Casio QW 5535 User manual

Operation Guide 5535
E-9
To do this: Enter this mode: See:
xDisplay a second time
xConfigure settings for a second time Dual Time Mode E-48
E-8
Mode Reference Guide
The mode you should select depends on what you want to do.
To do this: Enter this mode: See:
xView the current time and date
xConfigure daylight saving time (DST) settings
xConfigure time and date settings
xStart elapsed time measurement with a single
button press
Timekeeping Mode
E-16
E-17
E-25
xMeasure elapsed time
xRecord lap times (up to 120) Stopwatch Mode E-22
xView data recorded in the Stopwatch Mode Data Recall Mode E-32
xUse the countdown timer Countdown Timer Mode E-40
xSet an alarm time
xTo turn an alarm or the hourly time signal on or off Alarm Mode E-43
E-7
To turn the auto light switch on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-55
Adjusting Hand Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-58
To adjust hand alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-59
Button Operation Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-61
To turn the button operation tone on and off . . . . . . . . . . . . . . . . . . . . . . . . . E-61
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-62
Main Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-63
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-64
Operating Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-67
User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-78
E-6
Using the Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43
To enter the Alarm Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43
To set an alarm time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-44
To test the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-45
To turn an alarm and the Hourly Time Signal on and off . . . . . . . . . . . . . . . . . E-46
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-47
Dual Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-48
To enter the Dual Time Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-48
To set the Dual Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-48
To swap Timekeeping Mode and Dual Time Mode times . . . . . . . . . . . . . . . . E-50
Illumination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51
To turn on illumination manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51
To change the illumination duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-52
E-5
To perform an elapsed time operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-26
To perform lap time measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-26
Viewing Lap Time Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-32
To enter the Data Recall Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
To select a desired date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
To delete a session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-37
Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-40
To enter the Countdown Timer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-40
To configure the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-41
To perform a countdown timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-42
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-42
E-4
Contents
About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Mode Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Timekeeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-16
Adjusting the Digital Time and Date Settings . . . . . . . . . . . . . . . . . . . . . . . . . E-17
To configure the digital time and date settings . . . . . . . . . . . . . . . . . . . . . . . . E-17
To change the Daylight Saving Time (summer time) setting . . . . . . . . . . . . . . E-21
Using the Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-22
To enter the Stopwatch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-24
E-3
Features
Your watch provides you with the features and functions described below.
◆Stopwatch..................... Page E-22
Use the stopwatch to measure
elapsed times and lap times. Elapsed
time measurement can be started
with a single button press from the
Timekeeping Mode. Memory for up to
120 lap time records.
◆Timer.............................. Page E-40
The timer counts down from a preset
start time. An alarm sounds when the
end of the countdown is reached.
◆Alarm.............................. Page E-43
When the alarm time is reached, the
watch sounds an alert.
◆Dual time....................... Page E-48
You can view the current time in your
current location and in one more time
zone.
E-2
About This Manual
xDepending on the model of your watch, display text
appears either as dark figures on a light background, or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.
xButton operations are indicated using the letters shown in
the illustration.
xNote that the product illustrations in this manual are
intended for reference only, and so the actual product may
appear somewhat different than depicted by an illustration.
E-1
ENGLISH
Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is
designed, carefully read and follow the instructions in this manual, especially the
information under “Operating Precautions” and “User Maintenance”.
Be sure to keep all user documentation handy for future reference.
MA1705-EA © 2017 CASIO COMPUTER CO., LTD.

Operation Guide 5535
E-19
3. When the timekeeping setting you want to change is flashing, use Dand/or B
to change it as described below.
Screen To do this: Do this:
Reset the seconds to 00 Press D.
Toggle between 12-hour (12H) and 24-hour
(24H) timekeeping Press D.
Change the hour or minute Use D(+) and B(–).
Change the year Use D(+) and B(–).
Change the month or day Use D(+) and B(–).
4. Press Ato exit the setting mode.
E-18
2. Press Cto move the flashing in the sequence shown below to select the other
settings.
Seconds
CDST
(page E-21)
C
12/24-Hour Format
C
Hour
CC
Illumination Duration
(page E-51) Minutes
C C
Button Operation Tone On/Off
(page E-61) C
Day
C
Month
C
Year
E-17
Adjusting the Digital Time and Date Settings
Use the procedure below to adjust the digital time and date settings.
