Casio 5286 User Manual

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Operation Guide 5286 (OC)

About This Manual

Operations are performed using the watch’s crown, and the three buttons
indicated by the letters A, B and C in this manual.

Hand Functions

z Hour Hand
x Second Hand
c Minute Hand



v Hour Hand (24-hour)
b Small Minute Hand
n Small Hour Hand
m Small Hour Hand (24-hour)
, Lower Dial Hand
. Day Indicator

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

Hand and Date Indicator Movement

x The movement of the x Second Hand and c Minute Hand of this watch are coordinated. To change

the

Minute Hand setting, you will need to move the x Second Hand.

x . Day Indicator movement is also coordinated with z Hour Hand movement. To change the . Day

Indicator setting, you will need to move the

E-2

Hour Hand.

Congratulations upon your selection of this CASIO watch.

x Note that the product illustrations in this manual are intended for reference only, and so the actual

product may appear somewhat different than depicted by an illustration.

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.

Crown Operations

ENGLISH

The crown can be pulled out to one of two (click) positions. Never apply undue force when pulling out the
crown.

Important!

x In order to ensure full water resistance and to prevent damage due to impact, make sure that the crown

is normally pushed in fully when using the watch.

x When pulling out the crown, avoid using undue force, which creates the risk of personal injury to your

fi ngers and fi ngernails, and of watch malfunction.

First click Second click

High-speed Movement

When setting a time or when performing home position adjustment (page E-44), you can move the hands
either forward or back at high speed. There are two high-speed levels: HS1 and HS2 (faster than HS1).

E-1

E-3

To start HS1 high-speed movement

While the crown is pulled out, rotate it rapidly three turns away from you (for
forward movement) or towards you (for reverse movement). High-speed
movement will continue even if you release the crown.

To start HS2 high-speed movement

While HS1 high-speed movement is progress, again rotate the crown rapidly
three turns in the same direction as the current HS1 movement (away from you
for forward movement or towards you for reverse movement).

To stop high-speed movement

Rotate the crown in the direction that is opposite that of the current high-speed

Important!

x Leaving the crown pulled out for more than two minutes (approximately 30 minutes in the case of hand

home position adjustment) without performing any operation will automatically cause crown operations
to become disabled. If this happens, press the crown back in, pull it out, and then start the operation
over again.

E-4

3. Set the current time.

x To set the time using a time calibration signal

See “To get ready for a receive operation” (page E-16).

x To set the time manually

See “Confi guring Current Time and Date Settings Manually” (page E-28).

The watch is now ready for use.

x For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic

Timekeeping” (page E-14).

E-6

movement or press any button.

Things to check before using the watch

1. Observe the movement of the x Second Hand.

Is the

Second Hand moving smoothly at one-second intervals?

Is the x Second Hand moving at two-second
intervals or is it stopped completely?

Power is low. Charge the watch by placing it in a
location where it is exposed to light. For details,
see “Charging the Watch” (page E-10).

2. Check the Home City.

Use the procedure under “To confi gure Home City settings” (page E-24) to confi gure your Home City.

Important!

x Proper time calibration signal reception depends on correct Home City, time, and date settings in the

Dual Time Mode. Make sure you confi gure these settings correctly.

NO

YES

The watch is charged. For details about
charging, see “Charging the Watch”
(page E-10).

Go to step 2.

YES

NEXT

Contents

E-2 About This Manual

E-3 Crown Operations

E-5 Things to check before using the watch

E-10 Charging the Watch

E-13 To recover from the sleep state

E-14 Radio Controlled Atomic Timekeeping

E-16 To get ready for a receive operation
E-18 To perform manual receive
E-19 To check the result of the latest receive operation
E-19 To turn auto receive on and off

E-21 Mode Reference Guide

E-23 Timekeeping (Dual Time Mode)

E-24 Confi guring Home City Settings

E-24 To confi gure Home City settings
E-27 To switch between standard time and summer time manually

E-28 Confi guring Current Time and Date Settings Manually

E-28 To change the current time and date setting manually

E-5

E-7

Operation Guide 5286 (OC)

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E-32 Checking the Current Time in a Different Time Zone

E-32 To enter the Dual Time Mode
E-32 To view the time in another time zone
E-34 To swap your Home City and World Time City

E-35 Using the Stopwatch

E-35 To enter the Stopwatch Mode
E-35 To measure elapsed time
E-36 To measure split times

E-37 Auto Start

E-37 To enter the Stopwatch Mode
E-37 To set the Auto Start Time
E-38 To start an Auto Start operation

E-39 Using the Countdown Timer

E-39 To enter the Countdown Timer Mode
E-40 To specify the countdown start time
E-40 To perform a countdown timer operation
E-41 To stop the alarm

E-42 Using the Alarm

E-42 To enter the Alarm Mode
E-42 To change the alarm time setting
E-43 To turn the alarm on or off
E-43 To stop the alarm

E-8

Charging the Watch

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

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.

x On the dashboard of a car parked in direct sunlight
x Too close to an incandescent lamp
x Under direct sunlight

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

x Best charging

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

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

x The watch may enter a sleep

state (page E-13) if its face is
blocked by your sleeve even
only partially.

