Casio QW 5540 User manual

Operation Guide 5540
E-9
Illumination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-69
To illuminate the face. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-69
To change the illumination duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-69
Adjusting Hand Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-71
To adjust hand alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-72
Button Operation Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-74
To turn the button operation tone on and off . . . . . . . . . . . . . . . . . . . . . . . . . E-74
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-75
Main Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-78
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-79
Operating Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-83
E-8
To perform a countdown timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-60
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-60
Using the Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-61
To enter the Alarm Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-61
To set an alarm time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-61
To test the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-62
To turn an alarm and the Hourly Time Signal on and off . . . . . . . . . . . . . . . . . E-63
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-64
Dual Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-65
To enter the Dual Time Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-65
To set the Dual Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-65
To swap Timekeeping Mode and Dual Time Mode times . . . . . . . . . . . . . . . . E-67
E-7
To specify a daily step goal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
To check your step count history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-36
To reset the daily step goal attainment day count. . . . . . . . . . . . . . . . . . . . . . E-48
To turn Step Reminder on or off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-50
To clear the flashing “STEP!!” notification . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51
Using the Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-52
To enter the Stopwatch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-53
To perform an elapsed time operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-53
To perform lap time measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-54
To recall lap data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-56
Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-58
To enter the Countdown Timer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-58
To configure the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-59
E-6
Contents
About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Mode Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11
Timekeeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17
Adjusting the Digital Time and Date Settings . . . . . . . . . . . . . . . . . . . . . . . . . E-18
To configure the digital time and date settings . . . . . . . . . . . . . . . . . . . . . . . . E-18
To change the Daylight Saving Time (summer time) setting . . . . . . . . . . . . . . E-22
Pedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-23
To check step count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-28
To reset today’s step count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-31
E-5
◆Stopwatch..................... Page E-52
Use the stopwatch to measure elapsed
times and lap times. Memory for up to
30 lap time records.
◆Timer.............................. Page E-58
The timer counts down from a preset
start time. An alarm sounds when the
end of the countdown is reached.
◆Alarm.............................. Page E-61
When the alarm time is reached, the
watch sounds an alert.
◆Dual time....................... Page E-65
You can view the current time in your
current location and in one more time
zone.
E-4
◆Step count data storage
........................................ Page E-35
xToday’s and past seven day’s daily
data
xThis week’s and past three week’s
weekly data
xCount of the days you attained your
daily step count goal (GOAL)
◆Step count attainment
notification
........................................ Page E-35
A GOAL indicator flashes when you
attain your daily step goal. Your step
goal progress is also displayed (Step
goal progress).
E-3
Features
Your watch provides you with the features and functions described below.
◆Pedometer .................... Page E-23
Count the steps you
take.
◆Over-sitting prevention
........................................ Page E-49
A Step Reminder displays an indicator
and sounds an alert whenever the
watch determines that you have not
walked for a specific amount of time.
This helps to ensure that you are
getting enough exercise on a regular
basis.
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.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any
damage or loss suffered by you or any third party arising through the use of your
watch or its malfunction.
MA1705-EA © 2017 CASIO COMPUTER CO., LTD.

Operation Guide 5540
E-19
2. Press Cto move the flashing in the sequence shown below to select the other
settings.
Seconds
CDST
(page E-22)
C
12/24-Hour Format
C
Hour
CC
Illumination Duration
(page E-69) Minutes
C C
Button Operation Tone On/Off
(page E-74) C
Day
C
Month
C
Year
E-18
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-17
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date.
xEach press of Acycles the digital display contents as
shown below.
Date, day of
the week
Date, step count
graph Steps
Hour, minute,
second
A A A
PM indicator
A
Hour
Minutes
Day of the week
Month-Day
Seconds
E-16
2. Holding down Bagain 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-15
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 B, 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-14
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 leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
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
Step count history screen 2 minutes
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-13
Countdown Timer Mode Alarm Mode Dual Time Mode
C
C C
E-12
Selecting a Mode
xPress Cto cycle between the modes as shown below.
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.
Timekeeping Mode Stopwatch Mode
C C
E-11
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
xRecord or view your step count with the pedometer
xDaily step goal and step reminder settings
Timekeeping Mode E-17
E-23
xMeasure elapsed time
xRecord lap times (up to 30) Stopwatch Mode E-52
Use the countdown timer Countdown Timer Mode E-58
xSet an alarm time
xTo turn an alarm or the hourly time signal on or off Alarm Mode E-61
xDisplay a second time
xConfigure settings for a second time Dual Time Mode E-65
E-10
User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-94

