Module No. 2155
ABOUT THIS MANUAL
• Button operations are indicated using the letters shown
A
L
C
• Pressing B or C changes modes in the sequence noted below.
• In any mode (except for the Alarm Mode), press L to illuminate the display.
in the illustration.
B
GENERAL GUIDE
2155-1
• 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.
Stopwatch Mode
Recall Mode
World Time Mode
Press B.
▲
Press C.
Timekeeping Mode
A
L
▲
C
Press C.
B
▲
TIMEKEEPING
City Code
A
L
C
Hour : Minutes Seconds
PM indicator
Day of week
Month – Day
Setting the Time and Date
A
L
C
Seconds
Day
• See “Daylight Saving Time (DST)” for details on DST On/Off setting.
4. Use C to select the city code setting.
5. Use B and L to scroll through the city codes until the one you want to set as your
Home City.
• Pressing B scrolls forward, while L scrolls back through city codes.
• See “CITY CODE TABLE” for a complete list of available codes.
6. Use C to select the hour, minutes, year, month, and day, and make the settings
you want for each.
• While hour, minutes, year, month, or day is selected (flashing), press B to increase
the setting or L to decrease it.
• When the 12/24-hour setting is selected, press B to toggle between 12-hour (
and 24-hour (
7. Press A to return to the current time screen.
Daylight Saving Time (DST)
Daylight Saving Time automatically 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 your Home City time between DST and Standard Time
A
L
C
24H) timekeeping.
Use the Timekeeping Mode to set and view the current
time and date.
Read This Before Y ou Set the Time and Date !
The digital times displayed in the Timekeeping Mode
and World Time Mode are linked. Because of this, make
sure you select a “Home City” (the city whose time and
B
date you are setting), before you set the time and date.
• When you enter the Timekeeping Mode from another
mode, the Home City code appears first, followed
after a few seconds by the current time.
1.In the Timekeeping Mode, hold down A until the
seconds digits start to flash.
2.While the seconds digits are flashing, press B to reset
the seconds to
B
• Pressing B while the seconds count is in the range of
30 to 59 resets the seconds to
minutes. In the range of 00 to 29, the minutes count is
unchanged.
3.Press C to move the flashing in the sequence shown
below to select other settings.
DST
On/Off
Month Year
1.In the Timekeeping Mode, hold down A until the
seconds digits start to flash.
2. Press C once to move the flashing to the DST On/Off
setting.
B
3.Press B to toggle Daylight Saving Time (
standard time (
4.Press A to return to the current time screen.
• The DST indicator appears on the display to indicate
that daylight saving time is turned on.
.
AA
and adds 1 to the
AA
City Code Hour Minutes
12/24-Hour
Format
dst Aff
).
dst AN
12H)
) and
▲
Alarm Mode
▲
Countdown Alarm Mode
▲
WORLD TIME
City Code
A
L
C
Current time
Current time in
the selected city
Toggling World T ime between DST and Standard Time
DST indicator
A
L
C
The World Time Mode shows the current time in 27
cities (29 time zones) around the world.
• For full information on city codes, see “CITY CODE
TABLE”.
Entering and Exiting the World Time Mode
In the Timekeeping Mode, press B to switch to the
B
World Time Mode.
• In the World Time Mode, press C to return to the
Timekeeping Mode.
Viewing the Time in Another City
In the World Time Mode, press B to scroll forward
through the city codes.
1.In the World Time Mode, display the city code whose
DST/Standard Time setting you want to change.
• You can make separate settings for each city code.
2.Hold down A for about one second to toggle DST
(DST displayed) and standard time (DST not displayed).
• The DST indicator appears on the display to indicate
B
that 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.
STOPWATCH
Measurement time
(Minutes' Seconds"
1/100 second)
LAP indicator
A
L
C
Last time measurement
Measuring Elapsed Time
1. Press B to start the stopwatch.
2. Press A to stop the stopwatch.
• You can resume the measurement operation by pressing B.
3. Press A to clear the stopwatch to all zeros.
Switching between Lap Time and Split Time Measurement
While the stopwatch is cleared (all zeros), press A to toggle between lap time
measurement (LAP displayed) and split time measurement (SPLIT displayed).
Recording Lap Times or Split Times
1. Select either lap time measurement (LAP displayed) or split time measurement
(SPLIT displayed).
2. Press B to start the stopwatch.
3. Press B to record the lap and split time.
4. You can repeat step 3 as many times as you want.
5. Press A to stop the time measurement.
6. Press A to clear the stopwatch to all zeros.
The Stopwatch Mode let you record elapsed time, lap
times, and split times. The range of the stopwatch is 59
minutes, 59.99 seconds. You can also store lap and split
times in memory.
• Stopwatch functions are available in the Stopwatch
Mode, which you can enter using C.
• The current time measurement is shown in the upper
display, while the lower display shows the last time
B
measurement (elapsed time, lap time, or split time).
• You can use lap time measurement to time how long it
takes to complete a specific portion (such as a single
lap) of a race.
• You can use split time measurement to time how long
it takes to get from the start to a specific point in a
race.
▲
2155-2
About Stopwatch Memory
Whenever you perform a stopwatch operation, measured times are automatically
stored into memory along with the lap number. You can store up to 30 lap/split times in
memory. If you perform more than 30 lap/split time operations, the memory will contain
the times for the last 29 laps/splits (as lap/split numbers 1 through 29), and the final
lap and split time (as lap/split 30).
• Both lap time and split time data is stored in memory, regardless of whether you
performed a lap time or split time measurement.
