Casio Watch 1826 User Manual

2. OPERATION CHART: QW-1815/1835  
GENERAL GUIDE  
Press C to change from mode to mode.  
In any mode (except when making countdown alarm settings) press D to 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.  
Stopwatch Mode  
Countdown  
Alarm Mode  
Alarm Mode  
Timekeeping Mode  
[Module 1826]  
[Module 1815]  
[Module 1835]  
Caution  
TIMEKEEPING MODE  
The backlight of this watch employs an electro-luminescent (EL) light, which loses its  
illuminating power after very long term use.  
To set the time and date  
Frequent use of the backligfht shortens the battery life.  
1. Hold down A while in the Timekeeping Mode until the  
seconds digits flash on the display.  
2. Press C to change the selection (flashing) in the  
following sequence.  
Day  
Day of  
week  
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.  
Month  
Warning!  
Never try to read your watch when mountain climbing or hiking in areas that are dark  
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.  
Seconds  
Hour  
Minutes  
12/24-  
Hour  
Format  
Day  
Month  
Year  
3. While the seconds setting is selected (flashing), press  
E to reset it to 00. If you press E while 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 E to increase it or B to decrease it.  
While the 12/24-hour format setting is selected, press  
E to toggle it between 12 and 24.  
Hour  
Minutes  
Seconds  
PM  
indicator  
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  
Except for the seconds or 12/24-hour setting, holding down a button changes the  
setting at high speed.  
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 D  
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.  
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 A to 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.  
To turn the EL Alarm feature on and off  
In the Timekeeping Mode, hold down B until the EL Alarm indicator appears on (EL  
alarm on) or disappears from (EL alarm off) the display.  
EL Alarm indicator  
ABOUT THE BACKLIGHT  
Hold down B  
?
?
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.  
ON  
OFF  
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.  
STOPWATCH MODE  
The stopwatch Mode lets you measure elapsed time,  
split times, and two finishes. The range of the stopwatch  
is 23 hours, 59 minutes, 59.99 seconds. You can use the  
EL backlight at any time while the stopwatch is  
operating.  
Mode indicator  
1/100  
seconds  
Parallel to  
ground  
40°  
?
Hours  
Seconds  
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.  
Minutes  
Elapsed time measurement  
Parallel to ground  
More than 15 degrees  
too high  
More than 15 degrees  
too low  
E
Start  
E
Stop  
E
Re-start  
E
Stop  
B
Clear  
Split time measurement  
E
Start  
B
Split  
B
Split release  
E
Stop  
B
Clear  
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.  
Split time and 1st-2nd place times  
E
Start  
B
Split  
E
Stop  
Second runner  
finishes.  
Record time of  
first runner.  
B
B
Clear  
Split release  
Record time of  
second runner.  
First runner  
finishes.  
To switch the auto light switch function on and off  
In the Timekeeping Mode, hold down E for one or two seconds to turn the auto light  
switch function on and off.  
Auto light switch  
indicator  
Hold down E  
?
?
10 58  
50  
ON  
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 D at any time illuminates the display, regardless of the auto light switch's  
on/off setting.  
— 2 —  
 

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