Casio W752 User Manual

							Operation Guide 2925
1
MO0410-EA
About This  Manual
•Button operations are indicated using the letters shown
in the illustration.
•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.
(Light)
Stopwatch Mode




Dual Time  Mode Alarm  Mode Countdown Timer  ModeRecall Mode





Press C.
General Guide•Press C to change from mode to mode.
•In any mode, press L to illuminate the display.


Timekeeping Mode
TimekeepingUse the Timekeeping Mode to set and view the current
time and date.
To set the time and date1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Day of weekMonth – Day
HourSeconds12/24-Hour 
For mat
DayMonthYe a r
Minutes
  Hour : Minutes
Seconds PM indicatorYear
4. Press A to exit the setting screen.
•The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all modes.
•The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
SettingSecondsHour, Minutes
12/24-Hour
Format
Year, Month, Day
Button OperationPress D to reset to 00.Use D (+) and B (–) to change the setting.
Press D to toggle between 12-hour (12H) and
24-hour (24H) timekeeping.
Use D (+) and B (–) to change the setting.
Screen
3. When the setting you want to change is flashing, use D and B to change it as
described below.
StopwatchThe 1/100-second stopwatch can measure elapsed time
and lap/split times. The stopwatch uses the basic data you
input and a pacer signal to calculate the distance you
cover while jogging or running. Stopwatch times and your
distance are also stored in memory.
•The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
•Exiting the Stopwatch Mode while a lap/split time is
frozen on the display clears the lap/split time and returns
to elapsed time measurement.
•Stopwatch measurements are performed in the
Stopwatch Mode, which you enter by pressing C.
Timekeeping Mode time1/100 second Seconds
Hours
Minutes Remaining memory
How the Stopwatch WorksThere are two ways you can use the stopwatch: to measure elapsed time and lap/split
times like a standard stopwatch (see “To measure times with the stopwatch”), and to
keep track of the distance you cover while jogging or running. In order to use the
stopwatch to keep track of distance, you must first perform the steps listed below.
1. Set your basic data. See “Basic Data”.
2. Turn on the pacer signal. See “To turn the pacer signal on and off”.
Note
•In order to obtain accurate distance calculations, you must set accurate basic data
and keep your exercise pace in accordance with the pacer signal emitted by the
watch.
•See “How Stopwatch Data is Stored” for information about the type of data the watch
stores in memory when you use the stopwatch.
•Use the Recall Mode to view data stored in memory.
•You can view distance covered data only by recalling it in the Recall Mode. It does
not appear on the Stopwatch Mode screen.
To measure times with the stopwatch
Note
•Pressing D to perform a lap/split time operation freezes the lap/split time at that
point on the display for about eight seconds. After that, the display returns to normal
stopwatch time measurement.
•During a stopwatch time measurement operation, the upper part of the display
shows the current lap/split number and the hour digit, the center part shows the
current split time, and the lower part shows the current lap time.
•When the pacer signal is turned on, it sounds for the first 30 seconds after you start
a stopwatch time measurement operation. After that, the pacer signal sounds for 30
seconds whenever you press A.
➤ ➤ ➤ ➤
Clear Next Lap/
Split➤
BStart Stop
Elapsed Time
Re-start ClearBStopBBD
Lap/Split Times
BStart Lap/SplitDStopDB➤D➤➤
•If the pacer signal does not sound even though you have it turned on, press A to
change the positions of the lap time and split time on the display. This should cause
the pacer signal to sound.
Selecting the Stopwatch Screen Format
The following shows how you can control the position of the lap time and split time on
the stopwatch screen.
•The Lap/Split indicator uses arrows to indicate the location the lap time and split
(elapsed) time.
Lap/Split number
Split
time
Lap time
➤➤
Split timeMore than 10 hours Press A.
Lap time HoursMinutesSeconds
Lap/Split
indicator
•When you first start a stopwatch operation by pressing B, both the center part and
the lower part of the display show minutes, seconds, and 1/100 second. Whenever
the time shown in the lower part of the display is greater than 60 minutes, the display
format changes to show hours, minutes, and seconds. Whenever the time in the
center part of the display is greater than 10 hours, the display format changes to
show hours, minutes, and seconds.
Basic DataThe term “basic data” refers to the pacer signal setup, and information about your
stride length.
Important!
•You cannot change basic data settings while a Stopwatch Mode time measurement
operation is in progress. Stopwatch operation must be stopped and the Stopwatch
screen must be cleared to all zeros before you can change basic data settings.
•Whenever you want to change the stride length unit, you must first reset the
Cumulative Total screen to zero. See “To reset the cumulative total screen” for
information about how to do this.
•Be sure to update basic data values whenever the person using the watch changes.
Pacer Signal
The pacer signal of this watch beeps in accordance with a pacer value (rate) set by
you. You can use the pacer signal to maintain a constant pace while jogging or
running. You can also turn off the pacer signal when you do not want to use it.
•The pacer value you set specifies the number of beeps per minute.
•Turning on the pacer signal causes the watch to beep at the rate specified by the
pacer value.
•You can set a pacer value in the range of 100 to 200 beats per minute, in units of 5.
•You can disable the pacer function by setting a pacer value of xxx. While the pacer
value is set to xxx, the watch does not calculate distance covered. 
						

