Casio 2860 User Manual
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MO0312-EA

Operation Guide 2858 2859 2860 2861

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright light.

Be sure to read “Battery” of this manual for important

information you need to know when exposing the watch to bright light.

If the display of the watch is blank...

Sleep indicator

If the sleep indicator (SLEEP ) is displayed, it means the

watch’s Power Saving function has turned off the display

 

 

to conserve power. Power Saving automatically turns off

 

the display and enters a sleep state whenever the watch

 

is left for a certain period where it is dark.

 

The initial factory default setting is Power Saving on.

 

The watch recovers from the sleep state if you move it to

 

a well-litarea* , if you press any button, or if you angle

Module 2858/2859

the watch towards your face for reading.

* It can take up to two seconds for the display to turn on.

 

 

See “Power Saving Function” for more information.

Module 2860/2861

General Guide

Press Cto change from mode to mode.

In any mode, press Lto illuminate the display.

World Time Mode

Timekeeping Mode

Press C.

Radio-controlledTimekeeping

This watch receives a time calibration signal and updates its time setting accordingly. The time calibration signal includes both Standard Time and Daylight Saving Time (summer time) data.

In the Timekeeping Mode, press Dto display the Last Signal screen. The Last Signal screen shows the date and time of the last successful time cailbration signal reception.

PM

Day of week

Receive time

indicator

 

 

 

Press D.

 

 

Month – Day Hour : Minutes Seconds

Receive date

 

Current Time Screen

Last Signal Screen

This watch is designed to pick up the time calibration signal transmitted from Rugby, England and the signal from Mainflingen, Germany.

Current Time Setting

This watch automatically adjusts its time setting in accordance with a time calibration signal. You can also perform a manual procedure to set the time and date, when necessary.

The first thing you should do after purchasing this watch is to set your Home City, which is the city where you will normally use the watch. For more information, see “To set your Home City” below.

When using the watch that is outside of the range of the transmitters in Rugby and Mainflingen, you need to manually adjust the time as required. See “Timekeeping” for information about manual settings.

To set your Home City

City code

 

l

l

l

l

l

l

 

 

ll

 

 

 

 

 

 

l

 

l l

l

l l

l

 

 

 

|

| |

|

| |

|

|

 

 

 

 

 

 

 

 

 

 

 

 

 

|

|

 

 

 

 

 

 

|

|

|

|

| | |

|

|

 

 

 

 

 

 

 

 

 

Transmitter mode indicator

1.In the Timekeeping Mode, hold down A until the city code setting starts to flash, which indicates the setting screen.

2.Use D(east) and B(west) to select the city code you want to use as your Home City.

The following are the city codes for major cities in the Western Europe time zones.

LON: London

PAR andBER: Paris, Berlin, Milan, Rome, Amsterdam, Hamburg, Frankfurt, Vienna, Barcelona, Madrid

3.Press Cto display the transmitter mode setting screen.

If the displayed transmitter mode indicator shows something other than qvtA, use Dto displayqvtA before advancing to the next step.

4.Press Atwice to exit the setting screen.

The first press of A displays the 12/24-hoursetting screen. Pressing Aagain exits the setting screen.

About This Manual

The operational procedures for Modules 2858, 2859, 2860, and 2861 are identical. All of the illustrations in this manual show Module 2858/2859.

Button operations are indicated using the letters shown in the illustration.

Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in the “Reference” section.

(Light)

(Light)

Module 2858/2859

Module 2860/2861

Time Recorder Mode

Stopwatch Mode

Alarm Mode

 

 

Important!

Normally, your watch should show the correct time as soon as you select your Home City code. If it does not, it should adjust automatically after the next auto receive operation (in the middle of the night). You can also perform manual receive or you can set the time manually.

If you are in an area that does not use Daylight Saving Time (summer time), turn off the DST setting.

See “Transmitters” for details about the transmitter mode indicator.

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal: auto receive andmanual receive.

Auto Receive

With auto receive, the watch automatically picks up the time calibration signal five times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more information, see “About Auto Receive”.

Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a button. For more information, see “To perform manual receive”.

Important!

Position the watch as shown in the nearby illustration, with its 12 o’clock side facing towards a window. Make sure there are no metal objects nearby.

Resin Band Metal Band

The watch should not be on its side or facing the wrong way.

Proper signal reception can be difficult or even impossible under the conditions listed below.

Inside or

Inside a

Near

Near a

Near high-

Among or

among

vehicle

household

construction

tension

behind

buildings

 

appliances or

site, airport, or

power lines

mountains

 

 

office

other sources

 

 

 

 

equipment,

of electrical

 

 

 

 

or a mobile

noise

 

 

 

 

phone

 

 

 

1

DST indicator

Operation Guide 2858 2859 2860 2861

Signal reception is normally better at night than during the day.

Time calibration signal reception takes from two to five minutes, but in some cases it can take as long as 12 minutes. Take care that you do not perform any button operations or move the watch during this time.

1,500 kilometers

Rugby

 

500 kilometers

Mainflingen

 

This watch is designed to receive the time calibration signal transmitted from Rugby, England and the signal from Mainflingen, Germany. Signal reception is possible within the area represented by a circle with a radius of about 1,500 kilometers.

At distances further than about 500 kilometers from a transmitter, signal reception may not be possible during certain times of year or times of day. Radio interference may also cause problems with reception.

See the information under “Signal Receive Troubleshooting” if you experience problems with time calibration signal reception.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will also perform an additional auto receive operation at 5:00 a.m. if none of the regularly scheduled auto receive operations are successful.

Note

Auto receive is on whenever the transmitter mode setting is anything other than OFF. See “Transmitters” for more information.

The auto receive operation is performed only if the watch is in the Timekeeping Mode or World Time Mode when one of the calibration times is reached. It is not performed if a calibration time is reached while an alarm is sounding, or while you are configuring settings (while settings are flashing on the display).

Auto receipt of the calibration signal is designed to be performed early in the morning, while you sleep (provided that the Timekeeping Mode time is set correctly). Before going to bed for the night, remove the watch from your wrist, and put it in a location where it can easily receive the signal.

When auto receive is turned on, the watch receives the calibration signal for two to five minutes everyday when the time in the Timekeeping Mode reaches each of the calibration times. Do not perform any button operation within five minutes before or after any one of the calibration times. Doing so can interfere with correct calibration.

Remember that reception of the calibration signal depends on the time kept in the digital display. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the displayed time is actually the correct time.

When two, three, four, or five receptions are successful, the watch uses the data of the last reception for calibration. When only one reception is successful, the watch uses the data of the successful reception.

About the Receiving Indicator

The receiving indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest.

Module 2858/2859

Module 2860/2861

Receiving indicator

Strong (Level 4)

(Level 1) Weak

Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the receiving indicator to indicate signal strength.

Use the receiving indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations.

The Level 4 receiving indicator remains on the display in all modes following reception of the time calibration signal and calibration of the watch’s time setting. The Level 4 receiving indicator is not displayed if signal reception was unsuccessful or after manual adjustment of the current time setting.

The Level 4 receiving indicator is displayed only when the watch is able to successfully receive both time and date data. It does not appear when only time data is received.

The Level 4 receiving indicator indicates that at least one of the calibration signal receive operations was successful. Note, however, that the Level 4 receiving indicator is cleared from the display at 3:00 a.m. each day.

To perform manual receive

1.Place the watch on a stable surface so its top (12 o’clock side) is facing towards a window.

Note that signal reception is poor when the 12 o’clock side of the watch is not facing towards a window.

2. In the Timekeeping Mode (Current Time screen), hold down Dfor about two seconds until the watch beeps.

3. Release D and the message RC! appears to indicate that signal reception has started.

Receiving indicator

Time calibration signal reception takes from two to five minutes. Take care that you do not perform any button operations or move the watch during this time.

After signal reception is complete, the display of the watch changes to the Last Signal screen.

