Casio LW201-1AV Operation Manual

Casio Watches Operation Manual - LW201-1AV.
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Operation Guide 2898

MA0409-EA

About This Manual

• Button operations are indicated using the letters shown

in the illustration.

• 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.

(Light)

Timekeeping Mode

Alarm Mode

Stopwatch Mode

Dual Time Mode

Press .

General Guide
• Press B to change from mode to mode.

• In any mode, press L to illuminate the display.

Day of week

Seconds

Hour : Minutes

PM indicator

Month – Day 

To change this setting

Seconds

Hour, Minutes, Year, Month,
Day, Day of week

Perform this button operation

Press C to reset to 00.

Press C to increase the setting.
Holding down C changes the setting at high speed.

Timekeeping

Use the Timekeeping Mode to set and view the current
time and date.

To set the time and date
1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting
screen.

2. Press B to move the flashing in the sequence shown

below to select other settings.

Seconds

Hour

Minutes

Year

Month

Day of week

Day

3. When the setting you want to change is flashing, press C to change it as

described below.

• Pressing C while the seconds are in the range of 30 to 59 resets them to 00 and

adds 1 to the minutes. In the range of 00 to 29, the minutes are unchanged.

4. Press A to exit the setting screen.

• 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 battery replaced.

To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press C to toggle between 12-hour timekeeping and
24-hour 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 no 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. The 24

indicator is on the display while 24-hour format is selected.

• The P and 24 indicators are not displayed with the Timekeeping Mode time on the

Alarm Mode and Dual Time Mode screens.

• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all other modes.

Alarm time
(Hour : Minutes)  

Timekeeping Mode time
(Hour : Minutes)  

Mode indicator

Alarm

When the daily alarm is turned on, the alarm tone sounds
when the alarm time is reached.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.

• All of the operations in this section are performed in the

Alarm Mode, which you enter by pressing B.

Alarm Operation
The alarm tone sounds at the preset time for 10 seconds,
regardless of the mode the watch is in.

To set an alarm time

1. In the Alarm Mode, hold down A until the hour setting

starts to flash, which indicates the setting screen.

• This operation automatically turns on the alarm.

2. Press B to move the flashing between the hour and

minutes.

3. While a setting is flashing, use C to increase it.

Holding down C changes the setting at high speed.

• With the 12-hour format, set the time correctly as a.m.

(no indicator) or p.m. (P indicator).

4. Press A to exit the setting screen.

To stop the alarm tone after it starts to sound
Press any button.

To turn the Daily Alarm and Hourly Time Signal on and off

In the Alarm Mode, press C to cycle through the on and
off settings as shown below.

Alarm On Indicator/Hourly Time Signal On Indicator

Daily alarm 
only

Both off

Both on

Hourly Time 
Signal only

• The alarm on (ALM) indicator flashes while the alarm is

sounding.

• The alarm on (ALM) indicator and Hourly Time Signal

on (SIG) indicator are displayed in all modes.

To test the alarm
In the Alarm Mode, hold down C to sound the alarm.

Hourly time signal 
on indicator 

Alarm on indicator 

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 B.

To measure times with the stopwatch

Elapsed time

Start

Stop

Re-start

Stop

Clear

Start

Split
(SPL 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.

Minutes 

1/100 second 

Mode indicator 

Hours 

Seconds 

Timekeeping Mode time 
(Hour : Minutes) 

Mode indicator 

Seconds  

Hour : Minutes  

Dual Time

The Dual Time Mode lets you keep track of time in a different time zone.

• In the Dual Time Mode, the seconds count is synchronized with the seconds count

of the Timekeeping Mode.

To set the Dual Time
1. Press B to enter the Dual Time Mode.
2. Hold down A until the hour setting starts to flash,

which indicates the setting screen.

3. Press B to move the flashing between the hour and

minutes settings.

4. Press C to increase the setting. Holding down C

changes the setting at high speed.

5. Press A to exit the setting screen.

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