Casio 5052 Timekeeping, Battery Level Indicator and Charge Indicator, Charging Precautions, Charging Guide, Day of the Week Indicators, ll l l l, l ll

Operation Guide 3311 5052

To check the current battery level

In the Timekeeping Mode, press Conce to display the battery level indicator.

•The battery level indicator shows the battery level either as HI (Level 1) or MID (Level 2).

•If the battery level drops below Level 2 (MID), a charge soon alert (Level 3) is displayed in all modes.

Battery level indicator

or

Battery Level Indicator and Charge Indicator

The battery level indicator shows you the current power level of the rechargeable battery.

Level	Battery Level		Function Status
	Indicator
1			All functions enabled.
2			All functions enabled.
3	ll l l ll		Auto and manual receive,
	l	l	alarm, hourly time signal,
	l
	lll l lll
	l	l
			illumination, and display are
			disabled. Though the hands of
			the watch do not move, time
	(Charge Soon Alert)		continues to be kept internally.
4			All functions, including
			timekeeping, disabled.

• The flashing charge indicator ( C ) at Level 3 tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.

• At Level 4, all functions are disabled and settings return to their initial factory defaults. Functions are enabled once again after the rechargeable battery is charged, but you need to set the time and date, after the battery reaches Level 2 after dropping to Level 4.

• The Home City reverts to TYO (Tokyo), which means that the watch is configured to receive the Japanese time calibration signal, whenever battery power drops to Level 4. If you are using the watch in North America, you will need to configure your Home City code setting whenever battery power recovers after dropping to Level 4.

• Leaving the watch in direct sunlight or some other very strong light source can cause the battery level indicator to temporarily show a reading that is higher than the actual battery level. The correct battery level indicator should appear after a few minutes.

• If you use the light or alarms a number of times during a short period, the recover indicator ( R ) appears on the

display and the following operations become disabled

until battery power recovers.

Illumination

Beeper tone

Coordination between digital and analog timekeeping Recover indicator Time calibration signal reception

After some time, battery power will recover and the recover indicator will disappear, indicating that the above functions are enabled again.

Charging Precautions

Certain charging conditions can cause the watch to become very hot. Avoid leaving the watch in the areas described below whenever charging its rechargeable battery. Also note that allowing the watch to become very hot can cause its liquid crystal display to black out. The appearance of the LCD should become normal again when the watch returns to a lower temperature.

Warning!

Leaving the watch in bright light to charge its rechargeable battery 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

Charging Guide

After a full charge, timekeeping remains enabled for up to about 5 months.

•The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations.

Exposure Level (Brightness)	Approximate Exposure Time
Outdoor Sunlight (50,000 lux)	5 minutes
Sunlight Through a Window (10,000 lux)	24 minutes
Daylight Through a Window on a Cloudy Day	48 minutes
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)	8 hours

•Since these are the specs, we can include all the technical details.

5 months (from full charge to Level 3 when the watch is not exposed to light) under the following conditions:

•1 illumination operation (1.5 seconds) per day

•10 seconds of alarm operation per day

•5 times calibration reception per day

2 years under the following condition:

•Watch left in the sleep state

•Stable operation is promoted by frequent charging.

Recovery Times

The table below shows the amount exposure that is required to take the battery from one level to the next.

Exposure Level	Approximate Exposure Time
(Brightness)
	Level 4		Level 3		Level 2			Level 1
		▲		▲			▲		▲
Outdoor Sunlight (50,000 lux)	1 hour				10 hours			5 hours
Sunlight Through a Window	4 hours				48 hours			22 hours
(10,000 lux)
Daylight Through a Window	8 hours				99 hours			46 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting	76 hours					– – –
(500 lux)

•The above exposure time values are all for reference only. Actual required exposure times depend on lighting conditions.

Timekeeping

Use the Timekeeping Mode to set and view the current time and date. This section also explains how to manually set the current date and time.

•When setting the time, you can also configure settings for the illumination duration, the 12/24-hour format, and power saving on/off.

•All of the operations in this section are performed in the Timekeeping Mode, which you can enter by pressing C.

You can select either Japanese (kanji) or English for the day of the week indicator.

•For more information, see “To set the current digital time and date manually”.

Day of the Week Indicators

Sunday: SU/			Monday: MO/			Tuesday: TU/		Wednesday: WE/ Thursday: TH/
Friday: FR/			Saturday: SA/
Date Screen							Receiving Indicator
Day of week			Day				and Seconds Count
							▲			Receiving indicator
										Seconds
					Press A.
	Or								A
			▲				▲
Day of week							Current Time Screen
						A				Hour : Minutes
										PM indicator
		▲
Press D.			Reception date			2 seconds				Reception Time
	▲
									2 seconds
Last Signal Screen					2 seconds

Setting the Digital Time and Date Manually

Make sure you select your Home City code before you change the current time and date settings. World Time Mode times are all displayed in accordance with the Timekeeping Mode settings. Because of this, World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode.

To set the current digital time and date manually

1. In the Timekeeping Mode, hold down Auntil the

ll l l l

transmitter indicator starts to flash, which indicates the

setting screen.

l

l

• The second hand will move at high speed to the 12

l

l

l

o’clock position, where it will stop.

l

l

l

l l

l ll

2. Use Aor Cto move the flashing in the sequence

shown below to select other settings.

Transmitter indicator

Transmitter/

Press C.

/ Press A.

C

City Settings

Transmitter

City Code

DST

Auto

Receive

A

Time/Date

C

12/24-Hour

Settings

Format

Seconds

Hour

Minutes

Power

Language

Day

Month

Year

Saving

3.Use Cto display the transmitter screen.

•The transmitter indicator that appears indicates whether the currently selected Home City code is one that supports time calibration signal reception.

This indicator:	Means this:
	The currently selected Home City code supports signal reception.

The currently selected Home City code does not support signal reception.

• appears for the trasmitter while NYC, CHI, DEN, LAX, ANC, or HNL is selected as the Home City. In this case, there is not need to select a transmitter.

•You can change the transmitter when HKG, TYO, or SEL is selected as the Home City. For details, see “To configure the transmitter selection mode setting”.

4.Use Cand Ato select the other time and date settings, and change the settings as described above.

5.When the setting you want to change is flashing, use B and/or Dto change it as described below.

4