CASIO AWS90D-2A
Owner's Manual

Operation Guide 2790
Stopwatch
Analog Timekeeping
The analog time of this watch is synchronized with the digital time. The analog time setting is adjusted automatically whenever you change the digital time. Note � After you manually change the digital time setting, the hands of the analog timepiece move clockwise to adjust to the new setting. If the analog time does not match the digital time for any reason, use the procedure described under �To adjust the analog time� to match the analog setting to the digital setting. � Alarms, the Hourly Time Signal, and the display illumination are all disabled while the analog hands are moving. � Whenever you need to manually adjust both the digital and the analog time settings, make sure you adjust the digital setting first. � Depending on how much the hands have to move in order to adjust to the digital time, it may take some time before the analog hands stop moving.
Minutes Seconds

1/100 second Mode indicator

The stopwatch lets you measure elapsed time. � The display range of the stopwatch is 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. � 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

To adjust the analog time
1. In the Timekeeping Mode, press B four times to enter the Hand Setting Mode. 2. Hold down A until the current digital time starts to flash, which indicates the analog setting screen. � Note that you will not be able to change to the setting screen if the analog hands are moving because the watch is automatically adjusting the analog time to match the digital time. If this happens, wait until the hands stop moving. � The hour hand and minute hand of the watch do not move while the setting screen is on the display. 3. Press C to advance the analog time setting by 20 seconds. � Holding down C advances the analog time setting at high speed. � If you need to advance the analog time a long way, press C and L at the same time. This locks the high speed hand movement, so you can release the two buttons. High-speed hand movement continues until you press any button. It will also stop automatically after the time advances 12 hours or if an alarm (daily alarm or Hourly Time Signal) starts to sound. 4. Press A to exit the setting screen. � To return to the Timekeeping Mode, press B.

Dual Time
Dual Time Mode lets you keep track of a time in a different time zone. � In the Dual Time Mode, the seconds count is synchronized with the seconds count of the current digital time.
Hour : Minutes

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.
Seconds Mode indicator

5. Press A to exit the setting screen.

Display Illumination
An LED (light-emitting diode) and a light guide panel illuminate the display for easy reading in the dark. The watch�s auto light switch automatically turns on display illumination when you angle the watch for reading in the dark. � The auto light switch must be turned on (indicated by the auto light switch indicator) for it to operate. � See �Illumination Precautions� for more important information.
Three-second indicator Auto light switch indicator

Alarm
Alarm time (Hour : Minutes)

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. � Alarm setting (and Hourly Time Signal setting) is available in the Alarm Mode, which you enter by pressing B.

Alarm Operation
Mode indicator

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in. � Note that the alarm does not sound while the analog hands are in motion to adjust in accordance with a change made to the digital time setting in the Timekeeping Mode. 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. � With the 12-hour format, set the time correctly as a.m. (A indicator) or p.m. (P indicator). 4. Press A to exit the setting screen.

To illuminate the display
In any mode, press L to turn on illumination. � The above operation turns on illumination regardless of the current auto light switch setting. � You can use the procedure below to select either one second or three seconds as the illumination duration. When you press L, the illumination will remain on for about one second or three seconds, depending on the current illumination duration setting.

To set an alarm time

To specify the illumination duration 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 L to toggle the illumination duration between three seconds (3" displayed) and one second (3" not displayed). 3. Press A to exit the setting screen. � When the three-second setting is selected, the three-second (3") indicator remains on the display in all modes.

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 Alarm on indicator off settings as shown below.
Alarm On Indicator/Hourly Time Signal On Indicator

About the Auto Light Switch
While the auto light switch is enabled, illumination turns on for about one second or three seconds, whenever you position your wrist as described below in any mode. Note that this watch features a �Full Auto Light,� so the auto light switch operates only when available light is below a certain level. Illumination does not turn on under bright light. � Be sure to wear the watch on the outside of your wrist while using the auto light switch. Moving the watch to a position that is parallel to the ground and then tilting it towards you more than 40 degrees causes illumination to turn on.
Parallel to ground More than 40°

Both on

Both off

Daily alarm only

Hourly Time Signal only

Hourly time signal on indicator

� The alarm on ( ) indicator flashes while the alarm is sounding. � The alarm on ( ) indicator and Hourly Time Signal on ( ) indicator are displayed in all modes.

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

Warning! � Always make sure you are in a safe place whenever you are reading the watch using the auto light switch. Be especially careful when running or engaged in any other activity that can result in accident or injury. Also take care that sudden illumination by the auto light switch does not surprise or distract others around you. � When you are wearing the watch, make sure that its auto light switch is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto light switch can create a distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off In the Timekeeping Mode, hold down L for about two seconds to toggle the auto light switch on ( displayed) or off ( not displayed). � The auto light switch is automatically turned off whenever battery power is at Level 3. After battery power recovers to Level 2, you will have to perform the above procedure to turn the auto light switch back on again. � The auto light switch indicator ( ) is on the display in all modes while the auto light switch is turned on.

2