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MO0804-EA
Operation Guide 4380 4396 5048
About This Manual
Module 4380 Module 4396 Module 5048
• The operational procedures for Modules 4380 , 4396 and 5048 are identical. All of
the illustrations in this manual show Module 4380.
• Button operations are indicated using the letters shown in the illustration.
• For the sake of simplicity, the sample displays in this manual do not show the analog
hands of the watch.
• 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.
• 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.
General Guide
• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press B to illuminate
the face of the watch.
Timekeeping Mode
Press C.
Stopwatch Mode
▲
▲
Recall Mode
Countdown Timer
▲
Mode
Hand Setting Mode
▲
▲
Timekeeping
Day of week
Month – Day
Minutes
Hours
PM indicator
To set the digital time and date
Seconds
3. When the setting you want to change is flashing, use D and B to change it as
described below.
Screen: To do this:
4. Press A to exit the setting screen.
• The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
• Any time the seconds setting is changed, the analog hands are adjusted accordingly.
• See “Daylight Saving Time (DST) Setting” below for details about the DST setting.
To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press D to toggle between 12-hour timekeeping and 24hour timekeeping.
• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and the A (AM) indicator appears to the left
of the hour digits 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 with the Timekeeping Mode time on the
Countdown Timer Mode and Dual Time Mode screens.
Use the Timekeeping Mode to set and view the current
time and date. This watch features separate digital and
analog timekeeping. The procedures for setting the digital
time and analog time are different.
Setting the Digital Time and Date
Use the Timekeeping Mode to set and view a digital
display of the current time and date. When setting the
digital time, you also can configure settings for the
summer time (Daylight Saving Time or DST).
Seconds
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Seconds
Day
Reset the seconds to 00
Toggle between Daylight Saving
Time (ON) and Standard Time (OF)
Change the hour or minutes
Change the year
Change the month or day
DST
Month
Do this:
Press D.
Press D.
Use D (+) and B (–).
Use D (+) and B (–).
Hour
Minutes
Year
Dual Time Mode
▲
Daylight Saving Time (DST) Setting
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.
Alarm Mode
▲
To toggle the Timekeeping Mode digital time between DST and Standard Time
On/Off status
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DST indicator
1. In the Timekeeping Mode, hold down A until the seconds start to flash, which
2. Press C once and the DST setting screen appears.
3. Press D to toggle between Daylight Saving Time (ON displayed) and Standard
4. Press A to exit the setting screen.
• The DST indicator appears on the Timekeeping, Alarm, and Hand Setting Mode
Setting the Analog Time
Perform the procedure below when the time indicated by the analog hands does not
match the time of the digital display.
To adjust the analog time
4. Press A to exit the setting screen.
• The minute hand will be adjusted slightly to match the seconds when you exit the
setting screen.
• To return to the Timekeeping Mode, press C.
On/Off status
Module 4380
indicates the setting screen.
Time (OF displayed).
screens to indicate that Daylight Saving Time is turned on.
• To lock high speed hands movement, hold down D to start it and then press B
to lock. The hands will continue to advance for one 12-hour cycle or until you
press any button to stop it.
• High-speed hand movement will stop automatically after the time advances 12
hours or if an alarm (daily alarm, Hourly Time Signal, or countdown beeper) starts
to sound.
DST indicator
1. In the Timekeeping Mode, press C six times to enter
the Hand Setting Mode.
2. Hold down A until the current digital time starts to
flash, which indicates the setting screen.
3. Use D to adjust the analog setting.
• Press D once to advance the hands 20 seconds.
• Hold down D to advance the hands at high speed.
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On/Off status
Module 4396
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DST indicator
Module 5048
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Stopwatch
Remaining
free records
1/100 secondHours
Minutes Seconds
The stopwatch lets you measure elapsed time, lap times,
split times, and two finishes. Lap times and split times can
be stored in memory.