Note

To interrupt a receive operation and return to the Timekeeping Mode, press D.

If the receive operation is unsuccessful, the message ERR appears on the display for about one or two minutes. After that, the watch returns to the Timekeeping Mode.

You can also change from the Last Signal or ERR screen to the normal timekeeping screen by pressing D.

Signal Receive Troubleshooting

Check the following points whenever you experience problems with calibration signal reception.

Problem

Probable Cause

What you should do

Cannot perform

The watch is not in the Timekeeping Mode.

Enter the Timekeeping Mode

manual receive.

Your current Home City is not one of the

and try again.

 

following city codes:

SelectLON,PAR, orBER

 

LON, PAR, or BER.

as your Home City.

 

The transmitter mode is incorrect.

Select the transmitter mode

 

 

appropriate for your current

 

 

location.

Auto receive is

The transmitter mode is incorrect.

Select the transmitter mode

turned on, but

You changed the time setting manually.

appropriate for your current

the Level 4

The watch was not in the Timekeeping

location.

receiving

or World Time Mode, or you performed

Perform manual signal receive

indicator does

some button operation during the auto

or wait until the next auto

not appear on

receive operation.

signal receive operation is

the display.

Even if receive is successful, the Level 4

performed.

 

receiving indicator disappears every day

Check to make sure the watch

 

at 3 am.

is in a location where it can

 

Time data (hour, minutes, seconds) only

receive the signal.

 

was received during the last receive

 

 

operation. The Level 4 receiving

 

 

indicator appears only when time data

 

 

and date data (year, month, day) are

 

 

both received.

 

Time setting is

If the time is one hour off, the DST

Change the DST setting to

incorrect

setting may be incorrect.

Auto DST.

following signal

The Home City code setting is not

Select the correct Home City

reception.

correct for the area where you are using

code.

 

the watch.

 

For further information, see “Important!” under “Time Calibration Signal Reception” and “Radio-controlledTimekeeping Precautions”.

World Time

City code

Home city time

Current time in the selected city code

The World Time shows the current time in 30 cities (29 time zones) around the world.

For full information on city codes, see the “City Code Table”.

The current time for all city codes in the World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on the your Home City time setting.

All of the operations in this section are performed in the World Time Mode, which you enter by pressing C.

To view the time in another city code

While in the World Time Mode, press D to scroll through the city codes (time zones) to the east or Bto scroll to the west.

If the current time shown for a city is wrong, check your Timekeeping Mode time and Home City settings and make the necessary changes.

To toggle a city code time between Standard Time and Daylight Saving Time

1. In the World Time Mode, use B and Dto display the city code (time zone) whose Standard Time/Daylight Saving Time setting you want to change.

2. Hold down A to toggle Daylight Saving Time (DST

indicator displayed) and Standard Time (DST indicator

not displayed).

The DST indicator is on the display whenever you

display a city code for which Daylight Saving Time is turned on.

Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected.

Daylight Saving Time (DST) advances the time setting by one hour from Standard Time. Remember that the not all countries or even local areas use Daylight Saving Time.

The watch will perform a signal receive operation even if it is in the World Time Mode when a calibration time is reached. If this happens, the World Time Mode time settings will be adjusted in accordance with the Home City time.

Time Recorder

The Time Recorder lets you store up to 30 records of the current time (month, day, hour, minutes, seconds, and DST on/off setting) with the touch of a button. One way you can use the Time Recorder is to record the start time and the end time of a particular event.

To record a Time Recorder time

1.Enter the Timekeeping Mode.

2.Hold down Bfor about one second to record the Home City time (month, day, hour, minutes, seconds, and DST on/off setting).

The recorded time flashes for about two seconds, and then it is assigned a record number. After that, the Timekeeping Mode screen appears.

Records are assigned numbers sequentially from #01 through#30.

Storing a new time record when there are already 30 records stored in memory automatically deletes record #01, shifts the remaining records upwards by 1, and stores the new record as #30.

