Casio 2790 User Manual

MA0309-EB

Operation Guide 2790

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright light.

•Be sure to read “Battery” for important information you need to know when exposing the watch to bright light.

If the digital display of the watch is blank...

If the Power Saving on indicator (PS) is on the display (either flashing or not flashing), it means that the display is blank because the watch’s Power Saving function has turned off the display to conserve power. Power Saving automatically turns off the display and enters a sleep state whenever your watch is left for a certain period where it is dark. If the watch is kept in the dark for a longer period, the analog hands will also stop moving after a few days.

•The initial factory default setting is Power Saving on.

•The watch recovers from the sleep state if you move it to a well-lit area, if you press any button, or if you angle the watch towards your face for reading.

•See “Power Saving Function” for more information.

About This Manual

• Button operations are indicated using the letters shown in the illustration.

• For the sake of simplicity, the sample displays in this manual do not show the analog hands of the watch.

• 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.

General Guide

•Press B to change from mode to mode.

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

Timekeeping Mode

Alarm Mode

Stopwatch Mode

Dual Time Mode

Hand Setting Mode

Press .

Timekeeping

This watch features both digital and analog timekeeping. Changing the digital time setting causes the analog setting to be adjusted automatically to match the digital time.

•Whenever you need to adjust both the digital and the analog time settings, make sure you adjust the digital setting first.

•In the Timekeeping Mode, press A to toggle the display between the date screen and the time screen.

Date Screen	Time Screen
	Minute hand
	Hour : Minutes
Hour hand	Press .
Month – Day
	PM indicator
Day of week	Seconds
	Seconds

Digital Time and Date

Use the Timekeeping Mode to set and view a digital display of the current time and date. When setting the digital time, you can also specify the illumination duration.

To set the digital time and date

1.In the Timekeeping Mode, hold down A until the seconds start to flash, which indicates the setting screen.

• The hour hand and minute hand of the watch do not move while the setting screen is on the display.

2. Press B to move the flashing in the sequence shown below to select the other settings.

Seconds/Illumination duration

Hour

Minutes

Day

Month

Year

3.When the setting you want to change is flashing, use C and L to change it as described below.

Screen	To do this:	Do this:
36	Reset the seconds to 00	Press C.
	Toggle illumination duration between three seconds	Press L.
	(3" displayed) and one second (3" not displayed)
P10:08	Change the hour or minutes	Press C (+).
2003	Change the year
6-30	Change the month or day

4. Press A to exit the setting screen.

•When you use the above procedure to set the digital display time, the hands of the analog timepiece normally adjust according to your setting.

•For more information about illumination duration, see “Display Illumination”.

•Resetting the seconds to 00 while the current count is in the range of 30 to 59 causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are reset to 00 without changing the minutes.

•The day of the week is automatically displayed in accordance with the date (year, month, and day) settings.

•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 (indicated by A or P on the display), or 24-hour timekeeping.

•With the 12-hour format, the P (PM) indicator appears on the display for times in the range of noon to 11:59 p.m. and the A (AM) indicator appears 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, without any indicator.

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

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Alarm on indicator

Operation Guide 2790

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.

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.

Alarm

Alarm time (Hour : Minutes)

Mode indicator

To set an alarm time

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

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 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

Both on

Both off

Daily alarm

Hourly Time

only

Signal only

Hourly time signal

• The alarm on (

) indicator flashes while the alarm is

on indicator

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.

Stopwatch

	Minutes				Seconds			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
				1/100 second				Stopwatch Mode, which you enter by pressing B.
	Mode		indicator
	To measure times with the stopwatch
	Elapsed time
	Start						Stop	Re-start	Stop	Clear

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.

5. Press A to exit the setting screen.

Seconds Mode indicator

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

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 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.

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°

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.

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