Casio 5510 User manual

Operation Guide 5510
E-9
To set the digital time and date
1. In the Timekeeping Mode, hold down Auntil the
seconds start to flash, which indicates the setting
screen.
2. Press Cto move the flashing in the sequence shown
below to select other settings.
Seconds
Day
DST Hour
Month
Minutes
Year
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Seconds
E-8
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date. This watch features separate digital and
analog timekeeping. The procedures for setting the digital
time (page E-9) and analog time (page E-13) are different.
Setting the Digital Time and Date
Use the Timekeeping Mode to set and view a digital
display of the current time and date. When setting the
digital time, you also can configure settings for the
summer time (Daylight Saving Time or DST).
PM indicator
Minutes
Seconds
Month – Day
Day of week
Hours
E-7
Recall Mode
Dual Time Mode
Countdown Timer
Mode
Alarm Mode
C
C
C
E-6
General Guide
•Press Cto change from mode to mode.
•In any mode (except when a setting screen is on the display), press Bto illuminate
the face of the watch.
Stopwatch Mode
C
C
Hand Setting Mode
Timekeeping Mode C
C
E-5
Illumination ……………………………………………………………………………E-41
To illuminate the display manually ……………………………………………E-41
To specify the illumination duration……………………………………………E-42
To turn the auto light switch on and off ………………………………………E-44
Reference ………………………………………………………………………………E-45
To turn the button operation tone on and off…………………………………E-46
Specifications …………………………………………………………………………E-51
E-4
Recall Mode ……………………………………………………………………………E-24
To recall stopwatch time records………………………………………………E-25
To delete a log …………………………………………………………………E-27
Countdown Timer………………………………………………………………………E-28
To use the countdown timer……………………………………………………E-29
To configure countdown start time and auto-repeat settings ………………E-30
Alarms……………………………………………………………………………………E-32
To set an alarm time ……………………………………………………………E-34
To test the alarm ………………………………………………………………E-36
To select the operation of Alarm ……………………………………………E-37
To turn Alarms and on and off ……………………………………………E-38
To turn the hourly time signal on and off ……………………………………E-38
Dual Time ………………………………………………………………………………E-39
To set the Dual Time……………………………………………………………E-39
E-3
Contents
General Guide ………………………………………………………………………… E-6
Timekeeping …………………………………………………………………………… E-8
To set the digital time and date ……………………………………………… E-9
To toggle between 12-hour and 24-hour timekeeping………………………E-11
To toggle the Timekeeping Mode digital time between DST and
Standard Time ………………………………………………………………E-12
To adjust the analog time ………………………………………………………E-13
Stopwatch ………………………………………………………………………………E-15
To measure elapsed time………………………………………………………E-18
To measure elapsed time with lap times ……………………………………E-19
To measure elapsed time with split times ……………………………………E-20
E-2
•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.
E-1
About This Manual
•Button operations are indicated using the letters shown
in the illustration.
•Depending 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.
•Note 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.
MO1612-EA © 2016 CASIO COMPUTER CO., LTD.

Operation Guide 5510
E-19
To measure elapsed time with lap times
1. When the stopwatch display shows all zeros, press
Ato display the lap time screen (indicated by /LAP).
2. Press Dto start an elapsed time measurement.
•At the time, both the upper and lower displays will
show identical times.
3. Press Ato record the time of the first lap.
•This freezes the current lap time in the upper part of
the digital display for about eight seconds, while
measurement of total elapsed time and the next lap
time continue internally. The lap number of the
displayed time appears in the lower digital display.
•After eight seconds, the ongoing elapsed time
measurement re-appears in the lower digital display.
4. Repeat step 3 to record more lap times.
5. Press Dto stop the stopwatch.
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Lap time
Elapsed time
E-18
More than 10 hours
More than one hour
Minutes
Seconds
1/100 second Hours
Minutes
Seconds
Minutes
Hours
Seconds
1/100 second Hours
Minutes
Seconds
To measure elapsed time
Note
•You can perform the following steps starting from either the lap time screen or the
split time screen.
1. Press Dto start the stopwatch.
2. Press Dagain to stop the stopwatch.
•You can resume the measurement operation by pressing D.
3. Press Ato clear the stopwatch to all zeros.
E-17
•See “To measure elapsed time with lap times” (page E-19) and “To measure elapsed
time with split times” (page E-20) for more information about each type of measurement.
•You can perform elapsed time measurement starting from either the lap time screen
or the split time screen (page E-19 and E-20). Whenever you enter the Stopwatch Mode,
the screen (lap time or split time) that was displayed when you last exited the mode
will appear first.
