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Operation Guide 3100

MA0

801

-EA

About This Manual

Depending on the model of your watch, display text
appears either as dark figures on a light background or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.

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)

Timekeeping Mode

Stopwatch Mode

Preset Timer Mode

Alarm Mode

World Time Mode

Countdown Timer Mode

Press     .

General Guide

Press 

B

 to change from mode to mode.

In any mode (except when a setting screen is on the display), press 

L

 to illuminate

the display.

To set the time and date

1. In the Timekeeping Mode, hold down 

A

 until the

seconds start to flash, which indicates the setting
screen.

2. Press 

B

 to move the flashing in the sequence shown

below to select other settings.

Seconds

City Code 

Hour

Year

Minutes

Day

DST

Month

3. When the setting you want to change is flashing, use 

D

 and 

C

 to change it as

described below.

Timekeeping

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

Read This Before You Set the Time and Date !

The times displayed in the Timekeeping Mode and World
Time Mode are linked. Because of this, make sure you
select a Home City code before you set the time and date.

PM indicator 

Hour : Minutes : Seconds 

Month – Day 

Day of week 

Screen

        

50

OFF

6-30

To do this:

Reset the seconds to 

00

Toggle between Daylight Saving Time (

ON

)

and Standard Time (

OFF

)

Change the city code

Change the hour or minutes

Change the year

Change the month or day

Do this:

Press 

D

.

Press 

D

.

Use 

D

 (east) and 

C

 (west).

Use 

D

 (+) and 

C

 (–).

For details about city codes, see the “City Code Table”.

See “Daylight Saving Time (DST)” for details about DST setting.

4. Press 

A

 to exit the setting screen.

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.

To toggle the Timekeeping Mode time between DST and Standard Time

1. In the Timekeeping Mode, hold down 

A

 until the

seconds start to flash, which indicates the setting
screen.

2. Press 

B

 to display the DST setting screen.

3. Press 

D

 to toggle between Daylight Saving Time

(

ON

 displayed) and Standard Time (

OFF

 displayed).

4. Press 

A

 to exit the setting screen.

The 

DST

 indicator appears on the display to indicate

that Daylight Saving Time is turned on.

DST indicator 

To toggle between 12-hour and 24-hour timekeeping

In the Timekeeping Mode, press 

D

 to toggle between 12-hour timekeeping and

24-hour timekeeping.

With the 12-hour format, the 

P

 (PM) indicator appears on the display for times in the

range of noon to 11:59 p.m. and the 

A

 (AM) indicator appears 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.

The 

A

 and 

P

 indicators are not displayed when the current time is displayed in other

modes.

Stopwatch

The Stopwatch Mode lets you time a game or event. The
upper display shows non-stop total elapsed time, while
the lower display shows event elapsed time, which can be
paused as required for time outs, half time, etc.

The measurement limit of the upper display (total time)
is 99 minutes 59 seconds.

The measurement limit of the lower display (event time)
is 59 minutes 59 seconds.

A stopwatch measurement operation continues to run
until you stop it. If either time reaches its measurement
limit, it will restart from zero.

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

Starting event timing will cause the display to change to
the Elapsed Time Screen from the initial screen shown
on this page.

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

B

.

Event time minutes, seconds
* The time measurement in this 

display can be paused and 
restarted by pressing     .   

Total time minutes, seconds, 
1/100 second
* Once started, this time 

measurement cannot be 
paused. It shows total time 
since the stopwatch 
measurement operation 
started.  

Elapsed Time Screen

Basic Event Timing Operation

Start

Stop

*

Re-start

Stop

*

Clear

Hold down

* Total time measurement in upper display continues. 

Using the Stopwatch Mode to Time a Sporting Event

You can time a sporting event with the Stopwatch Mode either with or without
presetting the duration of the event. If you do, the watch will beep when the total time
in the upper display reaches the preset event duration.
If the event is interrupted for timeouts or some other reason, press 

D

 to pause and

restart event time measurement in the lower display. Since total time measurement
continues in the upper display, you can calculate the time that play was interrupted
(lost time) by subtracting the time in the lower display from the time in the upper
display.

Current 
Timekeeping Mode time 

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