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E-40
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two fi nishes.
To enter the Stopwatch Mode
Use
D
to select the Stopwatch Mode as shown on page E-8.
The mode dial hand will move to
STW
.
To perform an elapsed time operation
E
E
E E
A
Start Stop (Restart) (Stop) Reset
To pause at a split time
E
A
A E
A
Start Split
(
SPL
appears in
the lower display.)
Split release Stop Reset
Hours
Seconds
Minutes
1/100 second
Hours
Seconds
Minutes
1/100 second
E-41
To measure two fi nishes
E
A
E A
A
Start Split
First runner fi nishes.
(
SPL
appears in the
lower display.)
Display time of fi rst
runner
Stop
Second runner
nishes.
Split release
Display time of
second runner
Reset
Note
The Stopwatch Mode can indicate elapsed time up to 23 hours, 59 minutes, 59.99 seconds.
The digital meter shows the 1/10 seconds count.
Once started, stopwatch timing continues until you press
E
to stop it, even if you exit the Stopwatch
Mode to another mode and even if timing reaches the stopwatch limit defi ned above.
Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time.
E-42
Using the Countdown Timer
The countdown timer can be confi gured to start at a preset time and sound an alarm when the end of the
countdown is reached.
To enter the Countdown Timer Mode
Use
D
to select the Countdown Timer Mode as shown on page E-8.
The mode dial hand will move to
TMR
and the upper display will show the current countdown time.
To specify the countdown start time
1. Enter the Countdown Timer Mode.
If a countdown is in progress (indicated by the seconds counting
down), press
E
to stop it and then press
A
to reset to the current
countdown start time.
If a countdown is paused, press
A
to reset to the current
countdown start time.
2. Hold down
A
until the minute setting of the current countdown start
time starts to fl ash. This is the setting screen.
3. Use
E
(+) and
B
(–) to change the minute.
To set the starting value of the countdown time to 60 minutes, set
60'00.
4. Press
A
to exit the setting screen.
Countdown time
(Minutes, seconds)
Countdown time
(Minutes, seconds)
E-43
To perform a countdown timer operation
E
E
E E
A
Start Stop (Restart) (Stop) Reset
The digital meter shows the seconds count.
Before starting a countdown timer operation, check to make sure that a countdown operation is not
already in progress (indicated by the seconds counting down). If it is, press
E
to stop it and then
A
to reset to the countdown start time.
An alarm sounds for ten seconds when the end of the countdown is reached. This alarm will sound in
all modes. The countdown time is reset to its starting value automatically after the alarm sounds.
To stop the alarm
Press any button.
E-44
Using the Alarm
You can set fi ve independent daily alarms.
When an alarm is turned on, an alarm will sound for about 10 seconds each day when the time in the
Timekeeping Mode reaches the preset alarm time. This is true even if the watch is not in the Timekeeping
Mode.
One of the daily alarms is a snooze alarm. The snooze alarm will sound every fi ve minutes up to seven
times or until it is turned off.
You can also turn on an Hourly Time Signal, which will cause the watch to beep twice every hour on the
hour.
To enter the Alarm Mode
Use
D
to select the Alarm Mode as shown on page E-8.
The mode dial hand will move to
ALM
, the lower display will show the
currently selected alarm number (
AL1
to
AL4
, or
SNZ
), or the hourly
time signal indicator (
SIG
).
When you enter the Alarm Mode, the data you were viewing when you
last exited the mode appears fi rst.
Alarm number or SIG
Alarm time
(Hour : Minutes)
Alarm number or SIG
Alarm time
(Hour : Minutes)
E-45
To set an alarm time
1. In the Alarm Mode, use
E
to scroll through the alarm screens in the lower display until the one you
want to change is shown.
AL1 AL2 AL3
SIG AL5 AL4
2. Hold down
A
until the hour digits of the alarm setting start to fl ash in the upper display.
This is the setting screen.
3. Press
D
to move the fl ashing between the hour and minute settings.
4. While a setting is fl ashing, use
E
(+) and
B
(–) to change it.
When setting the alarm time using the 12-hour format, take care to
set the time correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press
A
to exit the setting screen.
To test the alarm
In the Alarm Mode, hold down
E
to sound the alarm.
E-46
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use
E
to select an alarm or the Hourly Time
Signal.
2. When the alarm or the Hourly Time Signal you want is selected, press
A
to turn it on
(
on
)
and off
(- -)
.
The alarm on indicator (when any alarm is on), snooze alarm indicator
(when the snooze alarm is on), and the Hourly Time Signal on indicator
(when the Hourly Time Signal is on) are shown on the lower display in
all modes.
To stop the alarm
Press any button.
Note
The snooze alarm sounds up to seven times at intervals of about fi ve minutes.
Performing any one of the operations below during an ongoing snooze alarm (
SNZ
indicator fl ashing)
will cancel the snooze alarm operation (
SNZ
will stop fl ashing).
- If you turn off the snooze alarm
- If you display the snooze alarm setting screen
- If you display the Timekeeping Mode setting screen
Hourly time signal
on indicator
Alarm on indicator
Snooze alarm indicator
Hourly time signal
on indicator
Alarm on indicator
Snooze alarm indicator
E-47
Illumination
The display of the watch is illuminated for easy reading in the dark. The watch’s auto light switch turns on
illumination automatically when you angle the watch towards your face.
The auto light switch must be enabled (page E-49) for it to operate.
To illuminate the display manually
Press
B
in any mode (except when a fl ashing setting screen is
displayed) to illuminate the display.
You can use the procedure below to select either 1.5 seconds or 3
seconds as the illumination duration. When you press
B
, the display
will remain illuminated for about 1.5 seconds or 3 seconds, depending
on the current illumination duration setting.
The above operation illuminates the display regardless of whether the
auto light switch is enabled or disabled.
To change the illumination duration
1. In the Timekeeping Mode, hold down
A
until
ADJ
appears in the lower display.
When you release
A
(after ADJ appears), SET will be fl ashing in the upper display. This is the
setting mode.
2. Use
D
to cycle through the settings on the lower display until the current illumination duration (
LT1
or
LT3
) is shown.
See the sequence in step 2 of the procedure under “To change the current time and date
settings” (page E-15) for information about how to scroll through setting screens.
Operation Guide 5415
6


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  • I replaced both batteries in Pro Trek PRG-280 watch. Watch is running.. second hand moving.. in timekeeping mode when holding in the "adjust" button.. nothing changes. Where day of week should display is showing the word "OPEN". Suggestions on what i need to do/ Submitted on 1-9-2021 at 17:10

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