Operation Guide 5540
E-29
STEPS mark
A
Step count Hour, minute, second
A
E-28
Checking Step Count
To check step count
1. In the Timekeeping Mode, use Ato cycle through step count information as
shown below.
A A
Timekeeping Mode
Date, day of the Week
Date, step count graph
E-27
xWhile you are walking, the step indicators alternately flash on the display at
one-second intervals. Both step indicators are displayed without flashing while you
are not moving, and both indicators are cleared from the display while the sensor is
stopped, in order to conserve battery power.
Step indicators
E-26
Pedometer Details
Step Count
xThe step counter can count from 0 to 999,999 steps. If the step count exceeds
999,999, the maximum value (999,999) remains on the display.
xThe step count is not displayed at the beginning of a walk in order to avoid
miscounting of non-walking movements. It appears only after you have continued
walking for about 10 seconds, with the number of steps you took during that time
added to the total.
xThe step count is automatically reset to zero at midnight each day.
xYou can also manually reset the daily step count that is displayed in the
Timekeeping Mode. Note that doing so does not reset the daily step count on the
history screen. This makes the displayed step count zero and counts steps from
there. This comes in handy when you want to count the number of steps between
twopoints. See “To reset today’s step count” (page E-31).
E-25
xNormal daily non-walking activities (cleaning, etc.)
xWearing the watch on your dominant hand
xWalking for less than 10 seconds
xWatch hand movement (by the hand shift function, etc.)
Power Saving
To save power, sensor operation stops automatically if there is no movement
detected by the watch and you do not perform any operation for two to three
minutes.
E-24
Important!
xIf the band is loose, the pedometer will count steps, but step count accuracy may
be reduced.
If you are experiencing problems getting relatively accurate step counts
Any of the conditions below may make proper measurement impossible.
xWearing slippers, sandals, or other footwear that encourages a shuffling gait
xWalking on tile, carpeting, snow, or other surface that causes a shuffling gait
xIrregular walking (in a crowded location, in a line where walking stops and starts at
short intervals, etc.)
xExtremely slow walking or extremely fast running
xPushing a shopping cart or baby stroller
xIn a location where there is a lot of vibration, or riding in a car or other vehicle
xFrequent movement of the hand or arm (clapping, fanning movement, etc.)
xWalking while holding hands, walking with a cane or stick, or engaging in any other
movement in which your hand and leg movements are not coordinated with each
other.
E-23
Pedometer
The watch has a built-in 3-axis accelerometer that counts the steps you take.
You can specify a daily step goal and keep track of your step goal progress.
A Step Reminder function helps to keep you from sitting too much.
Pedometer Precautions
While the watch is on your wrist, the pedometer may detect non-step movements
and count them as steps. Also, abnormal arm movements while walking may
cause a miss count of steps.
Wearing the Watch
OK NG To ensure proper step count measurement,
wear the watch as shown in the illustration
nearby.
Wear the watch on your wrist, with the band
tightened securely.
E-22
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-21
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.
E-20
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.