• The display range of the stopwatch is 99 hours,
59 minutes, 59 seconds.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
Note
• “Lap time” is the time spent to cover a specific segment
of a race, such as one lap around a track. “Split time” is
the time spent from the beginning of a race up to a
certain point.
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Operation Guide 4380 4396 5048
• The stopwatch continues to run, restarting from zero after it reaches its limit, until
you stop it.
• The stopwatch measurement operation continues even if you exit the Stopwatch
Mode.
• For information about how stopwatch times are stored in memory, see “Memory
Management”.
Viewing the Stopwatch Digital Displays
The information that appears in the watch’s upper and lower digital displays depends
on whether you are measuring lap times or split times.
Lap Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time
Split Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time (Split time appears here for eight seconds as it is stored
• See “To measure elapsed time with lap times” and “To measure elapsed time with
split times” for more information about each type of measurement.
• You can perform elapsed time measurement starting from either the lap time screen
or the split time screen. Whenever you enter the Stopwatch Mode, the screen (lap
time or split time) that was displayed when you last exited the mode will appear first.
• During a stopwatch elapsed time operation, the upper display initially shows
minutes, seconds, and a 1/100-second value. This changes to hours, minutes, and
seconds when the time in the upper display exceeds 60 minutes.
• The lower display initially shows hours, minutes, seconds, and a 1/100-second
value. This changes to hours, minutes, and seconds when the time in the lower
display exceeds 10 hours.
To measure elapsed time
Note
• You can perform the following steps starting from either the lap time screen or the
split time screen.
1. Press D to start the stopwatch.
2. Press D again to stop the stopwatch.
• You can resume the measurement operation by pressing D.
3. Press A to clear the stopwatch to all zeros.
To measure elapsed time with lap times
To measure elapsed time with split times
Split Time Recording
(Displayed for eight seconds
after A is pressed.)
Minutes
Hours
Lap time
Elapsed time
Lap time
Lap number
Lap time
Elapsed time
Split number
Split time
in memory.)
Seconds
Minutes
1/100 second Hours
More than one hour
1/100 second
Seconds
More than 10 hours
1. When the stopwatch display shows all zeros, press
A to display the lap time screen (indicated by
LAP).
2. Press D to start an elapsed time measurement.
• At the time, both the upper and lower displays will
show identical times.
3. Press A to record the time of the first lap.
• This freezes the current lap time in the upper part of
the digital display for about eight seconds, while
measurement of total elapsed time and the next lap
time continue internally. The lap number of the
displayed time appears in the lower digital display.
• After eight seconds, the ongoing elapsed time
measurement re-appears in the lower digital display.
4. Repeat step 3 to record more lap times.
5. Press D to stop the stopwatch.
6. Press A to clear the stopwatch to all zeros.
• Lap numbers are incremented automatically starting
from 1 whenever you press A in step 3 of the above
procedure. The maximum lap number is 99. Recording
a lap after that causes the lap number count to restart
from 00.
1. When the stopwatch display shows all zeros, press A
to display the split time screen (indicated by
2. Press D to start an elapsed time measurement.
• At the time, both the upper and lower displays will
show identical times.
3. Press A to record the time of the first split.
• The current split time appears in the lower display for
about eight seconds, as the total elapsed time, next
lap time, and next split time continue to be timed
internally by the watch. The split number of the
displayed time appears in the upper display.
• After eight seconds, the ongoing lap time
measurement appears in the upper display and the
ongoing elapsed time measurement appears in the
lower display.
4. Repeat step 3 to record more split times.
5. Press D to stop the stopwatch.
6. Press A to clear the stopwatch to all zeros.
• Split numbers are incremented automatically starting
from 1 whenever you press A in step 3 of the above
procedure. The maximum split number is 99. Recording
a split time after that causes the split number count to
restart from 00.
Minutes
Seconds
▲
Minutes
Hours
▲
Seconds
/
/SPL).
