Filter
Top Products
Operation Guide 2548/2821
3
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 automatically reset to its starting value after the alarm stops.
• When the end of the countdown is reached and auto-repeat is turned on, the alarm
sounds, but the countdown starts again automatically whenever 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 completely stop a countdown operation, first pause it (by pressing D), and then
press B. This returns the countdown time to its starting value.
To set up the countdown timer
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 “To use the countdown timer” to display it.
2.Press C to move the flashing in the sequence shown
below to select other settings.
Auto-repeat
Minutes
Hours
3. While a setting is flashing, use D and B to change it as described below.
• Note that Module 2821 does not display an AM indicator (A).
• Pressing B and D at the same time while any setting is flashing automatically
sets the time to AM12:00 and the date to
x-xx. It also clears any text that is input
for the alarm.
5.Press A to exit the setting screen.
• If you input reminder text, the text appears in place of
the alarm number.
• If the reminder text is more than three characters, it will
scroll form right to left.
• If the alarm has a month and/or day setting, the month/
day appears at the bottom of the display, in place of the
Timekeeping Mode time.
4. While a setting is flashing, use D, B, and C to change it as described below.
Snooze alarm indicator
Alarm on indicator
Screen
A
12:00
x-xx
#
To do this:
Change the hour
and minutes
Change the
month and day
Input reminder
text
Do this:
Use D (+) and B (–).
• With the 12-hour format, set the time correctly as a.m.
(A indicator) or p.m. (P indicator).
• To set an alarm that does not include a month and/or
day, set x for each setting.
Use D (+) and B (–) to cycle through characters at the
current cursor location, and C to move the cursor to the
right. See “Inputting Text”.
Screen
0:15
OFF
To do this:
Change the hours or minutes
Toggle auto-repeat on (
ON
) and off (
OFF
)
Do this:
Use D (+) and B (–).
Press D.
• To specify a countdown start time of 24 hours, set
0:00
.
4. Press A to exit the setting screen.
•
The auto-repeat on indicator ( ) appears on the display while this function is turned on.
• Frequent use of auto-repeat and the alarm can run down battery power.
Stopwatch
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.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• 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
Start
Stop Re-start Stop Clear
Start
Split
( displayed)
Split release Stop Clear
Start
Split Stop Split release Clear
Split Time
Two Finishes
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
• The time on the screen may not appear to stop immediately when you press a
button to stop timing or to perform a split operation. Despite this, the time recorded
by your button operation is accurate.
Seconds
1/100 second
Hours
Minutes
Backlight
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
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 L to illuminate the display for about
one second.
• The above operation turns on the backlight regardless of
the current auto light switch setting.
Auto light switch on
indicator
Module 2821
Alarm Operation
All of the graphic area segments start to flash, starting
from the point the Timekeeping Mode time reaches one
hour before an alarm time. This pre-alarm feature lets you
know that an alarm time is about to be reached.
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, until you turn the alarm
off.
• To stop the alarm tone after it starts to sound, press any button.
• The pre-alarm feature works in the Timekeeping Mode only. To stop the pre-alarm
after it starts, press any button. Note, however, that pressing C also changes to the
e-DATA MEMORY Mode.
• If you input reminder text for an alarm, the text appears for one minute on the
Timekeeping Mode screen when the alarm time is reached. You can clear the
reminder text display by pressing A, B, or D, or by exiting the Timekeeping
Mode.
• In the case of the snooze alarm, the reminder text appears on the Timekeeping
Mode screen for the initial alarm operation only.
• 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
SNZ
setting screen
Changing the DST setting of the Home City code in the World Time Mode
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm on and off
1.In the Alarm Mode, use D and B to select an alarm.
2.Press A to toggle it on and off.
• Turning on a alarm (
AL1to AL4, or SNZ) displays
the alarm on indicator (
) on its Alarm Mode screen.
• In all modes, the alarm on indicator is shown for any
alarm that is currently turned on.
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator (
) flashes while the
snooze alarm is sounding and during the
5-minute intervals between alarms.
To turn the Hourly Time Signal on and off
1.In the Alarm Mode, use D and B to select the Hourly
Time Signal (
SIG).
2.Press A to toggle it on (
ON
) and off (
OFF
).
• The Hourly Time Signal on indicator (
) is shown on
the display in all modes while this function is turned on.
Graphic areas
Alarm on indicator
Hourly time signal o
n
indicator
Countdown Timer
You can set the countdown timer within a range of
one minute to 24 hours. An alarm sounds when the
countdown reaches zero.
• You can also select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
• The initial default countdown start time when you
purchase the watch or after you have its battery
replaced is 15 minutes.
• Countdown timer functions are available in the
Countdown Timer Mode, which you can enter using C.
Hours
Minutes
Seconds
Timekeeping Mode time