E-44 Adjusting the Hand and Day Home Positions

E-46 To adjust the hand and day home positions

E-48 Troubleshooting

E-53 Specifi cations

Important!

x 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.

x 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.

Power Levels

You can get an idea of the watch’s power level by observing the movement of
the

Second Hand.

x If the x Second Hand is moving normally at one-second intervals, power is

at Level 1.

x If the x Second Hand is moving at two-second intervals, power is at Level 2,

which is quite low (Low battery alert). Expose the watch to light as soon as



Moves at two-second
intervals.

possible so it can charge.

Level Hand Movement Function Status

1 Normal. All functions enabled

xx Second Hand moves at

2

two-second intervals.

All hands stopped at 12 o’clock.

3

.. Day Indicator between 31 and 1.

Beeper, time calibration signal
reception, countdown timer
operation, and home position
adjustment disabled

All functions disabled

E-9

E-10

x 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, so you will need to confi gure settings again.

x 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 overuse of the alarm
tone over a short period 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

Exposure Level (Brightness)

Outdoor sunlight (50,000 lux) 8 minutes 2 hours 23 hours

Window sunlight (10,000 lux) 30 minutes 6 hours 86 hours

Window sunlight on cloudy day (5,000 lux) 48 minutes 9 hours 139 hours

Indoor fl uorescent lighting (500 lux) 8 hours 94 hours – – –

* 1 Approximate exposure each day to generate power for normal daily operation.
* 2 Approximate exposure to take power up one level.

E-12

Daily

Operation *1

Level Change *2

Level 3 Level 2 Level 1

Radio Controlled Atomic Timekeeping

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” (page E-28) 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:

LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainfl ingen (Germany)

HONG KONG (HKG) Shangqiu City (China)

TOKYO (TYO) Fukushima (Japan), Fukuoka/Saga (Japan)

NEW YORK (NYC), CHICAGO (CHI),
DENVER (DEN), LOS ANGELES (LAX),
ANCHORAGE (ANC), HONOLULU (HNL)

Important!

x The areas covered by HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration

signal transmitters, so certain conditions may cause reception problems.

E-14

The watch can receive the signal from the transmitter
located here:

Fort Collins, Colorado (United States)

E-11

x The above times are for reference only. Actual times depend on lighting conditions.
x For details about the operating time and daily operating conditions, see the “Power Supply” section of

the Specifi cations (page E-54).

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.

Elapsed Time in Dark Operation

Approximately 1 week

To recover from the sleep state

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

Approximate Reception Ranges

UK and German Signals North American Signal

Anthorn

500 kilometers

1,500 kilometers

The Anthorn signal is receivable
within this area.

Japanese Signals Chinese Signal

Fukushima

500 kilometers

Fukuoka/

Saga

x All hands stopped at 12 o’clock
x Internal timekeeping maintained

Mainfl ingen

1,000 kilometers

2,000 miles
(3,000 kilometers)

600 miles
(1,000 kilometers)

Fort Collins

Changchun500 kilometers

1,500 kilometers

Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong

E-13

E-15

Operation Guide 5286 (OC)

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x 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.

− Mainfl ingen (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)

x As of June 2012, 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 for the
China time zones.

x 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. Confi rm that the watch is in the Dual Time Mode. If it isn’t, hold down C at least two seconds to enter

the Dual Time Mode.

2. Place the watch in a location where signal reception is good.

12 o’clock

or

E-16

To perform manual receive

1. Hold down C for at least two seconds to enter the Dual Time Mode (page E-23).

2. Hold down B for at least two seconds.

x The x Second Hand will fi rst indicate the last receive results as either Y (YES) or N (NO), and then

move to RC (R) (Receive in progress) to indicate that signal reception has started.

Y (YES)

N (NO)

E-18

3. The watch’s time setting is adjusted automatically whenever a receive
operation is successful.

Note

x The current time indication may become out of sync by two or three minutes

while a receive operation is in progress. Correct indication will resume after
the receive operation is complete. If you need to produce a correct time



reading immediately, press any button to stop the receive operation.

x If reception fails for some reason, check the surrounding area and eliminate

possible causes for failure and then try again. See “To get ready for a
receive operation” (page E-16).

x Position the watch as shown in the nearby illustration,

with 12 o’clock pointed towards a window. Make sure

there are no metal objects nearby.

x Signal reception normally is better at night.
x The receive operation takes from two to 10 minutes, but

in some cases it can take as long as 20 minutes. Take

care that you do not perform any button operation or

move the watch during this time.

x Signal reception may be diffi cult or even impossible under the conditions described below.