To recall Time Recorder times

Time record number

Recorded date (Month – Day)

Recorded time

(Hour : Minutes Seconds)

1.Enter the Time Recorder Mode.

If you recorded a new Time Recorder time since you last entered the Time Recorder Mode, the newest record appears first. If you have not recorded a new time, the record you were viewing when you last exited the Time Recorder Mode appears first.

2.Use B(+) and D(–)to scroll through times stored in memory.

2

Hourly time signal on indicator
Alarm on indicator
Snooze alarm indicator

Operation Guide 2858 2859 2860 2861

To delete all Time Recorder times

1.Enter the Time Recorder Mode.

2.Hold down A for about two seconds to delete all Time Recorder times.

The recorded date and recorded time are replaced by dashes (x) when there are no Time Recorder times currently in memory.

Alarms

Alarm number

Home city time Alarm time (Hour : Minutes)

To set an alarm time

The Alarm Mode gives you a choice of four one-timealarms and one snooze alarm.

Also use the Alarm Mode to turn the Hourly Time Signal (SIG) on and off.

There are five alarms numbered AL1 throughAL4, andSNZ. You can configureSNZ as a snooze alarm only. AlarmsAL1 throughAL4 can be used as onetime alarms only.

Alarm settings (and Hourly Time Signal settings) are

available in the Alarm Mode, which you enter by pressing C.

1.In the Alarm Mode, use Dto scroll through the alarm screens until the one whose time you want to set is displayed.

AL1 AL2AL3

SIG SNZAL4

2.After you select an alarm, hold down A until the hour setting of the alarm time starts to flash, which indicates

the setting screen.

This operation automatically turns on the alarm.

3.Use Cto move the flashing between the hour and minute settings.

4.While a setting is flashing, use D (+) and B(–)to change it.

5. Press A to exit the setting screen.

When setting the alarm time using the 12-hourformat, take care to set the time correctly as a.m. (A indicator) or p.m. (P indicator).

Alarm Operation

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in. In the case of the snooze alarm, the alarm operation is performed a total of seven times, every five minutes, or until you turn the alarm off.

Pressing any button stops the alarm tone operation.

Performing any one of the following operations during a 5-minuteinterval between snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen Displaying the SNZ setting screen

To test the alarm

In the Alarm Mode, hold down Bto sound the alarm.

To turn an alarm on and off

1. In the Alarm Mode, use Dto select an alarm. 2. Press Bto toggle it on and off.

Turning on aone-timealarm (AL1,AL2,AL3,

AL4) displays the alarm on indicator on its Alarm

Mode screen. Turning on the snooze alarm (SNZ)

displays the alarm on indicator and snooze alarm

indicator on its Alarm Mode screen.

In all modes, the alarm on indicator is shown for any alarm that is currently turned on. When the snooze alarm is on, the snooze alarm indicator is displayed in all modes.

The alarm on indicator flashes while the alarm is sounding.

The snooze alarm indicator flashes during the 5-minuteintervals between alarms.

To turn the Hourly Time Signal on and off

1. In the Alarm Mode, use Dto select the Hourly Time Signal (SIG).

2. Press Bto toggle it on (Hourly Time Signal on

indicator displayed) and off (Hourly Time Signal on

indicator not displayed).

The Hourly Time Signal on indicator is displayed in all modes when the Hourly Time Signal is turned on.

Stopwatch

 

 

Hours

Minutes

 

 

Seconds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Home city time 1/100 second

The stopwatch lets you measure elapsed time, split times, and two finishes.

The display range of the stopwatch is 23 hours, 59 minutes, 59.99 seconds.

The stopwatch continues to run, restarting from zero after it reaches its limit, until you stop it.

Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time and returns to elapsed time measurement.

The stopwatch measurement operation continues even if you exit the Stopwatch Mode.