•During a stopwatch elapsed time operation, the upper display initially shows
minutes, seconds, and a 1/100-second value. This changes to hours, minutes, and
seconds when the time in the upper display exceeds 60 minutes.
•The lower display initially shows hours, minutes, seconds, and a 1/100-second
value. This changes to hours, minutes, and seconds when the time in the lower
display exceeds 10 hours.
E-16
•The stopwatch measurement operation continues even if you exit the Stopwatch
Mode.
•For information about how stopwatch times are stored in memory, see “Memory
Management” (page E-22).
Viewing the Stopwatch Digital Displays
The information that appears in the watch’s upper and lower digital displays depends
on whether you are measuring lap times or split times.
Lap Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time
Split Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time (Split time appears here for eight seconds as it is stored
in memory.)
E-15
Stopwatch
The stopwatch lets you measure elapsed time, lap times,
and split times. Lap times and split times can be stored in
memory.
•The display range of the stopwatch is 99 hours,
59 minutes, 59 seconds.
•All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C
(page E-6).
Note
•“Lap time” is the time spent to cover a specific segment
of a race, such as one lap around a track. “Split time” is
the time spent from the beginning of a race up to a
certain point.
•The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
Minutes
Seconds
1/100
second
Hours
Remaining
free records
E-14
•High-speed hand movement will stop automatically after the time advances 12
hours or if an alarm (daily alarm, Hourly Time Signal, or countdown beeper) starts
to sound.
4. Press Ato exit the setting screen.
•The minute hand will be adjusted slightly to match the seconds when you exit the
setting screen.
•To return to the Timekeeping Mode, press C.
E-13
Setting the Analog Time
Perform the procedure below when the time indicated by the analog hands does not
match the time of the digital display.
To adjust the analog time
1. In the Timekeeping Mode, press Csix times to enter
the Hand Setting Mode (page E-6).
2. Hold down Auntil the current digital time starts to
flash, which indicates the setting screen.
3. Use Dto adjust the analog setting.
•Press Donce to advance the hands 20 seconds.
•Hold down Dto advance the hands at high speed.
•To lock high speed hands movement, hold down Dto start it and then press B
to lock. The hands will continue to advance for one 12-hour cycle or until you
press any button to stop them.
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E-12
Daylight Saving Time (DST) Setting
Daylight 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 toggle the Timekeeping Mode digital time between DST and Standard Time
1. In the Timekeeping Mode, hold down Auntil the
seconds start to flash, which indicates the setting
screen.
2. Press Conce and the DST setting screen appears.
3. Press Dto toggle between Daylight Saving Time (
displayed) and Standard Time ( displayed).
4. Press Ato exit the setting screen.
•The DST indicator appears on the Timekeeping,
Alarm, and Hand Setting Mode screens to indicate
that Daylight Saving Time is turned on.
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On/Off status
DST indicator
E-11
4. Press Ato exit the setting screen.
•The day of the week is displayed automatically in accordance with the date
(year, month, and day) settings.
•See “Daylight Saving Time (DST) Setting” below for details about the DST setting.
To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press Dto toggle between 12-hour timekeeping and
24-hour timekeeping.
•With the 12-hour format, the P(PM) indicator appears to the left of the hour digits
for times in the range of noon to 11:59 p.m. and the A(AM) indicator appears to the
left of the hour digits 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 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
•The Aand Pindicators are not displayed with the Timekeeping Mode time on the
Countdown Timer Mode and Dual Time Mode screens.
E-10
3. When the setting you want to change is flashing, use Dand Bto change it as
described below.
Screen: To do this: Do this:
Reset the seconds to Press D.
Toggle between Daylight Saving Time
() and Standard Time ( ) Press D.
Change the hour or minute Use D(+) and B(–).
Change the year, month, or day Use D(+) and B(–).

Operation Guide 5510
E-29
To use the countdown timer
Press Dwhile 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 reset automatically to its starting value after the alarm stops.
•When auto-repeat is turned on, the countdown will restart automatically without
pausing when it reaches zero. The alarm sounds when the countdown reaches
zero.
•The countdown timer measurement operation continues even if you exit the
Countdown Timer Mode.
•Press Dwhile a countdown operation is in progress to pause it. Press Dagain to
resume the countdown.
•To stop a countdown operation completely, first pause it (by pressing D), and then
press A. This returns the countdown time to its starting value.
E-28
Countdown Timer
You can set the countdown timer within a range of one
minute to 24 hours. An alarm sounds when the countdown
reaches zero.
•You also can select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
•All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C(page E-7).