Operation Guide 5540
E-39
History Screen
Weekly data
A
Count of the days
you attained your
daily step count
goal (GOAL)
Two seconds
Alternates
every two
seconds
Alternates every
two seconds
Weekly data GOAL data
Step count
(weekly total)
E-38
Timekeeping Mode
Daily data
D
C
A
Alternates
every two
seconds
Step count
Step goal
progress
Two seconds
Daily data
E-37E-36
To check your step count history
1. In the Timekeeping Mode, press D.
xThis displays DATA and then the daily data history screen.
2. Use Ato select the data you want.
xEach press of Acycles between data in the following sequence: Daily data
(DAY) ➝Weekly data (WK) ➝Days step count goal was attained ➝Daily data
(DAY) ... etc.
xTo return to the Timekeeping Mode, press C.
Note
xIn the Timekeeping Mode, pressing Dnine times will scroll through daily data
records (today and previous seven days) and will return to the Timekeeping Mode
display.
E-35
Daily Step Goal Attainment Notification
The GOAL indicator will flash on the display to let you
know you attained your daily step goal.
xThe GOAL indicator will be cleared from the display at
midnight of the current day. The GOAL indicator will also
be cleared from the display if you change your daily step
goal to a value that is greater than the current day's
step count.
Checking Your Step Count Records (History)
You can use the procedure below to check your daily data for today and the
previous seven days, as well as the count of the days you attained a daily step
count goal (GOAL) defined by you.
Important!
xBattery replacement will cause step count history data to be deleted.
GOAL indicator
E-34
2. Hold down Auntil the current daily step goal setting
starts to flash (about two seconds).
3. Use D(+) and B(–) to change the flashing daily step
goal value.
4. Press Ato exit the setting operation.
Note
xThe GOAL indicator will flash on the display when you
attain your daily step goal.
xThe GOAL indicator will also be shown on the
corresponding history screen when you attain a daily
step count goal or a weekly step count goal.
Daily step goal
E-33
Setting a Daily Step Goal
After you set a daily step goal, the second hand and display will show what percent
of your goal you have attained (step goal progress).
You can specify a daily step goal in units of 1,000 steps within the range of 1,000
to 50,000.
xThe initial default setting is 10,000 steps.
To specify a daily step goal
1. In the Timekeeping Mode, press D.
xThis displays DATA and then the daily data history
screen.
E-32
2. Hold down Dfor about two seconds until zero starts flashing and then remains
displayed without flashing.
xThis operation resets the displayed step count value only, and does not affect
the current day’s total step count maintained in memory. You can view the
current day’s step count total using step count history.
D
About two seconds
Step count
E-31
xNone of the segments of a bar are darkened when the step count for that hour is
zero.
Note
xGraph contents are normally updated at the top of each hour.
xGraph contents continue to be updated while any one of the conditions below
exists.
−When sensor operation is stopped to save power
−When measurement is not possible due to sensor error or insufficient power
To reset today’s step count
1. In the Timekeeping Mode, use Ato display today’s step count.
E-30
Step Count Graph
The Timekeeping Mode Step Count Graph shows the number of steps (up to 1,000)
you have taken each hour.
This lets you easily check the walking pace over the past four or five hours.
Interpreting the Step Count Graph
T5–T4 T4–T3 T3–T2 T2–T1 T1–
Current
Level 5 : 1001 –
Level 4 : 751 – 1000
Level 3 : 501 – 750
Level 2 : 251 – 500
Level 1 : 1 – 250
T1: Last top of the hour
T2: One hour before T1
T3: Two hours before T1
T4: Three hours before T1
T5: Four hours before T1

Operation Guide 5540
E-49
Step Reminder
Studies indicate that sitting too much has an adverse
effect on human health.
A Step Reminder feature displays an indicator and
sounds an alert whenever the watch determines that
you have not walked for a specific amount of time. This
helps to ensure that you are getting enough exercise on
a regular basis.
Make sure that you keep walking for at least five minutes
after activating Step Reminder.
xThe initial default Step Reminder setting is OFF.
Step indicators
E-48
To reset the daily step goal attainment day count
1. While the total number days is displayed, hold down Dfor about three seconds
until zero starts flashing and then remains displayed without flashing.
D
About 3 seconds
E-47
Count of the Days You Attained Your Daily Step Count Goal (GOAL)
xThe day count value is incremented each time you attain your daily step count goal
(GOAL).
xIf you change your daily step goal to a greater value after you attain a previous daily
step goal, the watch will still count the current day as successfully attaining your
daily step goal (based on the previous value).
xIf, before you reach your daily step goal, you change it to a value that is less than
the current goal value, the day will remain counted as successful attainment of your
step goal.
xTo return to the Timekeeping Mode, press C.
E-46
xWeekly data is the total number of steps from Monday through Sunday.
xThe second hand and a displayed value show what percent of your weekly goals
you have attained.
−The maximum displayed step goal progress is 999%. 999% will remain
displayed even if the step count reaches 1,000% or greater.
−The second hand indicates the step goal progress in units of 2%. It points to
GOAL when the step goal progress is 100% or greater.
xThe GOAL indicator appears on the display when you attained your daily step
count goal.
xTo return to the Timekeeping Mode, normally press C. If the data of three
weeks ago is displayed, press Dto return to the Timekeeping Mode.
E-45
Last week 3 weeks ago
GOAL indicator
Two seconds Two seconds
Alternates
every two
seconds
Alternates
every two
seconds
D
E-44
Weekly data
This week
D
Alternates every
two secondsTwo seconds
Weekly step goal progress (%)
E-43E-42
xAfter you set a daily step goal, the second hand and a displayed value will show
what percent of your daily and weekly goals you have attained.
−The maximum displayed step goal progress is 999%. 999% will remain
displayed even if the step count reaches 1,000% or greater.
−The second hand indicates the step goal progress in units of 2%. It points to
GOAL when the step goal progress is 100% or greater.
xThe GOAL indicator appears on the display when you attained your daily step
count goal.
xTo return to the Timekeeping Mode, normally press C. If the data of seven days
ago is displayed, press Dto return to the Timekeeping Mode.
E-41
1 day ago 7 days ago
GOAL indicator
Two seconds Two seconds
Alternates
every two
seconds
Alternates
every two
seconds
D
E-40
3. You can use Dto view past daily and weekly data as shown below.
Daily data
Example: Today’s data
Step count: 7,235; Daily step goal: 8,000; Step goal progress: 90%
Today
D
Alternates every
two secondsTwo seconds
Daily step goal progress (%)

