Casio 1815, 1835 Owner's Manual

2. OPERATION CHART: QW-1815/1835

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TR 0

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• Press Cto change from mode to mode.

• In any mode (except when making countdown alarm settings) press Dto illuminate the digital display.

The operational procedures for Module 1815, 1835 and 1826 are identical. All of the illustrations in this manual show Module 1826.

Timekeeping Mode

GENERAL GUIDE

Stopwatch Mode Countdown

Alarm Mode

[Module 1815] [Module 1835]

[Module 1826]

TIMEKEEPING MODE

To set the time and date

Day of

Month

week

Hour

Seconds

Minutes

indicator

• Except for the seconds or 12/24-hour setting, holding down a button changes the setting at high speed.

• When the 12-hour format is selected, the indicator P appears on the display to indicate "P.M." times. There is no indicator for "A.M." times.

5.After you set the time and date, press Ato return to the Timekeeping Mode.

• The day of the week is automatically set in accordance with the date.

• The date can be set within the range of January 1, 1995 to December 31, 2039.

• If you do not operate any button for a few minutes while a setting is flashing, the

flashing stops and the watch goes back to the Timekeeping Mode automatically.

1.Hold down Awhile in the Timekeeping Mode until the

Day

seconds digits flash on the display.

2.Press Cto change the selection (flashing) in the following sequence.

Seconds

Day

3.While the seconds setting is selected (flashing), press

to reset it to 00. If you press Ewhile the seconds setting is in the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the seconds setting is in the range of 00 to 29, the minutes count is unchanged.

4.While any other setting (beside seconds) is selected (flashing), press Eto increase it or Bto decrease it. While the 12/24-hour format setting is selected, press

to toggle it between 12 and 24.

Hour

Month Year

Minutes

12/24-

Hour

Format

ABOUT THE BACKLIGHT

About the Auto Light Switch Function

When the auto light switch function is turned on, the backlight automatically turns on for two seconds under the conditions described below. Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light switch to operate when not needed, which shortens battery life.

Moving the watch to a position that is parallel to the ground and then tilting it towards you approximately 40 degrees causes the backlight to illuminate.

Parallel to ground

40°

Caution

The backlight of this watch employs an electro-luminescent (EL) light, which loses its

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illuminating power after very long term use.

• Frequent use of the backligfht shortens the battery life.

• The watch emits an audible sound whenever the display is illuminated. This is because the

EL light vibrates slightly when lit. It does not indicate malfunction of the watch.

Warning!

Never try to read your watch when mountain climbing or hiking in areas that are dark

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or in areas with poor footing. Doing so is dangerous and can result in serious personal injury.

• Never try to read your watch when running on a roadside or in any other location

where there might be vehicular or pedestrian traffic. Doing so is dangerous and can result in serious personal injury.

• Never try to read your watch when riding on a bicycle or when operating a motorcycle

or any other motor vehicle. Doing so is dangerous and can result in a traffic accident and serious personal injury.

• When you are wearing the watch, make sure that its auto light switch function 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.

About the EL Alarm

While the EL alarm feature is turned on, the watch's EL backlight flashes along with the audible tone when a daily alarm time is reached, when the hourly time signal sounds, or when the end of a countdown alarm operation is reached. Pressing while the EL alarm feature is turned on causes the display to remain illuminated for five seconds, instead of the normal two seconds when the EL alarm is turned off.

To turn the EL Alarm feature on and off

• In the Timekeeping Mode, hold down Buntil the EL Alarm indicator appears on (EL alarm on) or disappears from (EL alarm off) the display.

EL Alarm indicator

Hold down

ON OFF

STOPWATCH MODE

Mode indicator

The stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch

1/100

is 23 hours, 59 minutes, 59.99 seconds. You can use the

seconds

EL backlight at any time while the stopwatch is operating.

• The backlight may not illuminate if the face of the watch is more than 15 degrees off parallel to the left or right. Make sure that the back of your hand is parallel to the ground.

• Static electricity or magnetic force can interfere with proper operation of the auto backlight function. If the auto backlight does not illuminate, try moving the watch back to the starting position (parallel with the ground) and then tilt it back toward you again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.

• Under certain conditions the backlight may not light until about one second or less after turn the face of the watch towards you. This does not necessarily indicate malfunction of the backlight.

To switch the auto light switch function on and off

In the Timekeeping Mode, hold down Efor one or two seconds to turn the auto light switch function on and off.

• The auto light switch indicator is shown on the display in all modes while the auto light switch function is on.