							Operation Guide 2925
2
Stride Length
You can specify either centimeters (XM) or inches (Yn) as the stride length unit. The
unit you specify for the stride length unit also determines the unit of measurement
used for the distance value in the Stopwatch Mode and Recall Mode, as shown below.
Setting Range40 to 190 cm
16 to 76 inSetting Increment5 cm
2 inDistance UnitKilometers (km)
Miles (mi)
•The following examples illustrate how you can calculate values for this setting.239 steps required to run around a 300-meter track.
300 (meters) ÷ 239 (steps) = 1.255 (approximately 125 cm)
239 steps required to run around a 330-yard track.
330 (yards) 
÷ 239 (steps) × 36 = 49.70 (approximately 50 inches)
Stride Length UnitCentimeters (XM)
Inches (Yn)
To configure your basic data1. While the Stopwatch Mode screen shows all zeros
(0H000000), hold down A until the pacer value
appears flashing on the display. This indicates the
setting screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
3. When the setting you want to change is flashing, use D and B to change it as
described below.
Stride length unit
Pacer valuePacer signal
Stride length
|||||||||||||||
Setting
Pacer value
Pacer signal
Stride length
Stride length unit
ScreenButton Operations
Use D (+) and B (–) to change the setting.
•Selecting xxx disables the pacer signal.
Press D to toggle the pacer signal on (ON)
and off (OFF).
Use D (+) and B (–) to change the setting.
Press D to toggle between centimeters (XM)
and inches (Yn).
•When the pacer signal is turned on, the pacer signal sounds in accordance with the
pacer value while the pacer signal or pacer value setting screen is on the display.
4. Press A to exit the setting screen.
•If you find that the stride length unit won’t change, reset the cumulative total to all
zeros.
To turn the pacer signal on and off1. While the Stopwatch Mode screen shows all zeros
(0H000000), hold down A until the pacer value
appears flashing on the display. This indicates the
setting screen.
2. Press C once to display the pacer signal setting
screen.
3. Press D to toggle the pacer signal on (ON) and off
(OFF).
•A pacer signal on indicator (
) appears when this
setting is turned on.
4. Press A to exit the setting screen.
|||||||||||||||
Recall ModeUse the Recall Mode to recall and delete records stored
by the Stopwatch Mode.
•Stopwatch records are stored in “logs” that are created
automatically by the watch. See “Memory Management”
for more information.
•The title screen of the newest log appears first whenever
you enter the Recall Mode.
•Log numbers are automatically assigned in sequence,
starting from 01.
•All of the operations in this section are performed in the
Recall Mode, which you enter by pressing C.
To recall stopwatch recordsIn the Recall Mode, use A to scroll through the log title
screens, starting from the newest one, as shown below.
When the title screen of the log you want is displayed, use
D and B to cycle through the records contained in the log.
Distance covered
Log numberCreation date
(Month – Day)
Log Title  Screen
•The cumulative total screen shows the total distance since the last cumulative total
distance reset.
Press B.






