Casio 5351 Charging the Watch, Charging Guide, Charging Times, Power Recovery Mode, Checking the Current Power Level

Operation Guide 5351

E-33 Mode Reference Guide

E-34 To determine the watch’s current mode

E-34 To return to the Timekeeping Mode from any other mode E-35 To select a mode

E-36 Timekeeping

E-37 Configuring Home City Settings

E-37 To confi gure Home City settings

E-40 To switch between standard time and summer time manually

E-42 Configuring Current Time and Day Settings Manually E-42 To change the current time setting manually E-45 To change the current day setting manually

E-49 Checking the Current Time in a Different Time Zone E-50 To view the time in another time zone

E-53 To swap your Home City and World Time City

E-54 Using the Stopwatch

E-55 To enter and exit the Stopwatch Mode E-55 To perform an elapsed time operation E-56 To perform lap time measurement E-57 To recall lap data

E-58 Using the Countdown Timer

E-59 To specify the countdown start time E-60 To perform a countdown timer operation E-60 To stop the alarm

E-61 Using the Alarm

E-62 To change the alarm time setting

E-64 To turn the alarm on or off

E-64 To stop the alarm

E-65 Adjusting Home Positions

E-67 To adjust home positions manually

E-10E-11

E-70	Troubleshooting	Charging the Watch
E-79	Specifications

The face of the watch is a solar panel that generates power from light. The generated power charges a built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed to light.

Charging Guide

Whenever you are not wearing the watch, be sure to leave it in a location where it is exposed to light.

• Best charging performance is achieved by exposing the watch to light that is as strong as possible.

When wearing the watch, make sure that its face is not blocked from light by the sleeve of your clothing.

•The watch may enter a sleep state (page E-20) if its face is blocked by your sleeve even only partially.

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Warning!

Leaving the watch in bright light for charging 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

Important!

•Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps to ensure that power does not run down.

•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 light can cause power to run down. Make sure that the watch is exposed to bright light whenever possible.

Checking the Current Power Level

You can use the procedure below to determine the watch’s current power level. Certain functions will be disabled when the power level is low. If the power level is low, leave the watch in a location where its face (solar panel) is exposed to light.

To check the current power level

1.In the Timekeeping Mode, press B. The x Second Hand will move to HIGH, MID (Middle), or LOW to indicate the power level.

HIGH

MID: Middle



LOW

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2.After about one second, the x Second Hand will then move to the latest time calibration signal receive operation result.

•See “To check the result of the latest receive operation” (page E-30).

3.Press Bto return to regular timekeeping.

•The watch will also return to regular timekeeping if you do not perform any operation for about 10 seconds.

Low Power



Moves at two-second intervals.

Low power conditions are indicated by the movement of the x Second Hand in the Timekeeping Mode.

•If the x Second Hand is moving normally at one-second intervals, power is at Level 1.

•If the x Second Hand is moving at two-second intervals, power is at Level 2, which is quite low. Expose the watch to light as soon as possible so it can charge.

Low Battery Alert (Hand Movement and Function Status)

Level	Hand Movement	Function Status
1	Normal.	All functions enabled
(HIGH, MID)
2	x Second Hand moves at	Beeper and time
		calibration signal
(LOW)	two-second intervals.	reception disabled.
3	x Second Hand stopped.	All functions disabled

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•When power drops to Level 3, all settings (including timekeeping) will be cleared. Recharging the battery will reset all settings to their initial factory defaults.

•When the watch is at Level 3, exposing it to light for a while will cause the x Second Hand to move to the position of second 57. This indicates that charging has started.

Power Recovery Mode

The watch is designed to go into a power recovery mode that stops hand operation temporarily whenever power suddenly drops below a certain level due to continuous signal reception or other operations over a short period. Note that all operations are disabled while the watch is in the power recovery mode.

The hands will move to the correct positions and the watch will resume normal operation after power recovers (in about 15 minutes). Putting the watch in a location where it is exposed to light will help power to recover sooner.

Charging Times

	Daily		Level Change *2
Exposure Level (Brightness)		Level 3		Level 2	Level 1
	Operation *1
Outdoor sunlight (50,000 lux)	8 minutes	3 hours			28 hours
Window sunlight (10,000 lux)	30 minutes	7 hours			107 hours
Window sunlight on cloudy day	48 minutes	10 hours			172 hours
(5,000 lux)
Indoor fluorescent lighting	8 hours	116 hours			– – –
(500 lux)

*1 Approximate exposure required each day to generate power for normal daily operation.

*2 Approximate exposure required to take power up one level.

•The above times are for reference only. Actual times depend on lighting conditions.

•For details about the operating time and daily operating conditions, see the “Power Supply” section of the Specifications (page E-80).

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