Seconds
Hours
Minutes
Timekeeping Mode time
Auto-repeat
on indicator
E-27
To delete a log
1. In the Recall Mode, display the title screen of the log you want to delete.
2. Hold down Band Duntil stops flashing on the display.
•This deletes the log and all the records inside it.
•Deleting a single log slides all newer logs (ones with higher log numbers)
upwards to fill the empty space. This cause the log numbers of all the newer logs
to be reduced by 1. If there are six logs currently in memory (numbered 01
through 06) and you delete log 03, the numbers of logs that previously were
numbered 04, 05, and 06 will change to 03, 04, and 05.
E-26
Press D.
Lap number
Split number
Log number
Log Title Screen
First record Last record
Lap time
Split time
•Whether you will be able to view lap time records or split time records will depend
on the screen you selected in step 2, above.
E-25
To recall stopwatch time records
1. In the Stopwatch Mode, check to make sure that the displays are reset to all zeros
(page E-19).
•If all zeros are not displayed, reset the stopwatch.
2. Use the Abutton to select either the lap time screen (to view lap time records) or
the split time screen (to view split time records) (page E-19 and E-20).
•To convert a lap time saved in the Stopwatch Mode to a split time, select the split
time screen.
3. Press the Cbutton to enter the Recall Mode.
4. Use the Abutton to scroll through the log title screens from the newest to the
oldest until the title screen of the log whose records you want to view is displayed.
5. Press Dto scroll through the records contained in the log you selected in step 4,
from the oldest to the newest.
E-24
Recall Mode
Use the Recall Mode to recall and delete logs and records
you stored in the Stopwatch Mode. You can use the
Recall Mode to view both lap and split time records.
•When you enter the Recall Mode, the newest log
recorded in the Stopwatch Mode will appear first. If
there are no logs in memory, appears on the
display.
•You can use the Recall Mode to check memory data
even while a stopwatch elapsed time measurement
operation is in progress. However, the time data that is
currently being measured will not appear in the Recall
Mode.
•You can convert a lap time saved in the Stopwatch
Mode to a split time (page E-25).
Day of week
Month – Day
Log number
Log Title Screen
E-23
How stopwatch data is stored
The following table shows how stopwatch data is stored when you perform stopwatch
button operations.
Stopwatch Button Operation Data Storage Description
From all-zeros, press Dto start. Creates a new log. Stores the date the button was
pressed, and the new log number.
Press Ato display lap/split time.
Creates a new record with each button operation. Stores
the lap and split times and total elapsed time at each
point the button is pressed.
Press Dto stop elapsed time
measurrement and then press A
to reset.
Resets the elapsed time to all zeros without recording
data.
•See “Recall Mode” (page E-24) for details on how to recall time records from memory.
E-22
Memory Management
A new log is created each time you press Din the Stopwatch Mode to start a new
elapsed time measurement operation. A log contains a log title screen, and records of
all the lap or split times you record during the current elapsed time measurement
operation.
•The capacity of the watch’s memory is 60 records.
•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.
E-21
3. Press Ato record the time of the first split.
•The current split time appears in the lower display for
about eight seconds, as the total elapsed time, next
lap time, and next split time continue to be timed
internally by the watch. The split number of the
displayed time appears in the upper display.
•After eight seconds, the ongoing lap time
measurement appears in the upper display and the
ongoing elapsed time measurement appears in the
lower display.
4. Repeat step 3 to record more split times.
5. Press Dto stop the stopwatch.
6. Press Ato clear the stopwatch to all zeros.
•Split numbers are incremented automatically starting from 1whenever you press
Ain step 3 of the above procedure. The maximum split number is 99.
Recording a split time after that causes the split number count to restart from 00.
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Split time
Split number
Split Time Recording
(Displayed for eight
seconds after Ais pressed.)
E-20
6. Press Ato clear the stopwatch to all zeros.
•Lap numbers are incremented automatically starting
from 1whenever you press Ain step 3 of the above
procedure. The maximum lap number is 99.
Recording a lap after that causes the lap number
count to restart from 00.
To measure elapsed time with split times
1. When the stopwatch display shows all zeros, press A
to display the split time screen (indicated by /SPL).
2. Press Dto start an elapsed time measurement.
•At the time, both the upper and lower displays will
show identical times.
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Lap time
Lap number
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Lap time
Elapsed time

Operation Guide 5510
E-39
Dual Time
The Dual Time Mode lets you keep track of time in a
different time zone. You can select Standard Time or
Daylight Saving Time for the Dual Time.