Press D.
Split timeLap/Split numberBEST indicator



Cumulative Total  Screen


Press A.
Log Title
ScreenStopwatch Record
ScreenBest Lap Time
Screen
Lap time




•The locations of the lap time and split time (middle or bottom of the display) in the
Stopwatch Record screen are determined by the display format you last selected in
the Stopwatch Mode.
•The BEST indicator identifies the record that contains the best lap time in the log.
•If a best lap time record is deleted automatically when the log becomes full, the
BEST indicator will not be transferred to the record with the next best lap time. See
“Memory Management” for more information about automatic deletion of records.•The unit of measurement used for the distance calculation depends on the unit you
select for your stride length as shown in the table below. See “To configure your
basic data” for more information.
Selected Stride Unit Distance UnitXM (centimeters)km (kilometers)
Yn (inches)mi (miles)
To delete a log1. In the Recall Mode, display the title screen of the log you want to delete.
•See “To reset the cumulative total screen” below for information about what
happens when you select the cumulative total screen here.
2. Hold down B and D until the watch beeps and 
CLR stops flashing on the
display.
•This deletes the log and all the records inside it. Deleting a log does not change the
cumulative total distance value.
To reset the cumulative total screen1. In the Recall Mode, display the cumulative total screen.
2. Hold down B and D until the watch beeps and CLR stops flashing on the
display.
•This resets the cumulative total distance to zero, without deleting any logs or
records. A new cumulative total will start with the next stopwatch operation you
perform.
Countdown TimerYou can set the countdown timer within a range of one
minute to 100 hours. An alarm sounds when the
countdown reaches zero.
•You can also select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
•Countdown timer functions are available in the
Countdown Timer Mode, which you can enter using C.
To set the countdown start time1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the hour
setting of the countdown start time starts to flash, which
indicates the setting screen.
HoursMinutesSeconds
Timekeeping Mode time
•If the countdown start time is not displayed, use the procedure under “To use the
countdown timer” to diplay it.
2. Press C to move the flashing between the hour and minute settings.
3. Use D (+) and B (–) to change the flashing item.
•To set the starting value of the countdown time to 100 hours, set 0:00.
4. Press A to exit the setting screen.
To use the countdown timerPress B while in the Countdown Timer Mode to start the countdown timer.
•When the end of the countdown is reached and auto-repeat is turned off, the alarm
sounds for 10 seconds or until you stop it by pressing any button. The countdown
time is automatically reset to its starting value when the alarm sounds.
•Press B while a countdown operation is in progress to pause it. Press B again to
resume the countdown.
•To completely stop a countdown operation, first pause it (by pressing B), and then
press D. This returns the countdown time to its starting value.
To turn auto-repeat on and offWhile the countdown start time is displayed on the
Countdown Timer Mode screen, hold down D for about
two seconds to toggle auto-repeat on (
 displayed) and
off ( not displayed).
•When auto-repeat is turned on, the alarm sounds and
countdown starts again whenever the countdown
reaches zero. You can stop the countdown by pressing
B, and manually reset to the countdown star t time by
pressing D.
•Auto-repeat timing repeats up to seven times.
AlarmsYou can set five independent Daily Alarms. When an
alarm is turned on, the alarm tone sounds when the alarm
time is reached. One of the alarms can be configured as a
snooze alarm or a one-time alarm, while the other four are
one-time alarms.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
•There are five alarm screens numbered 1 through 5.
The hourly time signal screen is indicated by :00.
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.Alarm numberAlarm time
(Hour : Minutes)
Timekeeping Mode timeTo set an alarm time1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
•You can configure Alarm 1 as a snooze alarm or a one-time alarm. Alarms 2
through 5 can be used as one-time alarms only.
•The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down A until the hour setting of the alarm time
star ts to flash. This indicates the setting screen.
3. Press C to move the flashing between the hour and minute settings.
4. While a setting is flashing, use D (+) and B (–) to change it.
x3
x4
x1x2
:00x5
•When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press A to exit the setting screen. 
						