Operation Guide 5540
E-59
To configure the countdown timer
1. Hold down Afor about two seconds until the minute
digits of the start time start to flash.
xPress Cto toggle the flashing between the minutes
and seconds.
xIf the countdown start time is not displayed, use the
procedure under “To perform a countdown timer
operation” (page E-60) to display it.
2. 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.
3. Press Ato exit the setting mode.
E-58
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-13.
Seconds
Minutes
E-57
Alternates every
two seconds
Alternates every
two seconds
A
LAP indicator
LAP number
xRecording a lap time while there are already 30 records in memory will cause
the oldest record (LAP01) to be deleted automatically to make room for the
new record. For example, if you record 40 lap times, the lap numbers will be
displayed as LAP11 through LAP40 (30 records).
E-56
To recall lap data
1. While the Stopwatch Mode screen is reset to all zeros, press A.
This displays the lap time record for Lap 1.
2. Use Ato scroll through the lap time records and find the one you want.
xThe display alternates between a lap record number (LAP01 to LAP30) and its
lap time.
xThe second hand points to REC while lap time records are being recalled.
E-55
xThe current lap time will remain displayed for about eight seconds after Ais
pressed. After that, the display returns to elapsed time.
xEach press of Arecords the current lap time. Memory can hold up to 30 lap time
records.
xRecording a lap time while there are 30 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.
xResetting the stopwatch to all zeros and starting a new elapsed time measurement
operation causes all current lap time records to be deleted.
Note
xThe Stopwatch Mode can indicate elapsed time up to 23 hours, 59minutes,
59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-54
To perform lap time measurement
DA A ...... D A
Start Lap (LAP1) Lap (LAP2) Stop Reset
Alternates every
two seconds
Alternates every
two seconds
A
LAP indicator LAP time
E-53
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
Use Cto select the Stopwatch Mode as shown on page E-12.
To perform an elapsed time operation
DD D D A
Start Stop (Resume) (Stop) Reset
E-52
Using the Stopwatch
The stopwatch measures elapsed time and lap times,
and recall lap times. Up to 30 lap times can be stored
in memory.
xAfter the elapsed time reaches one hour, the display
units change to hours, minutes, and seconds, and time
is measured in one-second increments.
Seconds
Minutes
Measurement in progress
1/100 seconds
E-51
4. Press Dto toggle Step Reminder between on and off.
D
Step Reminder Off Step Reminder On
5. Press Ato exit the setting operation.
To clear the flashing “STEP!!” notification
1. You can clear the flashing STEP!! notification by pressing A, C, or D.
The STEP!! notification will flash until you reach the prescribed step count or
until power saving activates. If power saving is deactivated within one hour after
activating, the notification will start flashing again.
E-50
To turn Step Reminder on or off
1. In the Timekeeping Mode, press D.
xThis displays DATA and then the daily data history
screen.
2. Hold down Auntil the current daily step goal setting
starts to flash (about two seconds).
3. Use Cto move the flashing to the Step Reminder
setting.