•The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time
1. Press Cto enter the Dual Time Mode (page E-7).
2. In the Dual Time Mode, hold down Auntil the DST
setting starts to flash, which indicates the setting
screen.
3. Press Cto move the flashing in the sequence shown
below to select the other setttings.
DST MinutesHour
Dual time
(Hour : Minutes Seconds)
Timekeeping Mode time
E-38
To turn Alarms and on and off
1. In the Alarm Mode, use Dto select a one-time alarm
(alarm number or ).
2. Press Ato toggle the displayed alarm on and off.
•Turning on a one-time alarm ( or ) 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.
To turn the hourly time signal on and off
1. In the Alarm Mode, use Dto select the Hourly Time
Signal.
2. Press Ato 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.
Alarm on indicator
Hourly time signal on
indicator
E-37
To select the operation of Alarm
1. In the Alarm Mode, use Dto select Alarm .
2. Press Ato cycle through the available settings in the sequence shown below.
One-time alarm on Snooze alarm on Alarm off
•The applicable alarm on indicator is displayed in all modes when an alarm is turned
on.
•The snooze indicator flashes during the 5-minute intervals between alarms.
•Displaying the Alarm setting screen (page E-34) while the snooze alarm is turned on
turns off the snooze alarm automatically (making Alarm a one-time alarm).
E-36
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 (page E-9)
Displaying the Alarm setting screen (page E-34)
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
E-35
4. While a setting is flashing, use D(+) and B(–) to change it.
•To set an alarm that does not include a month (daily alarm, monthly alarm), set
for the month. Use Dand Buntil the mark appears (between 12 and 1) while
month setting is flashing.
•To set an alarm that does not include a day (daily alarm, 1-month alarm), set
for the day. Use Dand Buntil the mark appears (between the end of the
month and 1) while the day setting is flashing.
•When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (Aindicator) or p.m. (Pindicator).
5. Press Ato exit the setting screen.
Alarm Operation
The 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 (page E-37).
•Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
E-34
To set an alarm time
1. In the Alarm Mode, use Dto scroll through the alarm
screens until the one whose time you want to set is
displayed.
•You can configure Alarm as a snooze alarm or a one-time alarm. Alarms and
can be used as one-time alarms only.
•The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down Auntil the hour setting of the alarm time
starts to flash. This indicates the setting screen.
•This operation turns on the alarm automatically.
3. Press Cto move the flashing in the sequence shown below to select other settings.
Hour Minutes Month Day
E-33
Alarm Types
The alarm type is determined by the settings you make, as described below.
•Daily alarm
Set the hour and minutes for the alarm time. This type of setting causes the alarm to
sound everyday at the time you set.
•Date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting causes
the alarm to sound at the specific time, on the specific date you set.
•1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at time you set, only during the month you set.
•Monthly alarm
Set the day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound every month at the time you set, on the day you set.
E-32
Alarms
You can set up to three independent multi-function alarms
with hour, minutes, month, and day. 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 two are
one-time alarms.
You also can turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
•There are three alarm screens numbered through .
The hourly time signal screen is indicated by .
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C(page E-7).
Alarm time
(Hour : Minutes)
Alarm number
Alarm date
(Month – Day)
E-31
3. Perform the following operations, depending on which setting currently is selected
on the display.
•While the start time setting is flashing, use D(+) and B(–) to change it.
•Set to specify 24 hours.
•While the auto-repeat on/off setting ( or ) is flashing on the display, press D
to toggle auto-repeat on ( ) and off ( ).
4. Press Ato exit the setting screen.
•The auto-repeat on indicator ( ) is displayed on the Countdown Timer Mode
screen while this function is turned on.
•Frequent use of auto-repeat and the alarm can run down battery power.
E-30
To configure countdown start time and auto-repeat settings
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down Auntil the hour
setting of the countdown start time starts to flash, which
indicates the setting screen.
•If the countdown start time is not displayed, use the
procedure under “To use the countdown timer” (page
E-29) to display it.
2. Press Cto move the flashing in the sequence shown
below, and select the setting you want to change.
Start Time
(Hours)
Start Time
(Minutes)
Auto-Repeat
On/Off
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Auto-repeat
on indicator
On/Off status

Operation Guide 5510
E-49
Auto light switch precautions
•Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light
switch to operate when it is not needed, which shortens battery life. If you want to
wear the watch on the inside of your wrist, turn off the auto light switch feature.
•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 1.5 seconds or 3
seconds, even if you keep the watch pointed towards
your face.
More than 15 degrees
too high
E-48
Illumination Precautions
•Illumination may be hard to see when viewed under direct sunlight.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
E-47
Scrolling
The Band Dbuttons 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 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 without changing the minutes.
