Casio GW3500B-1A Operation Manual

MA1002-EA

Operation Guide 5121

Congratulations upon your selection of this CASIO watch.

This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of this, the radio-controlled atomic timekeeping function will not display the correct time for Newfoundland, Canada.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by you or any third party arising through the use of this product or its malfunction.

About This Manual
	Button operations are indicated using the letters A
	through D shown in the illustration.
	Hand Functions
	z Hour Hand
	x Second Hand
	c Minute Hand
	v Left Dial Hand:
	Indicates the current day of the week and current
	mode.

b24-hour Hand:

Indicates the current 24-hour timekeeping hour.

n Right Dial Hands: Indicate a time, in 24-hour format, depending on the current mode.

m Day

This User’s Guide uses numbers shown above to identify watch hands and indicators.

Things to check before using the watch

1.Hold down C at least two seconds to enter the Timekeeping Mode, and then observe the movement of the x Second Hand.

Is the x Second Hand moving smoothly at one-second intervals?

		NO				YES
	Is the x Second Hand moving at			The watch is charged suffi ciently.
	two-second intervals or is it stopped			For details about charging, see
	completely?			“Charging the Watch”.
		YES				NEXT
	Power is low. Charge the watch by placing it			Go to step 2.
	in a location where it is exposed to light. For
	details, see “Charging the Watch”.

2. Check the Home City and the daylight saving time (DST) setting.

Use the procedure under “To confi gure Home City settings” to confi gure your Home City and daylight saving time settings.

Important!

Proper time calibration signal reception and World Time settings depend on correct Home City, time, and date settings in the Timekeeping Mode. Make sure you configure these settings correctly.

3.Set the current time.

•To set the time using a time calibration signal

See “To get ready for a receive operation”.

•To set the time manually

See “Confi guring Current Time and Date Settings Manually”.

The watch is now ready for use.

•For details about the watch’s radio contr olled timekeeping feature, see “Radio Controlled Atomic Timekeeping”.

Charging the Watch

The face of the watch is a solar cell 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

Power Levels
		You can get an idea of the watch’s power level by
		observing 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.
Moves at two-second
intervals.
Level	Hand Movement	Function Status
1	Normal.	All functions enabled

	2	x Second Hand moves at two-second	Beeper, time calibration signal
		intervals.
			reception disabled
		m Day changes to 1 (home position).
	3	x Second Hand stopped.	All functions disabled
		z Hour Hand and c Minute Hand
		stopped at 12 o’clock.

•When power drops to Level 3, all functions will be disabled but the watch will continue to keep time internally for about one week. If you recharge the battery suffi ciently during this period, the analog hands will move automatically to the correct setting and regular timekeeping will resume. After one week, all settings (including timekeeping) will be cleared. Recharging the battery will reset all settings to their initial factory defaults.

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 overuse of the alarm tone 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
			Level 3	Level 2	Level 1
	Exposure Level (Brightness)	Operation
		*1
	Outdoor sunlight (50,000 lux)	8 minutes	2 hours		24 hours
	Window sunlight (10,000 lux)	30 minutes	6 hours		90 hours
	Window sunlight on cloudy day	48 minutes	8 hours		– – –
	(5,000 lux)
	Indoor fluorescent lighting (500 lux)	8 hours	92 hours		– – –

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

*2 Approximate exposure 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 Specifi cations.

Power Saving

Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area where it is dark. The table below shows how watch functions are affected by Power Saving.

• There actually are two sleep state levels: “second hand sleep” and “function sleep”.

	Elapsed Time in Dark	Operation
	60 to 70 minutes (second hand sleep)	x Second Hand only stopped at 12 o’clock, all
		other functions enabled
		• All functions, including analog timekeeping,
	6 or 7 days (function sleep)	disabled

•Internal timekeeping maintained

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

•The watch will not enter a sleep state while it is in the Stopwatch Mode.

To recover from the sleep state

Move the watch to a well-lit area or press any button.

Radio Controlled Atomic Timekeeping

Whenever you are not	When wearing the watch,
wearing the watch, leave	make sure that its face is
it in a location where it is	not blocked from light by the
exposed to light.	sleeve of your clothing.
• Best charging	• The watch may enter a
performance is achieved	sleep state if its face is
by exposing the watch to	blocked by your sleeve
light that is as strong as	even only partially.
possible.

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.

This watch receives a time calibration signal and updates its time setting accordingly. However, when using the watch outside of areas covered by time calibration signals, you will have to adjust the settings manually as required. See “Confi guring Current Time and Date Settings Manually” for more information.

This section explains how the watch updates its time settings when the city code selected as the Home City is in Japan, North America, Europe, or China, and is one that supports time calibration signal reception.

If your Home City code setting is this: The watch can receive the signal from the transmitter located here:

LON, PAR, ATH	Anthorn (England), Mainflingen (Germany)
HKG	Shangqiu City (China)
TYO	Fukushima (Japan), Fukuoka/Saga (Japan)
HNL, ANC, LAX, DEN, CHI, NYC	Fort Collins, Colorado (United States)

Important!

•The areas covered by HNL and ANC are quite far from the calibration signal transmitters, so certain conditions may cause reception problems.

•When HNL or HKG is selected as the Home City, only the time and date are adjusted according to the time calibration signal. You need to switch manually between standard time and daylight saving time (DST) if required. See “To toggle the Home City time between standard time and daylight saving time” for information about how to do this.

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Operation Guide 5121

Approximate Reception Ranges

UK and German Signals

Anthorn

500 kilometers

1,500 kilometers

Mainflingen

The Anthorn signal is receivable within this area.

