Casio GWM8501 TYO, Level, l l l, ll ll, ll lll, Warning, Screen:, Do this:, Important, Dual Time, ll l l l l, Timekeeping, Approximate, To do this:, (Brightness)

Operation Guide 3155

Important!

•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 rechargeable battery power to run down. Be sure that the watch is exposed to bright light whenever possible.

•This watch uses a special rechargeable battery to store power produced by the solar cell, so regular battery replacement is not required. However, after very long use, the rechargeable battery may lose its ability to achieve a full charge. If you experience problems getting the special rechargeable battery to charge fully, contact your dealer or CASIO distributor about having it replaced.

•Never try to remove or replace the watch’s special battery yourself. Use of the wrong type of battery can damage the watch.

•All data stored in memory is deleted, and the current time and all other settings return to their initial factory defaults whenever battery power drops to Level 5 and when you have the battery replaced.

•Turn on the watch’s Power Saving function and keep it in an area normally exposed to bright light when storing it for long periods. This helps to keep the rechargeable battery from going dead.

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the rechargeable battery’s power.

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		2 hours		26 hours		7 hours
(50,000 lux)
Sunlight Through a Window		6 hours		129 hours		36 hours
(10,000 lux)
Daylight Through a Window	11 hours			263 hours		73 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting	118 hours			- - - - - - - -		- - - - - - - -
(500 lux)

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

Timekeeping

Level

Battery Power Indicator

Function Status

All functions enabled.

l l l l

l l l

Auto and manual receive,

l ll

illumination, and beeper

l l l l

l l l

disabled.

(Charge Soon Alert)

Battery power

Except for timekeeping and

indicator

the C (charge) indicator, all

lc l

functions and display

indicators disabled.

All functions disabled.

Current Time

Day of Seconds

week	Month – Day
PM	Hour : Minutes
indicator	Seconds
B▲	B
	▲
Dual Time
City code	Dual time

Press the B button to toggle the lower display between the day of the week and date, and the currently selected World Time city and time (Dual Time).

Use the Timekeeping Mode to set and view the current time and date.

•The flashing LOW indicator 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 5, all functions are disabled and settings return to their initial factory defaults. Once the battery reaches Level 2 after falling to Level 5, reconfigure the current time, date, and other settings.

•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, or China you will need to change the Home City code setting to match your location whenever the battery drops to Level 5.

•Display indicators reappear as soon as the battery is charged from Level 5 to Level 2.

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

•Performing illumination, or beeper operations during a


					short period may cause		(recover) to appear on the
					display. Illumination, alarm, countdown timer alarm, and
					hourly time signal will be disabled until battery power
ll l l l l					recovers.
l			l		After some time, battery power will recover and
l				l	After some time, battery power will recover and
l				l	(recover) will disappear, indicating that the above
l	l l l	l	l		(recover) will disappear, indicating that the above
	l l l	l			functions are enabled again.
					functions are enabled again.
					• If	(recover) appears frequently, it probably means
Recover indicator					that remaining battery power is low. Leave the watch in
Recover indicator					bright light to allow it to charge.
					bright light to allow it to charge.

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 seven 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 (5,000 lux)	48 minutes
Indoor Fluorescent Lighting (500 lux)	8 hours

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

•Watch not exposed to light

•Internal timekeeping

•Display on 18 hours per day, sleep state 6 hours per day

•1 illumination operation(1.5 second) per day

•10 seconds of alarm operation per day

•Measurement of 26 Rally Mode stages per month

•Approximately 4 minutes of signal reception per day

•Stable operation is promoted by frequent exposure to light.

Read This Before You Set the Time and Date!

This watch is preset with a number of city codes, each of which represents the time zone where that city is located. When setting the time, it is important that you first select the correct city code for your Home City (the city where you normally use the watch). If your location is not included in the preset city codes, select the preset city code that is in the same time zone as your location.

•Note that all of the times for the World Time Mode city codes are displayed in accordance with the time and date settings you configure in the Timekeeping Mode.

To set the time and date manually

	ll lll		1. In the Timekeeping Mode hold down Auntil the city
l	ll lll		code starts to flash, which indicates the setting screen.
l		l
l		l
l		l	2. Use Dand Bto select the city code you want.
	ll ll		2. Use Dand Bto select the city code you want.
			• Make sure you select your Home City code before

changing any other setting.

• For full information on city codes, see the “UTC Differential/City Code List”.

3. Press Cto move the flashing in the sequence shown below to select the other setting.

12/24-Hour

City Code DST Seconds Hour

Format

Power Saving Day Month Year Minutes

• The following steps explain how to configure timekeeping settings only.

4.When the timekeeping setting you want to change is flashing, use Dor B to change it as described below.

Screen:	To do this:			Do this:
	Change the city code			Use D (east) and B
				(west).
	Cycle between Auto DST (AvtA), Daylight			Press D.
	Saving Time (ON) and Standard Time
	(OFF).
	Toggle between 12-hour (		) and 24-	Press D.
	hour (	) timekeeping
	Reset the seconds to			Press D.
	Toggle the display illumination duration			Press B.
	between 1.5 and 3 seconds
	Change the hour and minutes			Use D (+) and B (–).

Change the year, month, or day

Toggle between Power Saving on () and Press D.

off ()

5. Press Ato exit the setting screen.

•Auto DST (AvtA) can be selected only while LIS, LON, MAD, PAR, ROM,

BER, STO, ATH, MOW, TPE, SEL, TYO, HNL, ANC, YVR, LAX, YEA,

DEN, MEX, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home City code. For more information, see “Daylight Saving Time (DST)” below.

•The day of the week is displayed automatically in accordance with the date (year, month, and day) settings.

12-hour and 24-hour timekeeping

•With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for times in the range of noon to 11:59 p.m. and no indicator appears to the left of the hour digits for times in the range of midnight to 11:59 a.m.

•With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without any indicator.

•The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all other modes.