To time first and second place finishes
1. When the stopwatch display shows all zeros, press A to display the split time
screen (indicated by
2. Press D to start a time measurement.
3. Press A when the first finisher crosses the finish line.
• This freezes the time of the first finisher in the lower part of the digital display for
about eight seconds. After that, the display returns to elapsed time measurement.
4. Press D when the second finisher crosses the finish line.
• The second finisher’s time will appear in the lower display.
• The difference between the first finisher’s and the second finisher’s time will
appear in the upper display.
5. Press A to clear the stopwatch to all zeros.
Memory Management
A new log is created each time you press D in the Stopwatch Mode to start a new
elapsed time measurement operation. A log contains a log title screen, and records of
all the lap or split times you record during the current elapsed time measurement
operation.
• The capacity of the watch’s memory is 60 records.
• If you are adding records to the only log in memory and watch memory becomes
full, adding another record causes the oldest record in the log to be deleted
automatically to make room for the new record.
• If you are adding records to a log when there are multiple logs in memory and watch
memory becomes full, adding another record causes the oldest log in memory and
all of its records to be deleted automatically to make room for new records.
How stopwatch data is stored
The following table shows how stopwatch data is stored when you perform stopwatch
button operations.
Stopwatch Button
Operation
From all-zeros,
press D to start.
Press A to
display lap/split
time.
Press D to stop
elapsed time
measurrement and
then press A to reset.
• See “Recall Mode” for details on how to recall time records from memory.
/SPL).
Data Storage Description
Creates a new log. Stores the date the button was pressed,
and the new log number.
Creates a new record with each button operation. Stores the
lap and split times and total elapsed time at each point the
button is pressed.
Resets the elapsed time to all zeros without recording data.
Recall Mode
Day of week
Month – Day
Log number
Log Title Screen
To recall stopwatch time records
1. In the Stopwatch Mode, check to make sure that the displays reset to all zeros.
• If all zeros are not displayed, reset the stopwatch.
2. Use the A button to select either the lap time screen (to view lap time records) or
the split time screen (to view split time records).
• To convert a lap time saved in the Stopwatch Mode to a split time, select the split
time screen.
3. Press the C button to enter the Recall Mode.
4. Use the A button to scroll through the log title screens from the newest to the
oldest until the title screen of the log whose records you want to view is displayed.
5. Press D to scroll through the records contained in the log you selected in step 4,
from the oldest to the newest.
Log Title Screen
▲
Log number
• Whether you will be able to view lap time records or split time records will depend on
the screen you selected in step 2, above.
To delete a log
1. In the Recall Mode, display the title screen of the log you want to delete.
2. Hold down B and D until CLR stops flashing on the display.
• This deletes the log and all the records inside it.
• Deleting a single log slides all newer logs (ones with higher log numbers) upwards to
fill the empty space. This cause the log numbers of all the newer logs to be reduced
by 1. If there are six logs currently in memory (numbered 01 through 06) and you
delete log 03, the numbers of logs that previously were numbered 04, 05, and 06 will
change to 03, 04, and 05.
Use the Recall Mode to recall and delete logs and records
you stored in the Stopwatch Mode. You can use the Recall
Mode to view both lap and split time records.
• When you enter the Recall Mode, the newest log
recorded in the Stopwatch Mode will appear first. If there
are no logs in memory,
• You can use the Recall Mode to check memory data
even while a stopwatch elapsed time measurement
operation is in progress. However, the time data that is
currently being measured will not appear in the Recall
Mode.
• You can convert a lap time saved in the Stopwatch
Mode to a split time.
Lap time
▲
Press D.
▲
Split time
xxxxxxxx
xxxx appears on the display.
xxxxxxxx
First record Last record
Lap number
▲
▲
Split number
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Operation Guide 4380 4396 5048
DST
Minutes
Hour
Countdown Timer
Timekeeping Mode time
SecondsHours
Minutes
Auto-repeat
on indicator
To use the countdown timer
Press D while in the Countdown Timer Mode to start the countdown timer.