To configure the digital time and date settings
1. In the Timekeeping Mode, hold down Auntil the
seconds digits start to flash (about two seconds).
xThis enables setting of the seconds.
E-16
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date.
xPress Ato toggle the digital display between date/day
of the week and hour/minutes/seconds.
Date,
day of the week Hour, minute, second
A
PM indicator
Hour
Minutes
Day of the week
Month-Day
Seconds
E-15
2. Holding down Lagain as you press Cwill cause the hands to return to their
normal positions (normal timekeeping).
Note
xThis operation can be performed in any mode. In the case of a setting mode
(setting flashing on the screen), the hour and minute hands will move out of the
way, and the second hand will move to 12 o’clock automatically even if you do not
perform the above operation.
xWatch button functions are the same regardless of whether the hands are move
out of the way or at their normal positions.
xChanging to another mode will cause the hands to move back to their normal
positions.
xThe hands also will move back to their normal positions automatically if no
operation is performed for about one hour.
E-14
Moving the Hands Out of the Way for Better Viewing
You can use the procedure below to temporarily move the hour and minute hands
out of the way to better view what is on the display.
1. While holding down L, press C.
xThe watch will beep twice and the hour and minute hands will move to a position
where they do not block the digital display.
Example: When the current time is 8:25
Flashes while the hands are
moved out of the way.
E-13
xScrolling
The Band Dbuttons are used on the setting mode to scroll through data on the
display. In most cases, holding down these buttons during a scroll operation scrolls
through the data at high speed.
E-12
xIn the Timekeeping Mode, press Dto enter the Stopwatch Mode.
xFor more information about using the Stopwatch Mode, see “To enter the
Stopwatch Mode” (page E-24).
General Functions (All Modes)
The functions and operations described in this section can be used in all of the
modes.
xAuto Return Features
If you do not perform any operation for two or three minutes while configuring time
or other settings (with a setting flashing), or while adjusting hand positions (page E-58),
the watch will automatically exit the setting or adjustment mode.
The watch will automatically return to the Timekeeping Mode if you do not perform
any operation for a certain amount of time, as described below.
Mode Approximate Elapsed Time
Alarm 3 minutes
Data Recall 3 minutes
E-11
xTo return to the Timekeeping Mode from any other mode, hold down Cfor about
two seconds.
xIn any mode (except a setting mode), press Bto illuminate the display.
Countdown Timer Mode Alarm Mode Dual Time Mode
C
C C
E-10
Selecting a Mode
xPress Cto cycle between the modes as shown below.
Timekeeping Mode Data Recall ModeStopwatch Mode
C C C

Operation Guide 5535
E-29
Memory
The watch has enough memory to hold up to 121records for session start
information (date and time), and lap time records. You can record up to 120lap
times.
xSession start information (date and time) requires one record for each session. A
session is from the start of measurement up the point the stopwatch is reset.
xEach lap time uses one record.
Example 1: Single session (from start to reset)
Start information (date and time) record + 120lap time records =
121records in total
Example 2: Multiple sessions
Session 1: Start information (date and time) record + 60lap time
records = 61records
Session 2: Start information (date and time) record + 59lap time
records = 60records
Total: 121records
E-28
Note
xThe watch will exit the lap time screen automatically after about eight seconds.
xAn ongoing elapsed time measurement operation will continue internally even if
you change to another mode. However, if you exit the Stopwatch Mode while a
lap time is displayed, the lap time will not be displayed when you return to the
Stopwatch Mode.
E-27
LAP indicator
LAP time
xEach press of Brecords the current lap time. Memory can hold up to 120lap
time records.
xRecording a lap time while there are 120records in memory will automatically
delete the oldest record to make room for the new one.
xThe final lap time (time displayed when the elapsed time operation is stopped) is
recorded in memory when the stopwatch is reset to all zeros.
E-26
Entering from Another Mode (including the Timekeeping Mode)
Use Cto select the Stopwatch Mode as shown on page E-10.
xTo enter from the Timekeeping Mode using this method, press Conce.
xThis will display the stopwatch screen in the same status as it was the last time you
exited the Stopwatch Mode.