Inside or among
buildings

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

x Auto Receive: Leave the watch over night in the location you selected in step 2.
x Manual Receive: Perform the operation under “To perform manual receive” on page E-18.

Important!

x With Auto Receive, the watch performs the receive operation each day automatically up to six times

(up to fi ve times for the Chinese calibration signal) between the hours of midnight and 5 a.m. When any
receive operation is successful, none of the other receive operations for that day are performed.

x Calibration signal reception is disabled in the following cases.

− While an elapsed time operation is in progress in the Stopwatch Mode

− While a timer operation is in progress

− While Auto Receive is turned off

− While the crown is pulled out

Inside a vehicle Near household

appliances,
offi ce
equipment, or a
mobile phone

Near a
construction
site, airport, or
other sources of
electrical noise

Near high­tension power
lines

Among
or behind
mountains

To check the result of the latest receive operation

Y (YES)

N (NO)

1. Hold down C for at least two seconds to enter the Dual Time Mode (page

E-23).

2. Press B.

x The x Second Hand will move to Y (YES) if the latest receive operation

was successful, or N (NO) if it was not. After about ten seconds, regular
timekeeping will resume.



x You can return to the Dual Time Mode manually by pressing any button

while the

Second Hand is pointing to Y (YES) or N (NO).

Note

x The x Second Hand will indicate N (NO) if you have adjusted the time or

date setting manually since the latest receive operation.

To turn auto receive on and off

Y (YES)

1. Hold down C for at least two seconds to enter the Dual Time Mode (page

E-23).

2. Press B.

Second Hand is pointing to the latest

N (NO)

3. During the 10 seconds that the
receive operation result (see above), pull out the crown to the fi rst click.

x This will cause the x Second Hand to point to either Y (YES) or N (NO),



which indicates the current on/off setting.

x Leaving the crown pulled out for more than two minutes without

performing any operation will automatically cause crown operations to
become disabled. If this happens, press the crown back in, pull it out,
and then start the operation over again.

E-17

E-19

4. Rotate the crown to move the x Second Hand to the setting you want.

x To turn on auto receive, select Y (YES).
x To turn off auto receive, select N (NO).

5. Push the crown back in to return to the Dual Time Mode.

Radio-controlled Atomic Timekeeping Precautions

x Strong electrostatic charge can result in the wrong time setting.
x Even if a receive operation is successful, certain conditions can cause the time setting to be off by up

to one second.

x The watch is designed to update the date and day of the week automatically for the period from

January 1, 2000 to December 31, 2099. Updating of the date by signal reception will no longer be
performed starting from January 1, 2100.

x If you are in an area where signal reception is not possible, the watch keeps time with the precision

noted in “Specifi cations” (page E-53).

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

− While power is at Level 2 or Level 3 (page E-11)

− While the watch is in the power recovery mode (page E-12)

− While the watch is in the sleep state (power saving, page E-13)

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

E-20

Dual Time Mode Stopwatch Mode

Indicates the day of the
week (Su/Mo/Tu/We/Th/
Fr/Sa).

C

Alarm Mode Countdown Timer Mode

Indicates ON or OFF. Indicates TR.

x You can return to the Dual Time Mode from any other mode by holding down C for at least two

seconds.

C

Indicates the 1/20 (0.05)
second count.

C

Mode Reference Guide

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

To do this: Enter this mode: See:

x View the current time and date in your Home City
x Confi gure Home City and summer time (DST) settings
x Receive the time calibration signal automatically
x Manually adjust the time or date setting

x View the current time in one of 29 other cities around the globe
x Perform manual time calibration signal reception
x View reception results
x Turn auto time calibration signal reception on or off
x Confi gure World Time City and summer time settings
x Swap the Home City and World Time City

x Use the stopwatch to measure elapsed time
x Use Auto Start

Use the countdown timer Countdown Timer Mode E-39

Set an alarm time Alarm Mode E-42

Any Mode E-23

Dual Time Mode E-23

Stopwatch Mode E-35

E-21

Timekeeping (Dual Time Mode)

To enter the Dual Time Mode, hold down C at least two seconds.

Hand Functions

z Hour Hand

C

x Second Hand
c Minute Hand
v Hour Hand (24-hour)
b Small Minute Hand: World Time minute hand



n Small Hour Hand: World Time hour hand
m Small Hour Hand (24-hour): World Time 24-hour hand
, Lower Dial Hand: Indicates the current day of the week.
. Day Indicator

x Pressing A causes the x Second Hand to move to the current Home City

for about one second.

x The . Day Indicator will change gradually between approximately 10 p.m.

and 2 a.m. During this period the number indicating the day will not be
centered in the indicator window.

E-22

E-23