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

To measure times with the stopwatch

 

 

Elapsed Time

 

 

 

 

D

D

D

D

B

Start

Stop

Re-start

Stop

Clear

Split Time

 

 

 

 

D

B

B

D

B

Start

Split

Split release

Stop

Clear

 

(SPL displayed)

 

 

 

Two Finishes

 

 

 

 

D

B

D

B

B

Start

Split

Stop

Split release

Clear

 

First runner

Second runner

Display time of

 

 

finishes.

finishes.

second runner.

 

 

Display time of

 

 

 

 

first runner.

 

 

 

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.

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

In the Timekeeping Mode, press D to display the Last Signal screen.

PM

Day of week

 

indicator

 

 

 

Press D.

 

 

Month – Day

Last Signal Screen

 

Hour : Minutes Seconds

 

Current Time Screen

Setting the 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.

When setting the time and date, you can also configure settings for the transmitter, your Home City code (the code for the city where you normally use the watch), summer time (Daylight Saving time or DST), the 12/24-hourformat, and power saving on/off.

To set the time and date manually

l

l

l

l

l

 

1. In the Timekeeping Mode, hold down A until the city

l

code setting starts to flash, which indicates the setting

 

ll

 

 

 

 

l

l

l

l

l

ll

screen.

 

 

 

2. Use A or Cto move the flashing in the sequence

 

 

 

 

 

 

shown below to select other settings.

 

Press C.

 

 

City/Transmitter

 

C Transmitter

DST

City Code

Mode

Settings

 

 

 

 

 

 

 

 

 

 

Press A.

 

 

 

 

12/24-Hour

C

Hour

Minutes

Time/Date

Format

 

Seconds

 

 

 

 

Settings

Power

 

Day

Month

Year

 

 

 

Saving

 

 

 

 

 

 

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

City/Transmitter Settings

Screen:

To do this:

Do this:

BER

Change the city code

Use D (east) and B(west).

 

 

 

qvtA

Change the transmitter mode (qvtA,

Press D.

DCF, MSF, or OFF)

 

 

 

DST

Toggle between Daylight Saving

Press D.

AUtO

Time (ON) , Standard Time (OFF),

 

or Auto DST (AUtO)

 

 

 

See “City Code Table” for a complete list of available city codes.

The transmitter mode setting is always OFF and cannot be changed whenever the city code setting is anything other thanLON,PAR,BER, orATH.

Time/Date Settings

Screen:

To do this:

Do this:

12H

Toggle between 12-hour(12H) and

Press D.

24-hour(24H) timekeeping

 

 

 

P10:5850

Reset the seconds to 00

Press D.

Change the hour or minutes

Use D (+) and B (–).

'04

Change the year, month, or day

Use D (+) and B (–).

6x30

 

 

PS

Toggle power saving on (ON) and off

Press D.

ON

(OFF)

 

 

 

 

4. Use Ato exit the setting screen.

If a City/Transmitter Setting screen is displayed, press Atwice.

If a Time/Date Setting screen is displayed, press Aonce.

Note

The “Transmitter Mode” setting specifies the time calibration signal transmitter mode, or turns auto receive off. See “Transmitters” for more information.

Auto DST (AUtO) can be selected only whileLON,PAR,BER, orATH is selected as the Home City code. For more information, see “Daylight Saving Time (DST)” below.

3

Operation Guide 2858 2859 2860 2861

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time.

The time calibration signals transmitted from Rugby and Mainflingen include both Standard Time and DST data. When the Auto DST setting is turned on, the watch switches between Standard Time and DST (summer time) automatically in accordance with the received time signal.

The default DST setting is Auto DST (AUtO) whenever you selectLON,PAR,BER, orATH as your Home City code.

If you experience problems receiving the time calibration signal in your area, it is probably best to switch between Standard Time and Daylight Saving Time (summer time) manually.

To change the Daylight Saving Time (summer time) setting

1.In the Timekeeping Mode, hold down Auntil the city code setting starts to flash, which indicates the setting screen.

2.Press Ctwice and the DST setting screen appears.

3.Use D to cycle through the DST settings in the sequence shown below.