To perform an elapsed time operation
DD D D B
Start Stop (Resume) (Stop) Reset
To perform lap time measurement
DB B ...... D B
Start Lap (LAP1) Lap (LAP2) Stop Reset
E-25
Entering Directly from the Timekeeping Mode
If the stopwatch was reset to all zeros the last time you used it, a new elapsed time
operation will start as soon as you enter the Stopwatch Mode.
See page E-26 for information about measuring an elapsed time.
1. In the Timekeeping Mode, press D.
This will result in one of the following, depending on the status of the stopwatch the
last time you exited the Stopwatch Mode.
xStopwatch reset: Timing starts.
One-press timing start from the Timekeeping Mode (direct timing start from the
Timekeeping Mode).
xIf an ongoing timing operation is paused: Timing remains paused.
xIf an ongoing timing operation is in progress*: Timing continues to be performed.
*An ongoing stopwatch timing operation continues even if you navigate to
another mode from the Stopwatch Mode.
2. Now you can perform the same operations as those shown on page E-26.
E-24
What is a lap time?
A lap time is the time elapsed over a specific segment of a race.
Example: Car race on an oval track
Start Lap 1
Lap 2
Lap 3
To enter the Stopwatch Mode
You can enter the Stopwatch Mode using any one of the methods below.
E-23
Time Range Display Switching
Whenever the elapsed time exceeds 1 hour, the measurement changes from
1/100-second units to 1-second units.
Seconds Minutes
Minutes Hour
1/100 seconds Seconds
E-22
Using the Stopwatch
The stopwatch measures elapsed time and lap times. Up
to 120lap times can be stored in memory.
xThe measurement range of the stopwatch is 23hours,
59minutes, 59seconds. When the measurement range
is exceeded, measurement stops (display becomes0).
Seconds
Minutes
Measurement
in progress
1/100 seconds
E-21
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the
seconds digits start to flash (about two seconds).
xThis enables setting of the seconds.
2. Press Cto display the DST setting mode.
3. Press Dto toggle between Daylight Saving Time (ON)
and Standard Time (OFF).
4. After the setting is the way you want, press Ato
return to the Timekeeping Mode.
xThe DST indicator appears to indicate that Daylight
Saving Time is turned on.
Note
xDaylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
DST indicator
E-20
Note
xResetting the seconds to 00 while the current count is in the range of 30 to
59causes the minutes to be increased by 1.
xThe 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.
xThe day of the week changes automatically when the date changes.
xWhile the 12-hour format is selected for timekeeping, a P(PM) indicator will appear
for times from noon to 11:59 p.m. No indicator appears for times from midnight to
11:59 a.m. With 24-hour format, time is displayed from 0:00 to 23:59, without any
P(PM) indicator.

Operation Guide 5535
E-39
Deleting All Lap Time Records
1. Hold down Afor about five seconds.
CLR will flash and then remain displayed to indicate that one record was deleted.
Keep Adepressed until ALL CLR flashes for about 1.5 seconds, indicating that all
records were deleted.
Note
xAll records cannot be deleted while a measurement session is in progress.
E-38
2. Hold down Afor about two seconds.
CLR will flash and then remain displayed.
Note
xA session cannot be deleted if its time measurement is still in progress.
E-37
Deleting Lap Time Records
To delete a session
You can delete records in session units only. You cannot delete a particular lap
time record within a session.
1. Use Band Dto display the start information (date and time) of the session you
want to delete.
Measurement Date (Month/Day/Day of the week)
Alternates every
twoseconds
Time the measurement was performed
E-36
D
B
DB
Oldest record Next older record
Lap number
Lap time
LAP indicator
Alternates every
twoseconds
Alternates every
twoseconds
E-35
Viewing Lap Records
1. While the start information (date and time) of the session you want to view is
displayed, press A.
xThis displays the lap time record of the selected session.
2. Use Band Dto scroll between laps.
3. To return to the session start information (date and time), press A.
E-34
D
B
Newest session Session one before
Alternates every
twoseconds
Alternates every
twoseconds
Measurement
Date (Month/Day/
Day of the week)
Time the measurement was performed
DB
E-33
To enter the Data Recall Mode
Use Cto select the Data Recall Mode as shown on page E-10.
Viewing Lap Records
To select a desired date and time
In the Data Recall Mode, use Band Dto scroll to the start information (date and
time) of the session you want.
E-32
Viewing Lap Time Records
Use the Data Recall Mode to view lap time records.
