Casio 5275 Users Manual QW

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2015-01-21

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Operation Guide 5275
 Your watch may differ somewhat from the one shown in the illustration.

Solar Charging

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.

Spacer

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

Crown

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.

Click 2
Click 1


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.
Crown

Caution!
To adjust the time setting
When the second hand is at 12 o’clock, pull
the Crown out to Click 2.

Rotate the Crown to change the time setting.

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.

 The case of the watch may become quite hot when charging. Guard against burn
injury after charging.
 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.
Low Battery Alert
The second hand will jump at two-second intervals to alert you when the charge is
low.

Push the Crown back in.

Regular Timekeeping

Low Battery Alert

Low charge

To change the day setting
Note
Pull the Crown out to Click 1.

Rotate the Crown to set the day.

Push the Crown back in.

Charged

 The day setting uses a
31-day month. Make
adjustments for months of
shorter lengths.
 Avoid changing the day
setting between the hours
of 9 p.m. and 1 a.m.
Otherwise, the day may not
change correctly at midnight.

Crown Operations
Some water-resistant models (100 meters, 200 meters)
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

2-second jump

Charging Time
The times below are general guidelines for reference only.
Charging Time to Support Daily Use
Exposure Level (Brightness)

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)

Exposure Level (Brightness)

Start

Elapsed time
Current

8 hours

Charging Time to Recover from Dead Battery
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.

Approximate Charging Time

Outdoor sunlight (50,000 lux)

Approximate
Charging Time to
1-second Hand
Movement

Approximate Time
to Full Charge

Outdoor sunlight (50,000 lux)

6 hours

29 hours

Sunlight through a window (10,000 lux)

21 hours

108 hours

Daylight through a window on an
overcast day (5,000 lux)

33 hours

172 hours

Indoor fluorescent lighting (500 lux)

329 hours

– – –

Specifications
Accuracy: ±20 seconds average per month
Other: Low battery alert
Power Supply: Solar panel and one rechargeable battery
Approximate battery operating time: 8 months

Important!
The watch will continue to run for about eight months after a full charge, even if it is
not exposed to light. For stable operation, however, expose it to light as much as
possible.

Note
Actual charging time depends on environmental conditions.
Over-charge Protection
Charging stops automatically when a full charge is attained. This protects against
over-charging.

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