Auto DST (AUtO)

 

 

DST off (OFF)

 

 

DST on (ON)

 

 

 

 

 

 

 

 

 

 

 

4. When the setting you want is selected, press Atwice to exit the setting screen.

Backlight

The backlight uses an EL (electro-luminescent)panel thatAuto light switch on indicator causes the entire display to glow for easy reading in the

dark. The watch’s auto light switch automatically turns on the backlight when you angle the watch towards your face

in the dark.

The auto light switch must be turned on (indicated by

the auto light switch on indicator) for it to operate.

See “Backlight Precautions” for other important information about using the backlight.

To turn on the backlight manually

In any mode, press Lto illuminate the display for about one second.

The above operation turns on the backlight regardless of the current auto light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about one second, whenever you position your wrist as described below in any mode. Note that this watch features a “Full Auto EL Light,” so the auto light switch operates only when available light is below a certain level. It does not turn on the backlight under bright light.

Moving the watch to a position that is parallel to the ground and then tilting it towards you more than 40 degrees causes the backlight to turn on.

Parallel to

 

ground

More than

 

40°

Warning!

Always make sure you are in a safe place whenever you are reading the display of the watch using the auto light switch. Be especially careful when running or engaged in any other activity that can result in accident or injury. Also take care that sudden illumination by the auto light switch does not surprise or distract others around you.

When you are wearing the watch, make sure that its auto light switch is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto light switch can create a distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off

In any mode, hold down L for about two seconds to toggle the auto light switch on (auto light switch on indicator displayed) or off (auto light switch on indicator not displayed).

The auto light switch on indicator is on the display in all modes while the auto light switch is turned on.

Battery

This watch is equipped with a solar cell and a rechargeable battery (secondary battery) that is charged by the electrical power produced by the solar cell. The illustration shown below shows how you should position the watch for charging.

Example: Orient the watch so its face

 

is pointing at a light source.

Solar cell

The illustration shows how to position

 

a watch with a resin band.

 

Note that charging efficiency drops

 

when any part of the solar cell is

 

blocked by clothing, etc.

 

Normally, you should try to keep the

 

watch outside of your sleeve as much

 

as possible. Charging is significantly

 

reduced if the face is only partially

 

covered.

 

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 normally exposed to bright light whenever possible.

This watch employs a solar cell that converts light into electricity, which charges a built-inrechargeable battery. Normally, the rechargeable battery should not need replacement, but after very long use over a number of years, the rechargeable battery may lose its ability to achieve a full charge. If you experience problems getting the rechargeable battery to a full charge, contact your dealer or CASIO distributor about having the rechargeable battery replaced.

The rechargeable battery should be replaced with a CASIO-specifiedCTL1616 battery only. Other rechargeable batteries can cause damage to 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 4 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.

 

Level

Battery Power Indicator

Function Status

Battery power

1

Module 2858/2859

2860/2861

All functions enabled.

indicator

 

 

 

 

 

2

 

 

All functions enabled.

 

3

 

 

Beeper tone, backlight,

 

 

 

 

calibration signal

 

 

 

 

reception, display, and

 

 

(Charge Soon Alert)

buttons are disabled.

Recover

 

 

indicator

4

 

 

All functions, including

 

 

 

 

 

 

 

timekeeping, are

 

 

 

 

disabled.

The flashing CHARGE 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 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 3 from Level 4. You will not be able to configure any of the other settings until the battery reaches Level 2 after dropping to Level 4.

Display indicators reappear as soon as the battery is charged from Level 4 to Level 3.

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

If you use the backlight or the alarms a number of times during a short period, the recover indicator (RECOVER) appears on the display and the following operations become disabled until battery power recovers.

Backlight Beeper tone

Calibration reception

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

If the recover indicator appears frequently, it probably means that remaining battery power is low. Leave the watch in 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 six 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 is not exposed to light

Internal timekeeping

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

1 backlight operation (1.5 seconds) per day

10 seconds of alarm operation per day

5 times calibration reception per day

Stable operation is promoted by frequent charging.

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