Casio AWG101 1A, GW1500A 1AV Reference, Charging Precautions, Charging Guide, Power Saving Function, Button Operation Tone, Auto Return Features, Scrolling, Initial Screens

Operation Guide 4765

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

Level	Battery Level Indicator					Function Status
1						All functions enabled.
2						All functions enabled.
	l			l		Alarm, hourly time signal, illumination and
	l lll
3	l			l		time calibration signal reception disabled.
	l	ll
	(Charge Soon Alert)
	l lll
	l				l
	l
4	l		ll		l	All functions disabled.
	(Charge Soon Alert)
5						All functions, including timekeeping,
						disabled and initialized.

•The flashing Low indicator (L) at Level 3 and the flashing charge indicator (C) at Level 4 tell you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.

•At Level 5, 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 4 (indicated by the flashing charge indicator (C)) from Level 5. You will not be able to configure any of the other settings until the battery reaches Level 3 (no charge indicator) after dropping to Level 5.

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

•The watch’s Home City code setting will change automatically to TYO (Tokyo) whenever the battery drops to Level 5. With this Home City code setting, the watch is configured to receive the time calibration signals of Japan. If you are using the watch in North America or Europe, you will need to change the Home City code setting to match your location whenever the battery drops to Level 5.

•If you use the illumination or alarms a number of times during a short period, the hands of the watch will stop. Battery Level Indicator will show “R” at this time. Also, the following operations will become disabled until battery power recovers.

Illumination Beeper toneTime calibration signal reception

After some time, battery power will recover and the above functions will be 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 7 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)	8 minutes
Sunlight Through a Window (10,000 lux)	30 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.•Display on 18 hours per day, sleep state 6 hours per day•1 illumination operation (1.5 seconds) per day•10 seconds of alarm operation per day•10 minutes of signal reception per day•Stable operation is promoted by frequent exposure to light.

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 5	Level 4	Level 3	Level 2	Level 1
	▲	▲	▲	▲		▲
Outdoor Sunlight (50,000 lux)		2 hours		25 hours	6 hours
Sunlight Through a Window		7 hours		94 hours	22 hours
(10,000 lux)
Daylight Through a Window on		10 hours		152 hours	35 hours
a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting		126 hours		– – –
(500 lux)

•The above exposure time values are all for reference only. Actual required exposure

times depend on lighting conditions.

Reference

This section contains more detailed and technical information about watch operation. It also contains important precautions and notes about the various features and functions of this watch.

Power Saving Function

When turned on, the Power Saving function enters a sleep

Power saving indicator		state automatically whenever the watch is left in an area
		where it is dark for a certain period. The table below
		shows how watch functions are affected by the Power
		Saving function.
Elapsed Time			Displa	Operation
in Dark
60 to 70 minutes	Blank, with Power Saving			All functions enabled, except
	indicator (		) flashing	for the display
6 or 7 days	Blank, with Power Saving			•Beeper tone, illumination, and
	indicator (		) not flashing	display disabled
				•Analog timekeeping stopped
				at 12 o’clock
				•Auto receive disabled

•Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.

•The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when 6:00 AM arrives, however, it will remain in the sleep state.

To recover from the sleep state

Perform any one of the following operations.•Move the watch to a well-lit area.•Press any button.

To turn Power Saving on and off

On/Off status			1. In the Timekeeping Mode, hold down A until the city
			code starts to flash, which indicates the setting screen.
l l l			2. Press Cnine times until the Power Saving on/off
			screen appears.
l	l
l	l		3. Press Dto toggle Power Saving on (PSON) and off
l
ll ll		l	(PSOF).

4. Press Ato exit the setting screen.

• The Power Saving indicator ( ) is on the display in all modes while Power Saving is turned on.

Button Operation Tone

In any mode (except when a setting screen is on the display), hold down Cfor about three seconds to toggle the button operation tone on and off. The button operation tone off indicator () is displayed while the tone is turned off.

•Even if the button operation tone is turned off, the daily alarm and countdown timer alarm continue to sound when required.

Auto Return Features

•If you leave the watch in the Alarm or Hand Setting Mode, or with the Battery Level indicator displayed for two or three minutes without performing any operation, it automatically returns to the Timekeeping Mode.

•If you leave the watch with a flashing setting on the display for two or three minutes without performing any operation, the watch automatically exits the setting screen.

Scrolling

The Band D buttons are used in various modes and setting screens to scroll through data on the display. In most cases, holding down these buttons during a scroll operation scrolls through the data at high speed.

Initial Screens

When you enter the World Time Mode, the data you were viewing when you last exited the mode appears first.

Radio-controlled Atomic Timekeeping Precautions

•Strong electrostatic charge can result in the wrong time being set.

•The time calibration signal bounces off the ionosphere. Because of this, such factors as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible.

•Even if the time calibration signal is received properly, certain conditions can cause the time setting to be off by up to one second.

•The current time setting in accordance with the time calibration signal takes priority over any time settings you make manually.

•The watch is designed to automatically update the date and day of the week for the period January 1, 2000 to December 31, 2099. Setting of the date by the time calibration signal cannot be performed starting from January 1, 2100.

•This watch can receive signals that differentiate between leap years and non-leap years.

•Though this watch is designed to receive both time data (hour, minutes, seconds) and date data (year, month, day), certain signal conditions can limit reception to time data only.

•Normally, the signal reception date shown by the Last Signal screen is the date data included in the received time calibration signal. When only time data is received, however, the Last Signal screen shows the date as kept in the Timekeeping Mode at the time of signal reception.

•If you are in an area where proper time calibration signal reception is impossible, the watch keeps time within ±15 seconds a month at normal temperature.

•If you have problems with proper time calibration signal reception or if the time setting is wrong after signal reception, check your current city code, DST (summer

time), and auto receive settings.

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