• When the end of the countdown is reached and auto-repeat is turned off, the alarm
sounds for 10 seconds or until you stop it by pressing any button. The countdown
time is reset automatically to its starting value after the alarm stops.
• When auto-repeat is turned on, the countdown will restart automatically without
pausing when it reaches zero. The alarm sounds when the countdown reaches zero.
• The countdown timer measurement operation continues even if you exit the
Countdown Timer Mode.
• Press D while a countdown operation is in progress to pause it. Press D again to
resume the countdown.
• To stop a countdown operation completely, first pause it (by pressing D), and then
press A. This returns the countdown time to its starting value.
To configure countdown start time and auto-repeat settings
Auto-repeat
on indicator
3. Perform the following operations, depending on which setting currently is selected
4. Press A to exit the setting screen.
• The auto-repeat on indicator (
• Frequent use of auto-repeat and the alarm can run down battery power.
On/Off status
on the display.
• While the start time setting is flashing, use D (+) and B (–) to change it.
• Set 0:00 to specify 24 hours.
• While the auto-repeat on/off setting (0N or 0F) is flashing on the display, press
D to toggle auto-repeat on (0N) and off (0F).
screen while this function is turned on.
You can set the countdown timer within a range of one
minute to 24 hours. An alarm sounds when the countdown
reaches zero.
• You also can select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the hour
setting of the countdown start time starts to flash, which
indicates the setting screen.
• If the countdown start time is not displayed, use the
procedure under “To use the countdown timer” to
display it.
2. Press C to move the flashing in the sequence shown
below, and select the setting you want to change.
Start Time
(Hours)
) is displayed on the Countdown Timer Mode
Start Time
(Minutes)
Auto-Repeat
On/Off
Alarms
Alarm date
(Month – Day)
Alarm number
Alarm time
(Hour : Minutes)
Alarm Types
The alarm type is determined by the settings you make, as described below.
• Daily alarm
Set the hour and minutes for the alarm time. This type of setting causes the alarm to
sound everyday at the time you set.
• Date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting causes
the alarm to sound at the specific time, on the specific date you set.
• 1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at time you set, only during the month you set.
• Monthly alarm
Set the day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound every month at the time you set, on the day you set.
To set an alarm time
• You can configure Alarm 1 as a snooze alarm or a one-time alarm. Alarms 2
and 3 can be used as one-time alarms only.
• The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash. This indicates the setting screen.
• This operation turns on the alarm automatically.
3. Press C to move the flashing in the sequence shown below to select other settings.
You can set up to three independent multi-function alarms
with hour, minutes, month, and day. When an alarm is
turned on, the alarm tone sounds when the alarm time is
reached. One of the alarms can be configured as a
snooze alarm or a one-time alarm, while the other two are
one-time alarms.
You also can turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
• There are three alarm screens numbered 1 through 3.
The hourly time signal screen is indicated by :00.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
:00
Hour
Minutes
Month
x3x1 x2
Day
4. While a setting is flashing, use D (+) and B (–) to change it.
• To set an alarm that does not include a month (daily alarm, monthly alarm), set x
for the month. Use D and B until the x mark appears (between 12 and 1) while
month setting is flashing.
• To set an alarm that does not include a day (daily alarm, 1-month alarm), set xx
for the day. Use D and B until the xx mark appears (between the end of the
month and 1) while the day setting is flashing.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (A indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds. In the case of the snooze
alarm, the alarm operation is performed a total of seven times, every five minutes, until
you turn the alarm off or change it to a one-time alarm.
• Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
Note
• Pressing any button stops the alarm tone operation.
• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Displaying the Alarm
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To select the operation of Alarm
1. In the Alarm Mode, use D to select Alarm1.
2. Press A to cycle through the available settings in the sequence shown below.
• The applicable alarm on indicator is displayed in all modes when an alarm is turned
on.
