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Operation Guide 3153

6

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.

Level

1

2

3

4

5

Battery Power Indicator

(Charge Soon Alert)

Function Status

All functions enabled.

All functions enabled.

Illumination and beeper
disabled.

Except for timekeeping and
the 

C

 (charge) indicator, all

functions and display
indicators disabled.

All functions disabled.

Battery power
indicator

ll

ll

lll

ll

ll

l l l l l l l l

ll

ll

ll

ll

ll

ll

ll

l l

ll

ll

ll

l l l ll

ll

c

The flashing 

LOW

 indicator at Level 3 tells you that battery power is very

low, and that exposure to bright light for charging is required as soon as
possible.

At Level 5, all functions are disabled and settings return to their initial
factory defaults. Once the battery reaches Level 2 after falling to Level 5,
reconfigure the current time, date, and other settings.

The watch’s Home City code setting will change automatically to 

TYO

(Tokyo) whenever the battery drops to Level 5. With this Home City code
setting, the watch is configured to receive the time calibration signals of
Japan. If you are using the watch in North America, Europe, or China you
will need to change the Home City code setting to match your location
whenever the battery drops to Level 5.

Display indicators reappear as soon as the battery is charged from Level 5
to Level 2.

Leaving the watch exposed to direct sunlight or some other very strong light
source can cause the battery power indicator to show a reading temporarily
that is higher than the actual battery level. The correct battery level should
be indicated after a few minutes.

Performing illumination, or beeper operations
during a short period may cause 
(recover) to appear on the display. Illumination,
alarm, countdown timer alarm, and hourly time
signal will be disabled until battery power
recovers.
After some time, battery power will recover and

 

(recover) will disappear, indicating that

the above functions are enabled again.

If 

 

(recover) appears frequently, it probably means that remaining

battery power is low. Leave the watch in bright light to allow it to charge.

l l l

ll

ll

ll

ll

ll

ll

l l

l l l

l l

Recover indicator

Charging Precautions

Certain charging conditions can cause the watch to become very hot. Avoid
leaving the watch in the areas described below whenever charging its
rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid
crystal display to black out. The appearance of the LCD should become
normal again when the watch returns to a lower temperature.

Warning!
Leaving the watch in bright light to charge its rechargeable battery can
cause it to become quite hot. Take care when handling the watch to
avoid burn injury. The watch can become particularly hot when exposed
to the following conditions for long periods.

On the dashboard of a car parked in direct sunlight

Too close to an incandescent lamp

Under direct sunlight

Charging Guide

After a full charge, timekeeping remains enabled for up to about seven months.

The following table shows the amount of time the watch needs to be
exposed to light each day in order to generate enough power for normal
daily operations.

Since these are the specs, we can include all the technical details.

Watch not exposed to light

Internal timekeeping

Display on 18 hours per day,sleep state 6 hours per day

1 illumination operation(1.5 second) per day

10 seconds of alarm operation per day

Measurement of 26 Rally Mode stages per month

Stable operation is promoted by frequent exposure to light.

Exposure Level (Brightness)

Outdoor Sunlight (50,000 lux)

Sunlight Through a Window (10,000 lux)

Daylight Through a Window on a Cloudy Day (5,000 lux)

Indoor Fluorescent Lighting (500 lux)

Approximate

Exposure Time

5 minutes

24 minutes

48 minutes

8 hours

Recovery Times

The table below shows the amount exposure that is required to take the
battery from one level to the next.

The above exposure time values are all for reference only. Actual required
exposure times depend on lighting conditions.

Approximate Exposure Time

Level 5

Level 4

Level 3

Level 2

Level 1

2 hours

28 hours

8 hours

6 hours

139 hours

39 hours

12 hours

283 hours

78 hours

127 hours

- - - - - - - -

- - - - - - - -

Exposure Level
(Brightness)

Outdoor Sunlight
(50,000 lux)

Sunlight Through a
Window (10,000 lux)

Daylight Through a
Window on a Cloudy
Day (5,000 lux)

Indoor Fluorescent
Lighting (500 lux)

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.

Graphic Area

The information shown in the graphic area depends on the current mode.

Mode

Timekeeping Mode
Rally Mode

Recall Mode
World Time Mode
Alarm Mode
Stopwatch Mode
CountdownTimer
Mode

Graphic Area

Timekeeping Mode seconds
Target time number/Measurement
time 1/10 seconds during
measurement
Record number
Timekeeping Mode seconds
No indication
Stopwatch Mode 1/10 seconds
CountdownTimer Mode seconds

Graphic Area

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.

Even if you turn off the button operation tone,
the alarms, the Hourly Time Signal, the
countdown alarm, and Rally Mode auto start all
operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the display), hold down 

C

to toggle the button operation tone on (  not displayed) and off (  displayed).

Holding down 

C

 to turn the button operation tone on or off also causes the

watch’s current mode to change.

The   indicator is displayed in all modes when the button operation tone is
turned off.

Power Saving Function

When turned on, the Power Saving function
enters a sleep state automatically whenever the
watch is left in an area for a certain period where
it is dark. The table below shows how watch
functions are affected by the Power Saving
function.

Elapsed Time

in Dark

60 to 70 minutes

6 or 7 days

Display

Blank, with Power Saving
indicator (

PS

) flashing

Blank, with Power Saving
indicator (

PS

) not flashing

Operation

All functions enabled, except
for the display
Beeper tone, illumination,
and display are disabled.

Wearing the watch inside the sleeve of clothing can cause it to enter the
sleep state.

The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If
the watch is already in the sleep state when 6:00 AM arrives, however, it
will remain in the sleep state.

Power saving indicator

To recover from the sleep state

Perform any one of the following operations.

Move the watch to a well-lit area.

Press any button.

Angle the watch towards your face for reading.

Summary of Contents for 3153

Page 1: ... it means that the watch s Power Saving function has turned off the display to conserve power See Power Saving Function for more information About This Manual 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 Button operati...

Page 2: ... up to 99 hours 59 minutes 59 9 seconds If the time exceeds this timing reverts to zero and continues from there Before Starting Measurement The watch comes with 10 preset target times link times which you can use as is or change to the value you want You can use the B button to select the target time you want while the current target time is reset to its initial value LT 01 0 10 LT 07 1 30 LT 02 ...

Page 3: ... time Measurement time Hour Minutes Measurement date Month Day A A Total measured time Hour digits screen Total measured time TTL When the total measured time is in the range of zero to 2999 hours 59 minutes 57 seconds Minute digits screen Switches automatically at two second intervals Switches automatically at two second intervals To correct recorded times You can use the procedure below to corre...

Page 4: ... on the alarm automatically 3 Press C to move the flashing in the sequence shown below to select other settings Hour Minutes Month Day 5 Press A to exit the setting screen Screen To do this Change the hour and minutes Change the month and day Do this Use D and B With the 12 hour format set the time correctly as a m or p m P indicator To set an alarm that does not include a month and or day set for...

Page 5: ...tting between 1 5 seconds and 3 seconds 4 Press A to exit the setting screen l l l l l l l l l l lll 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 ...

Page 6: ...specs we can include all the technical details Watch not exposed to light Internal timekeeping Display on 18 hours per day sleep state 6 hours per day 1 illumination operation 1 5 second per day 10 seconds of alarm operation per day Measurement of 26 Rally Mode stages per month Stable operation is promoted by frequent exposure to light Exposure Level Brightness Outdoor Sunlight 50 000 lux Sunlight...

Page 7: ... 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 after a preset amount of time 1 5 or 3 seconds 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 ...

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