Operation Guide 5540
E-69
Illumination
The face of the watch is illuminated for easy reading in the dark.
To illuminate the face
In any mode (except a setting mode), press Bto illuminate the face.
Illumination Precautions
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.
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.
E-68
D
At least two seconds
Dual time Timekeeping Mode time
Note
xThe above operation swaps the times only. Dates are not swapped.
E-67
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.
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.
E-66
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.
E-65
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-13.
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
Minutes
Hour
E-64
Alarm indicator Hourly time signal indicator
Alarm ON/OFF
To stop the alarm
Press any button.
E-63
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use Dto select an alarm or the Hourly Time Signal.
xEach press of Dcycles 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.
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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.
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-61
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-13.
To set an alarm time
1. Press Dto display the setting (–1 through –5, or )
you want to change.
–1
D
–2
D
–3
DD
D–5 D–4
E-60
To perform a countdown timer operation
D D D D A
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 Ato reset to the countdown start time.
To stop the alarm
Press any button.

Operation Guide 5540
E-79
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
Pedometer:
Step count using a 3-axis accelerometer
Step count display range: 0 to 999,999
Step indicators
Step count history screen
Daily data, weekly data, goal attainment count
Step goal progress
Step Count Graph
E-78
Main Indicators
Number Name See
1
1
Step indicators E-27
2
2
LAP indicator E-57
3
3
PM indicator E-17
4
4
STEPS mark E-29
5
5
Alarm indicator E-64
6
6
GOAL indicator E-41, E-45
7
7
Hourly time signal indicator E-64
8
8
DST indicator E-22
9
9
Hands shifted indicator E-15
86 97
1 2 4
5
3
E-77
Battery
■“R” is flashing on the digital display.
This happens when battery power is low or after the light or some other function
is turned on repeatedly over a short amount of time, which temporarily runs down
the battery. All functions other than timekeeping are disabled while Ris flashing on
the display.
If Rremains on the display or if it keeps appearing, it may indicate that the battery
needs to be replaced.
Request battery replacement by your original retailer or authorized CASIO service
center.
E-76
■The step count does not increase.
The step count is not displayed at the beginning of a walk in order to avoid
miscounting of non-walking movements. It appears only after you have continued
walking for about 10 seconds, with the number of steps you took during that time
added to the total.
■“ERR” appears on the display while I use the watch.
Subjecting the watch to strong impact can cause sensor malfunction or improper
contact of internal circuitry. When this happens, ERR (error) will appear on the
display and sensor operations will be disabled.
xIf the message does not disappear after about three minutes or if it keeps
appearing, it may indicate sensor malfunction. Contact your original retailer or
CASIO service center.
■History data was deleted.
Battery replacement will cause step count history data to be deleted.
E-75
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-18) to change
the standard time/daylight saving time (DST) setting.
Pedometer
■Step count is not correct.
If the band is loose, the pedometer will count steps but step count accuracy may
be reduced.
For details, see “Pedometer Precautions” (page E-23).
E-74
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 and 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-19).
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-73
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
E-72
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-71
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.
Note
xYou do not need to perform the operation below as long as the analog hands
indicate the same time as the digital display.
E-70
2. Press Cnine times to display the illumination duration
setting screen (page E-19).
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.

Operation Guide 5540
E-82
Power Supply: One lithium battery (Type: CR2016)
Approximate battery operating time: 2 years under the following conditions:
x1 illumination operation (1.5 seconds) per day
xAlarm: 10 seconds/day
xPedometer: 12 hours/day
Frequent use of illumination runs down the battery.
Specifications are subject to change without notice.
E-81
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, Dual Time/Home
Time swapping
Illumination: LED (light-emitting diode); Selectable illumination duration
(approximately 1.5 seconds or 3 seconds)
Other: Alarm test; Button operation tone on/off; Moving the Hands to View the
Digital Display
E-80
Step count reset
Auto reset at midnight each day
Manual reset
Daily step goal setting
Step count setting unit: 1,000 steps
Step count setting range: 1,000 to 50,000
Goal attainment notification
Step Reminder
Step count accuracy: ±3% (According to vibration testing)
Power saving function
Stopwatch:
Measuring unit: 1/100 second (1 second after 1 hour)
Measuring capacity: 23 hours 59 minutes, 59 seconds
Measuring modes: Elapsed time, Lap time, Last measurement sessions lap data
(up to 30 records)
Lap time record recall