• The snooze indicator flashes during the 5-minute intervals between alarms.
• Displaying the Alarm1 setting screen while the snooze alarm is turned on turns off
the snooze alarm automatically (making Alarm1 a one-time alarm).
1
setting screen
1
Module 4380
Module 4396
Module 5048 Module 5048
One-time alarm on
Module 4380
Module 4396
Snooze alarm on
Alarm off
To turn Alarms 2 and 3 on and off
Alarm on indicator
1. In the Alarm Mode, use D to select a one-time alarm (alarm number 2 or 3).
2. Press A to toggle the displayed alarm on and off.
• Turning on a one-time alarm (2 or 3) displays the alarm on indicator on its screen.
• The alarm on indicator is displayed in all modes.
• If any alarm is on, the alarm on indicator is shown on the display in all modes.
Alarm on indicator
Module 4396Module 4380
Alarm on indicator
Module 5048
To turn the hourly time signal on and off
Hourly time signal on indicator
Module 4380
1. In the Alarm Mode, use D to select the Hourly Time Signal.
2. Press A to toggle the displayed item on and off.
• Turning on the Hourly Time Signal displays the hourly time signal on indicator on its
screen.
• The hourly time signal on indicator is displayed in all modes.
Module 4396
Hourly time signal on indicatorHourly time signal on indicator
Module 5048
Dual Time
Timekeeping Mode time
Dual time
(Hour : Minutes Seconds)
4. When the setting you want to change is flashing, use B and D to change it as
described below.
Screen: To do this:
5. Press A to exit the setting screen.
• The DST indicator on the Dual Time Mode screen indicates that DST is turned on for
the Dual Time Mode time.
The Dual Time Mode lets you keep track of time in a
different time zone. You can select Standard Time or
Daylight Saving Time for the Dual Time.
• The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time
1. Press C to enter the Dual Time Mode.
2. In the Dual Time Mode, hold down A until the DST
setting starts to flash, which indicates the setting screen.
3. Press C to move the flashing in the sequence shown
below to select the other setttings.
Toggle between Daylight Saving
Time (ON) and Standard Time (OF)
Change the hour or minutes
Do this:
Press D.
Use D (+) and B (–).
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Operation Guide 4380 4396 5048
Illumination
This watch has an EL (electro-luminescent) panel that
cause the face of watch to glow for easy reading in the
dark.
• See “Illumination Precautions” for other important
information about using illumination.
To illuminate the face of the watch
In any mode (except when a setting screen is on the
display), press B to illuminate the face of the watch.
• You can use the procedure below to select either
1.5 seconds or 3 seconds as the illumination duration.
When you press B, the illumination will remain on for
about 1.5 seconds or 3 seconds, depending on the
To specify the illumination duration
current illumination duration setting.
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. While the seconds are flashing, press B to toggle the
illumination duration between 1.5 seconds (
seconds (
3. Press A to exit the setting screen.
).
) and 3
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Feature
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch saves any settings you have made up to
that point and exits the setting screen automatically.
• The watch will change to the Timekeeping Mode automatically if you do not perform
any operation in the Recall Mode, Alarm Mode, or Hand Setting Mode for two or
three minutes.
Button Operation Tone
Module 4380 Module 5048Module 4396
The button operation tone sounds any time you press one of the watch’s buttons. You
can turn the button operation tone on or off as desired.
• The multi-function alarms and Countdown Timer Mode alarm will sound even if the
button operation tone is turned off.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the display), hold down C to toggle
the button operation tone on (mute indicator not displayed) and off (mute indicator
displayed).
• Holding down C to turn the button operation tone on or off also causes the watch’s
current mode to change.
• The mute indicator is displayed in all modes when the button operation tone is
turned off.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
• The year can be set in the range of 2000 to 2099.
• The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s batteries replaced.
Illumination Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• Illumination may be hard to see when viewed under direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination runs down the batteries.
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