North American Signal

2,000 miles

(3,000 kilometers)

600 miles

(1,000 kilometers)

Fort Collins

Japanese Signals	Chinese Signal
Fukushima	500 kilometers	Changchun
500 kilometers		Beijing
Fukuoka/Saga		Shangqiu
		Shanghai
		Chengdu
		Hong Kong
1,000 kilometers		1,500 kilometers

•Even when the watch is within range of a transmitter, signal reception may be impossible due to the effects of geographic contours, structures, weather, the time of year, the time of day, radio interference, etc. The signal becomes weaker at distances of approximately 500 kilometers, which means that the influence of the above conditions becomes even greater.

•Signal reception may not be possible at the distances noted below during certain times of the year or day. Radio interference may also cause problems with reception.

−Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)

−Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)

−Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)

−Shangqiu (China) transmitter: 500 kilometers (310 miles)

•As of November 2009, China does not use Daylight Saving Time (DST). If China does go to the Daylight Saving Time system in the future, some functions of this watch may no longer operate correctly.

•Using this watch in a country covered by a time calibration signal that is different from the countries it supports may result in incorrect time indication due to local application of summer time, etc.

To get ready for a receive operation

1. Confirm that the watch is in the Timekeeping Mode. If it isn’t, hold down C at least two seconds to enter the Timekeeping Mode.

2. The antenna of this watch is located on its 12 o’clock side. Position the watch with 12 o’clock facing towards a window as shown in the nearby illustration. Make sure there are no metal objects nearby.

• Signal reception normally is better

		at night.
	12 o’clock	• The receive operation takes from two
		to seven minutes, but in some cases
	or	it can take as long as 14 minutes.
		Take care that you do not perform
		any button operation or move the
		watch during this time.

•Signal reception may be difficult or even impossible under the conditions described below.

Inside or	Inside a	Near	Near a	Near	Among
among	vehicle	household	construction	high-tension	or behind
buildings		appliances,	site, airport,	power lines	mountains
		office	or other
		equipment,	sources of
		or a mobile	electrical
		phone	noise

3.What you should do next depends on whether you are using Auto Receive or Manual Receive.

•Auto Receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive” for details.

•Manual Receive: Perform the operation under “To perform manual receive”.

Auto Receive

•With Auto Receive, the watch performs the receive operation each day automatically up to six times (up to five times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according to the Timekeeping Mode time). When any receive operation is successful, none of the other receive operations for that day

are performed.

•When a calibration time is reached, the watch will perform the receive operation only if it is in the Timekeeping Mode or World Time Mode. The receive operation is not performed if a calibration time is reached while you are configuring settings.

To perform manual receive

1. In the Timekeeping Mode, keep A depressed (for about two seconds) as the x Second Hand goes through the following sequence.

•Moves to YES (or Y for some models) or NO (N) to indicate the last signal reception result, then to READY (R).

2.The x Second Hand indicates the operations the watch is currently performing.

	When the x Second	It means this:
	Hand is pointed here:
	READY (R)	Watch is setting up for reception.
	WORK (W)	Reception is in progress.
	YES (Y)	Reception was completed
		successfully.
	NO (N)	Reception failed for some reason.

•If signal reception is unstable, the x Second Hand may move between WORK (W) and READY (R).

3.The receive operation is complete when the x Second Hand moves to YES (Y) or NO (N) for about five seconds, and then resumes regular timekeeping.

•You can return to the Timekeeping Mode manually by pressing A while the x Second Hand is pointing to

YES (Y) or NO (N).

•When the receive operation is successful, the watch adjusts the time setting accordingly. It does not adjust the setting if the operation failed.

Note

•To interrupt a receive operation and return to the Timekeeping Mode, press any button.

To check the result of the latest receive operation

In the Timekeeping Mode, press A.

•The x Second Hand will move to YES (Y) for five seconds if the latest receive operation was successful, or NO (N) if it was not. After that, regular timekeeping will resume.

•You can return to the Timekeeping Mode manually by pressing A while the x Second Hand is pointing to YES (Y) or NO (N).

Note

•The x Second Hand will indicate NO (N) if you have adjusted the time or date setting manually since the latest receive operation.

Radio-controlled Atomic Timekeeping Precautions

•Strong electrostatic charge can result in the wrong time setting.

•Even if a receive operation is successful, certain conditions can cause the time setting to be off by up to one second.

•The watch is designed to update the date and day of the week automatically for the period January 1, 2000 to December 31, 2099. Updating of the date by signal reception will no longer be performed starting from January 1, 2100.

•If you are in an area where signal reception is not possible, the watch keeps time with the precision noted in “Specifications”.

•The receive operation is disabled under any of the following conditions.

−While power is at Level 2 or lower

−While the watch is in the power recovery mode

−When the watch is in the function sleep state (“Power Saving”)

•A receive operation is cancelled if an alarm sounds while it is being performed.

Mode Reference Guide

Your watch has four “modes”. The mode you should select depends on what you want to do.

To do this:

Enter this mode:

•View the current time in your Home City and in one of 29 other cities around the globe

•View the current date in the Home City

	• Configure Home City and daylight saving time (DST) settings	Timekeeping Mode
	• Perform a time calibration receive operation
	• Configure time and date settings manually
	Use the stopwatch to measure elapsed time	Stopwatch Mode
	• Select one of 29 cities (time zones) around the world and view the
	current time there	World Time Mode
	• Select daylight saving/summer time (DST) or standard time for a
	time zone
	Set an alarm time	Alarm Mode

Selecting a Mode

With this watch, everything starts from the Timekeeping Mode.

To determine the watch’s current mode

Check the position of the v Left Dial Hand as shown under “To select a mode”.

	To return to the Timekeeping Mode from any other
	mode

Except while the watch is performing auto hand home position correction, hold down C at least two seconds until the x Second Hand returns to 12 o’clock.

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