•The year can be set in the range of 2000 to 2099.
•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.
E-46
Button Operation Tone
The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.
•The multi-function alarms and Countdown Timer Mode
alarm will sound even if the button operation tone is
turned off.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the display), hold down Cto toggle
the button operation tone on (mute indicator not displayed) and off (mute indicator
displayed).
•Holding down Cto turn the button operation tone on or off also causes the watch’s
current mode to change.
•The mute indicator is displayed in all modes when the button operation tone is
turned off.
Mute indicator
E-45
Reference
This 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 Feature
•If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch saves any settings you have made up
to that point and exits the setting screen automatically.
•The watch will change to the Timekeeping Mode automatically if you do not perform
any operation in the Recall Mode, Alarm Mode, or Hand Setting Mode for two or
three minutes.
E-44
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 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 off
In the Timekeeping Mode, hold down Bfor about three seconds to toggle the auto
light switch on (auto light switch on indicator (LT)displayed) and off (auto light switch
on indicator (LT) not displayed).
•The auto light switch on indicator (LT) remains in all modes while the auto light
switch is turned on.
•In order to protect against running 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.
E-43
About the Auto Light Switch
Turning 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 more than 40 degrees causes illumination to turn on.
•Wear the watch on the outside of your wrist.
Parallel to
ground More than
40°
E-42
•You can use the procedure below to select either 1.5 seconds or 3 seconds as the
illumination duration. When you press B, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current illumination duration setting.
To specify the illumination duration
1. In the Timekeeping Mode, hold down Auntil the
seconds start to flash, which indicates the setting
screen.
2. While the seconds are flashing, press Bto toggle the
illumination duration between 1.5 seconds ( ) and 3
seconds ( ).
3. Press Ato exit the setting screen.
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E-41
Illumination
An LED (light-emitting diode) illuminates the face of the
watch for easy reading in the dark. The watch’s auto light
switch turns on illumination automatically 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” on page E-48 for other
important information about using illumination.
To illuminate the display manually
In any mode (except when a setting screen is on the
display), press Bto illuminate the face of the watch.
•The above operation turns on illumination regardless of
the current auto light switch setting.
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Auto light switch on
indicator
E-40
4. When the setting you want to change is flashing, use Band Dto change it as
described below.
Screen: To do this: Do this:
Toggle between Daylight Saving Time
( ) and Standard Time ( ) Press D.
Change the hour or minutes Use D(+) and B(–).
5. Press Ato exit the setting screen.
•The DST indicator on the Dual Time Mode screen indicates that DST is turned on
for the Dual Time Mode time.
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Operation Guide 5510
E-53
Battery: One lithium battery (Type: CR1220)
Approximate Battery Life: 3 years on type CR1220
(10 seconds of alarm operation per day, one illumination operation (1.5 seconds)
per day)
Frequent use of the light shortens the battery life.
Specifications are subject to change without notice.
E-52
Memory Capacity: 60 records (used for lap times and split times)
Other: Lap/split numbers
Countdown Timer:
Measuring unit: one second
Input range: one minute to 24 hours (1-minute increments and 1-hour increments)
Other: Auto-repeat timing
Alarms: 3 Multi-function*alarms (Two one-time alarms; one snooze/one-time alarm);
Hourly Time Signal
*Alarm type: Daily alarm, Date alarm, 1-month alarm, Monthly alarm
Dual Time: Hour, minutes, seconds, a.m. (A)/p.m. (P)
Other: Daylight Saving Time (summer time)/Standard Time
Illumination: LED (light-emitting diode); Auto Light Switch; selectable illumination
duration (approximately 1.5 seconds or 3 seconds)
Other: Button operation tone on/off
E-51
Specifications
Accuracy at normal temperature: ± 30 seconds a month
Digital Timekeeping: Hour, minutes, seconds, a.m. (A)/ 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: Daylight Saving Time (summer time)/Standard Time
Analog Timekeeping: Hour, minutes (hand moves every 20 seconds)
Stopwatch:
Measurement Capacity: 99 hours, 59 minutes, 59 seconds
Measurement Units: Depends on range.
Lap Times: 1/100 second from 00:00 00 to 00:59 59.99; 1 second from 1:00 00
to 99:59 59
Split Times: 1/100 second from 00:00 00 to 09:59 59.99; 1 second from 10:00 00
to 99:59 59
Measurement Types: Elapsed time, lap times, split times
E-50
•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 toward you again. If
this does not work, drop your arm all the way down so it hangs at your side, and
then bring it back up again.
•Under certain conditions, 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.