• Data in lap/split memory is cleared whenever you start a new stopwatch operation.
• The final elapsed time or final lap/split time is stored in memory when you press A
to stop the stopwatch.
Recalling Data from Memory
LAP number
LAP time
A
L
C
Split time
1.Use C to enter the Recall Mode.
• The lower part of the display first shows the lap
number and then the corresponding split time in
memory. The upper part of the display shows the
corresponding lap time.
2.Press B to scroll forward through the data items.
B
Deleting the Data from Memory
To delete all data currently in memory, enter the Recall
Mode and then hold down A until the time display
resets to all zeros.
• Data cannot be cleared from memory while a
Stopwatch Mode measurement operation is in
progress.
COUNTDOWN ALARM
Timer 2
A
L
C
Timer 1 (Minutes'
Seconds'' 1/10 second)
Single Countdown
With this countdown, the time of Timer 1 counts down only once. When the end of the
countdown is reached, the alarm sounds for 10 seconds or until you stop it by
pressing any button. The countdown time is automatically reset to its starting value
after the alarm stops.
• T o perform this type of countdown, set Timer 1 to the starting time you want, and set
the Timer 2 time to zero.
Continuous Countdown
This countdown alternates between Timer 1 and Timer 2 up to 10 times. The alarm
sounds when the end of each countdown is reached.
• The continuous countdown operation repeats up to 10 times before stopping.
• Normally, an alarm tone sounds for 10 seconds when the end of the countdown is
reached. If you use continuous countdown with a start time of 10 seconds or less,
the watch beeps once.
Setting a Countdown Time
A
L
C
Minutes Seconds Minutes Seconds
3. While minutes or seconds digits are flashing, press B to increase the setting or L
to decrease it.
4. Press A to return to the countdown alarm display screen.
• Setting a start time for Timer 2 (upper) while zero is set as the Timer 1 (lower) start
time causes the Timer 2 start time you set to appear in the lower (Timer 1) position.
Using the Countdown Timer
Press B while in the Countdown Alarm Mode to start the countdown timer.
• Press B while a countdown operation is in progress to pause it. Press B again to
resume the countdown.
• T o completely stop a countdown operation, first pause it (by pressing B), and then
press A. This returns the countdown time to its starting value.
Two independent countdown timers (Timer 1 and Timer
2) can be set within the range of 1 second to 59
minutes, 59 seconds. When the countdown reaches
zero, an alarm sounds.
• Countdown alarm functions are available in the
B
Countdown Alarm Mode, which you can enter using
C.
Using the Timer
There are two types of countdown operations: single
countdown and continuous countdown.
1.In the Countdown Alarm Mode, hold down A until the
minutes digits of the countdown time of the Timer 1
starts to flash.
• You cannot set a countdown time while it is running.
B
2.Press C to move the flashing in the sequence shown
below to select other settings.
Timer 1 Timer 2
ALARM
You can set the hour and minutes for five separate Daily
Current time
A
L
C
Hour : Minutes
Alarm No.
Alarm on indicator
Setting an Alarm Time
A
L
C
2. After you select an alarm, hold down A until the hour digits of the alarm time start
to flash.
• This operation automatically turns on the alarm.
3. Press C to move the flashing in the sequence shown below to select other
settings.
4. While hour or minutes is flashing, press B to increase the setting or L to
decrease it.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as p.m. (
5. Press A to return to the alarm display screen.
Alarm Operation
The alarm sounds at the preset time for about 20 seconds, or until you stop it by
pressing any button.
To test the alarm
In the Alarm Mode, hold down L to sound the alarm.
Turning an Alarm and the Hourly Time Signal On and Off
Alarm on indicator
A
L
C
Alarm (on)
Hourly time signal (on)
Alarms. When the Daily Alarm is turned on, the alarm
tone sounds at the preset time each day.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
• Alarm functions (and Hourly Time Signal settings) are
B
available in the Alarm Mode, which you can enter
using C.
• An alarm number (
time indicates the alarm screen. The figures :
place of the alarm number and alarm time indicate the
Hourly Time Signal screen.
1.In the Alarm Mode, press B to select the alarm whose
time you want to set.
B
indicator) or a.m. (no indicator).
h
1.In the Alarm Mode, press B to select an alarm or the
Hourly Time Signal.
2.When the alarm or the Hourly Time Signal you want to
is selected, press L to turn it on and off.
• Turning on an alarm causes the alarm indicator (
appear, and the alarm on graphic at the bottom left of
the display to become black.
B
• Turning on the hourly time signal causes the hourly time
signal indicator (
Signal on graphic at the bottom right of the display to
become black.
• The alarm on indicator and the Hourly Time Signal on
indicator are shown on the display in all modes while
these functions are turned on.
• If any alarm is on, the alarm on indicator is shown on
the display when you change to another mode.
/B
:AA
though F) along with an alarm
B
/2 /D
/F /Z
) to appear, and the Hourly Time
in
AA
) to
BACKLIGHT
Auto light switch on indicator
A
L
C
Turning on the Backlight manually
In any mode (except for the Alarm Mode), press L to illuminate the display for about
two seconds.
• 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 two seconds,
whenever you position your wrist as described below in any mode.
• See “Backlight Precautions” for other important information about using the
backlight.
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 light.
The backlight uses an EL (electro-luminescent) panel that
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.
• The auto light switch must be turned on (indicated by
B
the auto light switch on indicator) for it to operate.
Parallel to
ground
More than
40
°