							Operation Guide 2925
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Alarm OperationThe alarm sounds at the preset time for about 10 seconds. In the case of the snooze
alarm, the alarm operation is performed a total of seven times, every five minutes, until
you turn the alarm off or change it to a one-time alarm.
Note
•Pressing any button stops the alarm tone operation.
•Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Displaying the Alarm1 setting screen
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn Alarms 2 22 2
2 through 5 55 5
5 on and off1. In the Alarm Mode, use D to select a one-time alarm
(alarm number 2 through 5).
2. Press B to toggle the displayed alarm on and off.
•Turning on a one-time alarm (2 through 5) displays the
alarm on indicator on its screen.
•The alarm on indicator is displayed in all modes.
•If any alarm is on, the alarm on indicator is shown on
the display in all modes.
Alarm on indicator
To select the operation of Alarm1 11 1
11. In the Alarm Mode, use D to select Alarm1.
2. Press B to cycle through the available settings in the sequence shown below.
•The applicable alarm on indicator (
 or ) is displayed in all modes when an
alarm is turned on.
•The snooze alarm on indicator (
) flashes during the 5-minute intervals between
alarms.
•Displaying the Alarm 1 setting screen while the snooze alarm is turned on
automatically turns off the snooze alarm (making Alarm1 a one-time alarm).
Snooze alarm on indicator and alarm on indicator
One-time alarm on Snooze alarm on Alarm off
To turn the hourly time signal on and off1. In the Alarm Mode, use D to select the Hourly Time
Signal.
2. Press B to toggle the displayed item on and off.
•Turning on the Hourly Time Signal displays the hourly
time signal on indicator on its screen.
•The hourly time signal on indicator is displayed in all
modes.Hourly time signal
on indicator
Dual TimeThe Dual Time Mode lets you keep track of time in a
different time zone.
•The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time1. Press C to enter the Dual Time Mode.
2. Use A, B, and D to set the Dual Time Mode time.
•Each press of D (+) and B (–) changes the time
setting in 30-minute increments.
•Pressing A sets the Dual Time Mode to the same time
as the Timekeeping Mode.
Dual time
(Hour : Minutes  Seconds)
Timekeeping Mode time
IlluminationThe display of the watch is illuminated by an LED (light-
emitting diode) and a light guide panel for easy reading in
the dark. The watch’s auto light switch automatically turns
on illumination when you angle the watch towards your
face.
•The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
•See “Illumination Precautions” for other important
information about using illumination.
To turn on illumination manuallyIn any mode, press L to illuminate the display for about
one second.
•The above operation turns on illumination regardless of
the current auto light switch setting.
Auto light switch
on indicator
About the Auto Light SwitchTurning on 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 at more than 40 degrees causes illumination to turn on.
•Wear the watch on the outside of your wist.
Parallel to
groundMore than
40°Warning!
•Always make sure you are in a safe place whenever you are reading the
display 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.
•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 offIn the Timekeeping Mode, hold down D for about two seconds to toggle the auto light
switch on (auto light switch on indicator displayed) and off (auto light switch on
indicator not displayed).
•In order to protect against runnning down the battery, the auto light switch will turn
off automatically approximately six hours after you turn it on. Repeat the above
procedure to turn the auto light switch back on if you want.
•The auto light switch on indicator is on the display in all modes while the auto light
switch is turned on.
ReferenceThis section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return FeatureIf you do not perform any operation for two or three minutes while a setting screen
(one with flashing digits) is displayed, the watch will automatically exit the setting
screen.
Initial ScreensWhen you enter the Alarm Mode, the screen you were viewing when you last exited
the mode appears first.
Data and Setting ScrollingThe B and D buttons are used in various modes and setting screens 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.
Timekeeping•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.
•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 no 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 year can be set in the range of 2000 to 2039.
•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.
Stopwatch•You can use lap time measurement to time how long it takes to complete a specific
portion (such as a single lap) of a race.
•You can use split time measurement to time how long it takes to get from the start to
a specific point in a race.
Memory Management
Each time you press B to star t a new elapsed time or lap/split operation in the
Stopwatch Mode, the watch automatically creates a new “log” in its memory. The log
remains open for data storage until you permanently close it by pressing D to clear
the stopwatch to all zeros.
•The watch has enough memory to hold up to 61 records. Since each log title screen
uses up one record of memory space, the maximum number of lap/split time records
you can store depends on how many logs there are currently in memory, as shown
below.
•The watch also calculates the cumulative total distance for all stopwatch operations
since the last time the cumulative total distance was reset. The cumulative total does
not affect memory capacity.
•If watch memory is already full when you perform a stopwatch button operation that
creates a new log, the oldest log in memory and all of its records are deleted
automatically to make room for the new log.
•If you are adding records to the only log in memory and watch memory becomes
full, adding another record causes the oldest record in the log to be deleted
automatically to make room for the new record.
•If you are adding records to a log when there are multiple logs in memory and watch
memory becomes full, adding another record causes the oldest log in memory and
all of its records to be deleted automatically to make room for new records.Number of Logs
Currently in Memory12
5 Memory Capacity61 RecordsLap/Split Time Record Capacity61 records – 1 log title screen = 6061 records – 2 log title screens = 59
61 records – 5 log title screens = 56
Stopwatch Button Operation
B Start (from all zeros)
B Stop
B Re-start
D Lap/Split
D Clear
Data Store Operation
Creates a new log: current date and distance
(updated as timing progresses)
Time measurement stops, without storing data in
memory.
Time measurement re-starts, without storing
data in memory.Creates new record: displayed lap/split times
Creates new record: displayed lap/split times
(Stopwatch display is cleared to all zeros.)
How Stopwatch Data is Stored
The following table describes how data is stored when you perform the various button
operations described under “To measure times with the stopwatch”. 
						

							Operation Guide 2925
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Illumination Precautions•Illumination may be hard to see when viewed under direct sunlight.
•Illumination automatically turns off whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
Auto light switch precautions
•Wearing 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
display. To avoid running down the battery, turn off the auto light switch whenever
engaging in activities that might cause frequent illumination of the display.
•Illumination 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.
•Illumination turns off in about one second, even if you
keep the watch pointed towards your face.
•Static 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 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, illumination may not turn on until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the auto light switch.
•You 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.
More than 15 degrees
too high