Entering the Data Recall Mode displays the start date (month, day, day of the week)
and time of the most recent session.
Measurement Date (Month/Day/Day of the week)
Alternates every
twoseconds
Time the measurement was performed
E-31
Memory Full
Storing data when memory is full automatically deletes the oldest record currently
in memory to make room for the new data.
Example 1: When there are 121 records for a single session in memory
The oldest lap time record in memory is deleted to make room for the
new lap time.
Example 2: When there is data for multiple sessions (dates and times) in memory
All of the data of the session with the oldest date and time is cleared to
make room for the new lap time.
Note
xTo clear records data manually, see “Deleting Lap Time Records” (page E-37).
E-30
Note
xUse the Data Recall Mode to view records. See “Viewing Lap Records” (page E-33).
Memory Timing
The table below explains how data is stored in memory when Dor Bis pressed.
Operation Result
While the stopwatch is reset to all zeros,
press Dto start a session.
This stores the current date and time in
memory as session start information.
Press Dto stop time measurement. Nothing is recorded when time measurement
is stopped.
Press Dto resume time measurement. Nothing is recorded when time measurement
is resumed.
Press Bto measure a lap time. A lap time record is stored in memory.
Press Bto reset the stopwatch to all zeros. The final lap time record for the session is
stored in memory.

Operation Guide 5535
E-49
2. Press Cto change the selection in the following sequence.
Hour and minute DST
C
3. Press Dto increase the selected digits and Bto decrease them.
xEach press of Dtoggles summer time between on (ON) and off (OFF). When
summer time is on, a DST indicator is displayed on the Dual Time Mode screen.
xWhile the 12-hour format is selected for timekeeping, a P(PM) indicator will
appear for times from noon to 11:59 p.m.
4. After you set the time, press Ato return to the Dual Time Mode.
xIn the Dual Time Mode, the seconds count is synchronized with the seconds
count of the Timekeeping Mode.
Note
xDaylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
E-48
Dual Time Mode
You can use the Dual Time Mode to set a second time (in
15minute steps) that is different from the Timekeeping
Mode time.
To enter the Dual Time Mode
Use Cto select the Dual Time Mode as shown on
page E-11.
To set the Dual Time
1. Hold down Awhile in the Dual Time Mode. The hour
and minute digits flash on the display because they
are selected.
Current time
MinutesHour
E-47
Alarm indicator
Alarm on/off
Hourly time signal indicator
To stop the alarm
Press any button.
E-46
To turn an alarm and the Hourly Time Signal on or off
1. In the Alarm Mode, use Dor Bto select an alarm or the Hourly Time Signal.
xEach press of Dor Bcycles between the alarm time screen and the hourly
time signal setting screen.
2. Press Ato toggle the displayed setting (alarm or hourly time signal) between
on and off.
xThis will cause the second hand to move to ON or OFF.
xAn alarm on indicator will be on the display whenever any one of the five alarms
is turned on. Turning on the hourly time signal causes its indicator to appear on
the screen.
E-45
3. Press Cto move the flashing between the hour and
minute settings.
4. While a setting is flashing, use D(+) and B(–) to
change it.
xWhile the 12-hour format is selected for timekeeping,
a P(PM) indicator will appear for times from noon to
11:59 p.m.
5. Press Ato exit the setting mode.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
Alarm time hour
E-44
To set an alarm time
1. Press Dor Bto display the setting (–1 through –5, or
SIG ) you want to
change.
–1 –2
–5
–3
–4
D
B
B
D
D
B
B
D
DBBD
SIG
2. Hold down Auntil the hour digits of the current alarm time start to flash (about
two seconds). This is the setting mode.
xThis also causes the alarm indicator to appear and turns on the alarm setting.
E-43
Using the Alarm
You can set up to five different alarms.
The watch beeps for about 10 seconds when the alarm
time is reached. The hourly time signal causes the watch
to beep every hour on the hour.
To enter the Alarm Mode
Use Cto select the Alarm Mode as shown on page E-11.
E-42
To perform a countdown timer operation
DD D D B
Start Stop (Resume) (Stop) Reset
xBefore starting a countdown timer operation, check to make sure that a
countdown operation is not in progress (indicated by the seconds counting down).
If it is, press Dto stop it and then Bto reset to the countdown start time.