• In order to protect against running down the battery, the auto light switch function is automatically turned off approximately three hours after you turn it on. Repeat the above procedure to turn the auto light switch function back on if you want.

• Pressing Dat any time illuminates the display, regardless of the auto light switch's on/off setting.

Parallel to ground More than 15 degrees

too high

Auto light switch indicator

Hold down

ON OFF

More than 15 degrees too low

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SecondsHours

Minutes

Elapsed time measurement

E E E E B

Start Stop Re-start Stop Clear

Split time measurement

E B B E B

Start Split Split release Stop Clear

Split time and 1st-2nd place times

E B E B B

Start Split Stop Split release Clear

First runner finishes.

Second runner finishes. Record time of first runner.

Record time of second runner.

COUNTDOWN ALARM MODE

Mode indicator

SecondsHours

Minutes

3.Press Eto increase the selected setting or Bto decrease it. Holding down either button changes the setting at high speed.

• To set the starting value of the countdown time to 24 hours, set 0:00' 00".

4.After you set the countdown start time, press Ato return to the Countdown Alarm Mode.

• If you do not operate any button for a few minutes while a setting is flashing, the

flashing stops and the watch goes back to the Countdown Alarm Mode automatically.

To use the countdown alarm

1.Press Ewhile in the Countdown Alarm Mode to start the countdown alarm.

2.Press Eagain to stop the countdown alarm.

• You can resume a paused countdown alarm operation by pressing E.

3.Stop the countdown alarm and then press Bto reset the countdown time to its starting value.

• When the end of the countdown is reached and auto repeat timing is off, the alarm

sounds for 10 seconds or until you stop the alarm by pressing any button. Countdown timing stops and the countdown time is automatically reset to its starting value after the alarm stops.

To turn auto repeat timing on and off

1.Hold down Awhile in the Countdown Alarm Mode until the hour setting flashes.

2.Press Dto turn auto repeat on and off.

The countdown alarm can be set within a range of 1

1/10

second to 24 hours. When the countdown reaches zero,

seconds

an alarm sounds for 10 seconds or until you press any button.

To set the countdown start time

1.Hold down Awhile in the Countdown Alarm Mode. The hour setting flashes on the display because it is selected.

2.Press Cto change the selection in the following sequence.

Hour Minutes Seconds

Auto repeat indicator

Press

To turn the daily alarm and hourly time signal on and off

Press Bwhile in the Alarm Mode to change the status of the daily alarm and hourly time signal in the following sequence.

[Module 1826]

ALM SIG

Both ON Both OFF Daily Alarm

[Module 1815, 1835]

Both ON Both OFF Daily Alarm

• The daily alarm on indicator and the Hourly Time Signal on indicator are shown on the display in all modes while these functions are turned on.

To test the alarm sound

Hold down Ewhile in the Alarm Mode to sound the alarm.

ALM SIG

Hourly Time

Only

Signal Only

Hourly Time Signal Only

3.Press Ato return to the Countdown Alarm Mode.

• When the end of the countdown is reached while auto repeat is on, the alarm sounds, but the countdown restarts from the beginning without stopping. You can stop the countdown by pressing Eand manually reset to the start time by pressing

• When the starting value of the countdown time is set at 10 seconds or less and auto repeat is turned on, the countdown alarm tone sounds for only one second instead of the normal 10 seconds. If the Flash Alarm is turned on, the EL backlight does not flash under the above conditions.

OFF ON

ALARM MODE

When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset time each day. Press any button to stop the alarm after it starts to sound. When the Hourly Time Signal is on, the watch beeps every hour on the hour.

Mode indicator

Alarm on indicator

Hours Minutes

To set the alarm time

1.Hold down Auntil the hour setting starts to flash on the display. The hour setting

flashes because it is selected.

• This operation automatically turns on the Daily Alarm.

2.Press Cto change the selection in the following sequence.

3.While the hour or minutes setting is selected (flashing) press Eto increase it or

to decrease it. Holding down either button changes the current setting at high speed.

• The format (12-hour and 24-hour) of the alarm time matches the format you select for normal timekeeping.

• When setting the alarm time using the 12-hour format, take care to set the time correctly as morning (no indicator) or afternoon (P).

4.After you set the alarm time, press Ato return to the Alarm Mode.

• If you do not operate any button for a few minutes while a setting is flashing, the flashing stops and the watch goes back to the Alarm Mode automatically.

Hourly time signal on indicator

Hour Minutes

Module 1815, 1835

Hourly time signal on indicator

Alarm on indicator

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