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Battery Power Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery's power.
Battery power indicator
Battery Power
Level
Indicator
1
2
3
4
(Charge Soon Alert)
5
The flashing
indicator at Level 4 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. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the current time, date, and all other settings after the
battery is recharged to Level 3 from Level 5. Though the time appears on the display
after the battery is charged to Level 4, you will not be able to change the time setting
until the battery reaches Level 3.
Leaving the watch in direct sunlight or some other very strong light source can
cause the battery power indicator to temporarily show a reading that is higher than
the actual battery level. The correct battery power indicator should appear after a
few minutes.
If you use the backlight or any of the alarm functions a number of times during a
short period, RECOVER appears on the display and the following operations
become disabled until battery power recovers.
Backlight
Beeper tone
After some time, battery power will recover and RECOVER will disappear, indicating
that the above functions are enabled again.
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 nine months, while
the watch is used under the conditions described below.
Operating Conditions
Watch is not exposed to light
Display on 18 hours per day, sleep state 6 hours per day
1 backlight operation (1.5 seconds) per day
10 seconds of alarm operation per day
One minute of stopwatch operation with pacer signal (pacer value: 120) every two
days
1 countdown timer operation per day
Charge Times
Exposing the watch to light for the periods shown below each day restores the power
used by the above operating conditions.
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)
Stable operation is promoted by frequent charging.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Level 5
Outdoor Sunlight (50,000 lux)
65 minutes
Sunlight Through a Window
4 hours
(10,000 lux)
Daylight Through a Window
7 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
60 hours
(500 lux)
The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
USER'S GUIDE 2535
Function Status
All functions enabled.
All functions enabled.
All functions enabled.
Beeper tone, backlight,
display, and buttons are
disabled.
All functions, including
timekeeping, are disabled.
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Approximate Exposure Time
Level 4
Level 3
Level 2
Level 1
18 hours
4 hours
98 hours
19 hours
– – –
– – –
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.
Power Saving Function
When turned on, the Power Saving function automatically
puts the watch into a sleep state whenever it is left in an
area where it is dark for 30 to 35 minutes. The sleep state
is indicated by a blank screen with SLEEP flashing on it.
In the sleep state, all functions are enabled, except for the
display.
Wearing watch inside the sleeve of clothing can cause it
to enter the sleep state.
To recover from the sleep state
Perform any one of the following operations.
Move the watch to a well-lit area. It can take up to five seconds for the display to turn
on.
Press any button.
Angle the watch towards your face for reading.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down B until the
seconds start to flash, which indicates the setting
screen.
2. Press C seven times until the Power Saving on/off
screen appears.
3. Press D to toggle Power Saving on (ON) and off
(OFF).
4. Press B to exit the setting screen.
The Power Saving on indicator (SAVE) is on the display
in all modes while the Power Saving is turned on.
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 automatically saves any settings you have made
up to that point and exits the setting screen.
Initial Screens
When you enter the Alarm Mode, the screen you were viewing when you last exited
the mode appears first.
Data and Setting Scrolling
The A 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 automatically makes allowances for
different month lengths and leap years. Once you set the date, there should be no
reason to change it except when battery power drops to Level 5.
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 A to start 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.
Number of Logs
Memory Capacity
Currently in Memory
1
61 Records
2
5
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.
Lap/Split Time Record Capacity
61 records – 1 log title screen = 60
61 records – 2 log title screens = 59
61 records – 5 log title screens = 56
4
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