To stop the alarm
Press any button.
E-41
To configure the countdown timer
1. Hold down Afor about two seconds until the minute
digits of the start time start to flash.
xIf the countdown start time is not displayed, use the
procedure under “To perform a countdown timer
operation” (page E-42) to display it.
2. Press Cto toggle the flashing between the minutes
and seconds.
3. Use Dand Bto change the setting of the flashing digits (minutes or seconds).
xYou can set a start time in the range of one second to 100 minutes in
one-second increments.
xTo set the starting value of the countdown time to 100 minutes, set 00'00.
4. Press Ato exit the setting mode.
E-40
Countdown Timer
The countdown timer can be set within a range of
onesecond to 100 minutes. An alarm sounds when the
countdown reaches zero.
To enter the Countdown Timer Mode
Use Cto select the Countdown Timer Mode as shown
on page E-11.
Seconds
Minutes

Operation Guide 5535
E-59
To adjust hand alignment
1. In the Timekeeping Mode, hold down Afor about
fiveseconds until SEC 00 appears.
xThis indicates the second hand adjustment mode.
xThough SET and then H-S will appear as you hold
down A, do not release the button yet.
xSEC 00 flashes on the display while the second hand
is moving to the home position (12 o’clock).
2. If the second hand is not at 12o’clock, use Dand B
to move it there.
Second hand
E-58
Adjusting Hand Positions
The watch hands can go out of alignment with the time on the digital display if it
is exposed to strong magnetism or impact. If this happens, you should adjust the
hand positions.
Important!
xYou do not need to perform the operation below as long as the analog hands
indicate the same time as the digital display.
E-57
xIllumination may not turn on if the face of the watch is more than
15degrees above or below parallel. Make sure that the back of
your hand is parallel to the ground.
xIllumination turns off after the preset illumination duration (page E-52),
even if you keep the watch pointed towards your face.
xStatic electricity or magnetic force can interfere with proper
operation of the auto light switch. If illumination does not turn on,
try moving the watch back to the starting position (parallel with the
ground) and then tilt it back towards your face 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.
xYou may notice a very faint clicking sound coming from the
watch when it is shaken back and forth. This sound is caused
by mechanical operation of the auto light switch, and does not
indicate a problem with the watch.
E-56
Illumination Precautions
xLED panel that provides illumination loses power after very long use.
xIllumination may be hard to see when viewed under direct sunlight.
xIllumination turns off automatically whenever an alarm sounds.
xFrequent use of illumination runs down the battery.
Auto light switch precautions
xWearing the watch on the inside of your wrist, movement of your arm, or vibration
of your arm can cause frequent activation of the auto light switch and illumination
of the face. To avoid running down the battery, disable the auto light switch
whenever engaging in activities that might cause frequent illumination of the face.
xNote that wearing the watch under your sleeve while the auto light switch is
enabled can cause frequent illumination of the face and can run down the battery.
E-55
To turn the auto light switch on and off
In the Timekeeping Mode, hold down Lfor about three
seconds to toggle the auto light switch on (indicator
displayed in the right digital dial) and off (indicator not
displayed).
xThe auto light switch on indicator appears in all modes
while the auto light switch is enabled.
xAuto light remains enabled for about six hours. After that
it becomes disabled automatically.
Auto light switch on
indicator
E-54
xWhen you are wearing the watch, make sure that its auto light switch is
disabled 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.
Note
xThis watch features a “LED”, so the auto light switch operates only when available
light is below a certain level. It does not illuminate the face under bright light.
xThe auto light switch is always disabled, regardless of its on/off setting, when the
following condition exists.
While an alarm is sounding
E-53
About the Auto Light Switch
Enabling the auto light switch causes illumination
to turn on, whenever you position your wrist as
described below in any mode.
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.
Warning!
xAlways make sure you are in a safe place
whenever you are reading the face of 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 startle or
distract others around you.
More than
40°
Wear the watch on the
outside of your wrist
E-52
xThe above operation turns on illumination regardless of the current auto light switch
setting.
To change the illumination duration
1. In the Timekeeping Mode, hold down Auntil the seconds digits start to flash
(about two seconds).
xThis enables setting of the seconds.
2. Press Cnine times to display the illumination duration
setting screen (page E-18).
The screen will show either LT1 or LT3.
