daily use. Suitable for water-related work and swimming.
• 20 Atmospheres: Suitable for windsurfing and various water activities.

Marking:

On watch front or on back cover:

• No BAR mark
• 5BAR
• 10BAR
• 20BAR

Refer to the marking to determine the water resistance level of your specific model.

Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is designed, carefully read and follow the instructions in this manual, especially the information under “Operating Precautions” and “User Maintenance”.

• Your watch may differ somewhat from the one shown in the illustration.

Before Using the Watch for the First Time

• 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.
• After removing the spacer, use the procedures in “Crown Operations” and “To adjust the time setting” to set up the watch for use.

Charging the Watch

• When you are not wearing the watch, leave it where its face (solar cell) is exposed to bright light for charging.
• To help ensure stable operation, expose the face of the watch to about a half day of direct sunlight each month to charge it.
• While wearing the watch, take care so your sleeve does not block its face (solar cell) from light. Charging efficiency may be reduced if the face (solar cell) is blocked from light, even partially.

Warning!

Some light sources and environments can cause the watch to become extremely hot during charging, which creates the risk of burn injury and damage to internal watch components.
Avoid charging the watch under conditions like the ones described below, where the temperatures may exceed 60°C (140°F).

• On the dashboard of a vehicle parked in the sun
• Near incandescent lamps, camera lights, halogen lamps, or other sources of heat
• In locations exposed to direct sunlight for long periods and other hot locations

Low Charge and Dead Battery Conditions
An alert operation is performed when the battery charge goes low.

Low Battery Alert
The second hand will jump at two-second intervals to alert you when the charge is low.

Charging Time
The times below are general guidelines for reference only.

Charging Time to Support Daily Use

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)| 2.5 hours| 25 hours
Sunlight through a window (10,000 lux)| 4 hours| 60 hours
Daylight through a window on an overcast day (5,000 lux)| 8 hours| 110 hours
Indoor fluorescent lighting (500 lux)| 110 hours| –  –  –

Note
Actual charging time depends on environmental conditions.

Quick Start

• Timekeeping will stop if rechargeable battery power drops to zero. However, Quick Start will resume timekeeping after the watch is exposed to light for a little while.
• Though timekeeping will resume virtually immediately, it will stop again if exposure to light is stopped too soon.
• The actual amount of time it takes for timekeeping to resume after exposure to light depends on the brightness of the light.

Using the Watch

Crown Operations

Some water-resistant models (10BAR, 20BAR) 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.

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.

To adjust the time setting

• When the second hand is at 12 o’clock, pull the Crown out.
• Rotate the Crown to change the time setting.
• Push the Crown back in on a time signal to resume timekeeping.

Note
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.

Specifications

• Accuracy at normal temperature: ±20 seconds a month
• Power Supply: Solar cell and one rechargeable battery
• Approximate battery operating time : 4 months Other: Low battery alert
• Specifications are subject to change without notice

Operating Precautions

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

Water Resistance

The information below applies to watches with WATER RESIST or WATER RESISTANT marked on the back cover.

• Do not use your watch for scuba diving or other types of diving that requires air tanks.
• 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).
• 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.

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).

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.

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.)

Magnetism

• The hands of analog and combination (analog-digital) watches are moved by a motor that uses magnetic force. When such a watch is close to a device (audio speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the magnetism can cause timekeeping 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. 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.
• 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.

Leather Band

• 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 the color of the leather band to  transfer to the other items or the color of the other items to transfer to the leather band.Be sure to dry off your watch thoroughly with a soft cloth before storing it and make sure it is not in contact with other items.
• Leaving a leather band where it is exposed to direct sunlight (ultraviolet rays) for long periods or failure to clean dirt from a leather band for long periods can cause it to become discolored.
  CAUTION : Exposing a leather band to rubbing or dirt can cause color transfer and discoloration.

Metal Components

• Failure to clean dirt from metal components can lead to formation of rust, even if components are stainless steel or plated. If metal components exposed to sweat or water, wipe thoroughly with a soft, absorbent cloth and then place the watch in a wellventilated location to dry.
• Use a soft toothbrush or similar tool to scrub the metal with a weak solution of water and a mild neutral detergent, or with soapy water. Next, rinse with water to remove all remaining detergent and then wipe dry with a soft absorbent cloth. When washing metal components, wrap the watch case with kitchen plastic wrap so it does not come into contact with the detergent or soap.

Bacteria and Odor Resistant Band

• The bacteria and odor resistant band protects against odor generated by the formation of bacteria from sweat, which ensures comfort and hygiene. In order to ensure maximum bacteria and odor resistance, keep the band clean. Use an absorbent soft cloth to thoroughly wipe the band clean of dirt, sweat, and moisture. A bacteria and odor resistant band suppresses the formation of organisms and bacteria. It does not protect against rash due to allergic reaction, etc.

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 your watch or its malfunction.

User Maintenance

Caring for Your Watch

Remember that you wear your watch next to your skin, just like a piece of clothing. To ensure your watch performs at the level for which it is designed, keep it clean by frequently wiping with a soft cloth to keep your watch and band free of dirt, sweat, water and other foreign matter.

• Whenever your watch is exposed to sea water or mud, rinse it off with clean fresh water.
• For a metal band or a resin band with metal parts, use a soft toothbrush or similar tool to scrub the band with a weak solution of water and a mild neutral detergent, or with soapy water. Next, rinse with water to remove all remaining detergent and then wipe dry with a soft absorbent cloth. When washing the band, wrap the watch case with kitchen plastic wrap so it does not come into contact with the detergent or soap.
• For a resin band, wash with water and then wipe dry with a soft cloth. Note that sometimes a smudge like pattern may appear on the surface of a resin band. This will not have any effect on your skin or clothing. Wipe with a cloth to remove the smudge pattern.
• Clean water and sweat from a leather band by wiping with a soft cloth.
• Not operating a watch crown, buttons, or rotary bezel could lead to later problems with their operation. Periodically rotate the crown and rotary bezel, and press buttons to maintain proper operation.

Dangers of Poor Watch Care

Rust

• Though the metal steel used for your watch is highly rust-resistant, rust can form if your watch is not cleaned after it becomes dirty.
  • Dirt on your watch can make it impossible for oxygen to come into contact with the metal, which can lead to breakdown of the oxidization layer on the metal surface and the formation of rust.
• Rust can cause sharp areas on metal components and can cause band pins to fly out of position or to fall out. If you ever notice any abnormality immediately stop using your watch and take it to your original retailer or to an authorized CASIO service center.
• Even if the surface of the metal appears clean, sweat and rust in crevasses can soil the sleeves of clothing, cause skin irritation, and even interfere with watch performance.

Premature Wear

• Leaving sweat or water on a resin band or bezel, or storing your watch an area subject to high moisture can lead to premature wear, cuts, and breaks.

Skin Irritation

• Individuals with sensitive skin or in poor physical condition may experience skin irritation when wearing a watch. Such individuals should keep their leather band or resin band particularly clean. Should you ever experience a rash or other skin irritation, immediately remove your watch and contact a skin care professional.

Battery

• The special rechargeable battery used by your watch is not intended to be removed or replaced by you. Use of a rechargeable battery other than the special one specified for your watch can damage your watch.
• The rechargeable (secondary) battery is charged when the solar cell is exposed to light, so it does not require regular replacement as the primary battery requires. Note, however, that long use or operating conditions can cause the capacity or charging efficiency of the rechargeable battery to deteriorate. If you feel that the amount of operation provided by charging is too short, contact your original retailer or CASIO service center

CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan

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