INSTRUCTION MANUAL
CAL. YK50(R23 SERIES)
NREYK50
6-2003
The display mode changes over in the following
order by pressing button B.
Day of the Week
A
Dual
Time
mode
Alarm
mode
Time/Calendar
mode
Stopwatch
mode
Countdown
Timer
mode
1. Press button B to go to the Time/Calendar
Mode. Mode indicator “T1” appears.
2. Press button A for 3 to 4 seconds to change the
display to the Time/Calendar Setting Mode.
The second digits start flashing.
3. Press button C simultaneously with a time signal
to adjust the second digits. The second digits
are reset to “00” and start immediately.
When button C is pressed while the second
digits are between “30” to “59”, one minute is
added at the same time the second digits are
reset to “00”.
4. Press button B to confirm the second setting and
move on to the hour setting.
5. Adjust the hour digits and other items. Press
button C to adjust an item, and then press button
B to confirm it’s setting and move on to the next
item.
Each press of button C advances the digit by one.
To advance the digits quickly, keep button C
pressed.
• The item to be adjusted changes over in the
following order.
Second
Hour
Date
Minute
Day of the
Week
■ HOW TO SET THE TIME/CALENDAR
6. After all the adjustments are completed, press
button A to go back to the Time/Calendar
Display.
Choice of 12-Hour/24-Hour indication
• The time display format in either 12-hour
indication or in 24-hour indication can be
selected alternatively by pressing button C.
Under the 12-hour indication format, “P” mark
appears in the afternoon, but no AM mark
appears in the morning. Under the 24-hour
indication format, no mark appears on the
display.
Chime setting
The chime can be set to sound on the hour.
Press button D to set the chime. The chime mark
appears on the display.
■ CHARACTERISTICS
1. Time/Calendar Display: Hour, minute,
second, month, date and day of the week
Automatic Calendar: The calendar adjusts
automatically for odd and even months including
February of leap years from 1990 to 2089.
Time Display Format: 12-hour display format
with PM indicator and 24-hour display format are
available.
2. Stopwatch: Measures up to 99 hours 59
minutes 59.99 seconds in 1/100-second
increments for the first 1 hour, and in one-second
increments thereafter. Lap and split time
measurement is also available.
3. Countdown Timer: The timer time can be set
up to 23 hours 59 minutes and 59 seconds in one-
second increments.
4. Dual Time: Time in a different time zone can
be set and displayed.
5. Alarm: The alarm can be set to sound on a 24-
hour basis. Two individual daily alarms that can
be set to the time of Time/Calendar or Dual
Time display.
6. Illuminating light: The built-in
electroluminescent backlight illuminates the
display for viewing in the dark.
■ BUTTONS AND DISPLAYS
PM
indicator
Hour
B
MODE
Month
Minute
Date
START/
LAP
C
D
Alarm
mark
Chime
mark
Second
START/
RESET
A
B
C
Month
PM mark
(for 12-hour
display only)
Chime
Year
Month
Second Hour
Day of the
week
Minute
Date
Chime is ON.
Chime is OFF.
■ HOW TO USE THE STOPWATCH
The stopwatch can measure up to 99 hours 59
minutes and 59. 99 seconds. For the first one hour,
minute, second, and 1/100 second are displayed.
After 1 hour, hour, minute, and second are
displayed. When the measurement is over 99 hours
59 minutes and 59. 99 seconds, the stopwatch stops
automatically.
A
B
C
D
Stopwatch Mode
Indicator
Lap no./
Split no.
Minute
Second
1/100
second
Stopwatch operation
Press button B to go to the Stopwatch Mode. Mode
indicator “CH” appears.
Standard Measurement
1. Press button C to start the stopwatch.
2. Press button D to stop.
3. Press button D to reset the stopwatch.
Start Stop Reset
Lap and Split Time Measurement
1. Press button C to start the stopwatch.
2. Press button C during the measurement to
display the lap and split time.
While the measurement is still in progress
internally, the lap number (LP) and lap time will be
displayed for 4 to 5 seconds, and then the split
number (SP) and split time will be displayed. After
4 to 5 seconds, the display will automatically go back
to the measurement in progress.
Lap number (LP)
Split number (SP)
3. Press button C to take the next lap and split time.
4. Press button D to stop the stopwatch.
5. Press button D to reset.
Start
Display
Lap1/
Split 1
Display
Lap 2/
Split 2
Stop
Reset
* The lap and split time can be measured
repeatedly by pressing button C.
** Up to 9 lap and split times can be
displayed.
■ HOW TO USE THE COUNTDOWN
TIMER
• The Countdown Timer can be set up to 23 hours,
59 minutes and 59 seconds in one-second
increments.
Timer Setting
A
B
C
Countdown Timer
Mode Indicator
Hour
Minute
1. Press button B to go to the Countdown Timer
Mode. Mode indicator “Tr” appears.
2. Press button A for 3 to 4 seconds to change the
display to the Timer Setting Mode. The hour
digits start flashing.
3. Press button C to adjust the hour digits.
Each press of button C advances the digit by one.
To advance the digits quickly, keep button C
pressed.
4. Press button B to confirm the hour setting and
move on to the minute setting.
5. Adjust the minute and second digits in the same
way as Step 3 & 4. Press button C to adjust the
digits, and press button B to confirm the setting
and move on to the next digits.
• The item to be adjusted is shown in the following
order with each press of button B.
Second
6. After all the adjustments are completed, press
button A to go back to the Countdown Timer
Mode.
7. Press button B to go back to the Time/Calendar
Display.
Timer Operation
✼✼ Warning sound
beeps for 10 seconds
Time Up
Start Stop Restart
✼
1. Press button C to start the Timer.
2. Press button D to stop the Timer.
3. Press button C to restart. In order to display
the preset time again, press button A.
✼ The watch will beep for 1 second at 5minutes,
3 minutes, and 1 minute before the timer time is
up. Press any button to stop the sound manually.
✼✼ When the timer time is up, the warning sound
beeps for 9 to 10 seconds, and automatically
reset. Press any button to stop the warning
sound manually.
SET/
LIGHT
Lap time
Split time
Hour Minute Second
B
B
BB
B
B B
B
BB
B
B
C D D
C C C D
D
B B
B
C D C
Join the conversation about this product
Here you can share what you think about the Lorus YK50 Movement. If you have a question, first carefully read the manual. Requesting a manual can be done by using our contact form.