3. Press Dto toggle the illumination duration setting
between LT1 (1.5 seconds) and LT3 (3seconds).
4. After all the settings are the way you want, press Ato
exit the setting screen.
E-51
Illumination
The face of the watch is illuminated for easy reading in
the dark.
The watch’s auto light switch turns on illumination
automatically when you angle the watch towards your
face.
xThe auto light switch must be enabled (page E-55) for it to
operate.
To turn on illumination manually
Press Lin any mode to illuminate the face of the watch.
xYou can use the procedure below to select either
1.5seconds or three seconds as the illumination
duration. When you press L, the face will remain
illuminated for about 1.5 seconds or three seconds,
depending on the current illumination duration setting.
E-50
To swap Timekeeping Mode and Dual Time Mode times
1. In the Dual Time Mode, hold down Dfor about two seconds.
After the starts to flash, the Timekeeping Mode time and Dual Time Mode
time will be swapped with each other.
D
At least two seconds
Dual Time Timekeeping Mode time

Operation Guide 5535
E-66
Power Supply: One lithium battery (Type: CR2016)
Approximate battery operating time: 3 years under the following conditions:
x1 illumination operation (1.5 seconds) per day
xAlarm: 10 seconds/day
Frequent use of illumination runs down the battery.
Specifications are subject to change without notice.
E-65
Countdown Timer:
Measuring unit: 1 second
Countdown range: 100 minutes
Countdown start time setting range: 1 second to 100 minutes
(1-second increments)
Timer alert time: 10 seconds
Alarms: 5 daily alarms; Hourly time signal
Dual Time: Hour, minutes
Setting Unit: 15 minutes
Other: Daylight Saving Time (summer time)/Standard Time
Illumination: LED (light-emitting diode); Selectable illumination duration
(approximately 1.5 seconds or 3 seconds); Auto light
Other: Alarm test; Button operation tone on/off; Moving the Hands to View the
Digital Display
E-64
Specifications
Accuracy at normal temperature: ±15 seconds a month
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the
week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Standard Time/Daylight Saving Time (summer time)
Analog Timekeeping: Hour, minutes (hand moves every 10seconds), seconds
Stopwatch/Data Recall:
Measuring unit: 1/100 second (1 second after 1 hour)
Measuring capacity: 23 hours 59 minutes, 59 seconds (24 hours)
Measuring modes: Elapsed time, Lap time, Lap memory (120 records)
One-press timing start from the Timekeeping Mode
E-63
Main Indicators
Number Name See
1
1
PM indicator E-16
2
2
Hands shifted indicator E-14
3
3
LAP indicator E-36
4
4
DST indicator E-21
5
5
Auto light switch on indicator E-55
6
6
Alarm indicator E-47
7
7
Hourly time signal indicator E-47
75 6
1 2 3 4
E-62
Troubleshooting
Time Setting
■The current time setting is off by one hour.
You may need to change standard time/daylight saving time (DST) setting. Use the
procedure under “Adjusting the Digital Time and Date Settings” (page E-17) to change
the standard time/daylight saving time (DST) setting.
E-61
Button Operation Tone
You can turn the button operation tone on or off as
desired.
xEven if you turn off the button operation tone, alarms,
the Hourly Time Signal, and other beepers all operate
normally.
To turn the button operation tone on or off
1. In the Timekeeping Mode, hold down Auntil the
seconds digits start to flash (about two seconds).
xThis enables setting of the seconds.
2. Press Ceight times to display the button operation tone On/Off screen (page E-18).
The screen will show either BEEP ON or BEEP OFF.
3. Press Dto toggle the setting between BEEP ON and BEEP OFF.
4. After all the settings are the way you want, press Ato exit the setting screen.
E-60
3. Press C.
xThis enters the hour and minute hand adjustment
mode.
xPress Cagain* to return to the second hand
adjustment mode.
*Nothing will happen if you press Cwhile the hands
are moving.
x0:00 flashes on the display while the hour and minute
hands are moving to the home position (12 o’clock).
4. If the hour and minute hands are not at 12 o’clock,
use Dand Bto adjust them until they are.
5. Press Ato return to the Timekeeping Mode.
Check to make sure that the time indicated by the
hands matches the time on the digital display. If the
times don’t match, perform the correction procedure
above again.
Hour hand and minute hand