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Operation Guide 2615 3015
• The flashing CHARGE (Module 2615)/CHG (Module 3015) 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 4, 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 time and date, after the battery reaches Level 3
(indicated by flashing CHARGE/CHG indicator) from Level 4. You will not be able to
set any of the other settings until the battery reaches Level 2 (no CHARGE/CHG
indicator) after dropping to Level 4.
• 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/RECOV 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/RECOV 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 12 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.
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)
• Since these are the specs, we can include all the technical details.
• 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
• 1 countdown timer operation per day
• 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
Approximate Exposure Time
(Brightness)
Level 4
Outdoor Sunlight (50,000 lux)
90 minutes
Sunlight Through a Window
6 hours
(10,000 lux)
Daylight Through a Window
11 hours
on a Cloudy Day (5,000 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
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 for a
certain period in an area where it is dark. The table
below shows how watch functions are affected by the
Power Saving function.
Module 2615
Elapsed Time in Dark
60 to 70 minutes
6 or 7 days
Module 3015
• Wearing 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 10:59 PM. If the
watch is already in the sleep state when 6:00 AM arrives, however, it will remain in
the sleep state.
• The watch will not enter the sleep state while it is in the Countdown Timer Mode or
Stopwatch Mode.
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.
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Level 3
Level 2
Level 1
25 hours
7 hours
126 hours
35 hours
– – –
Display
Operation
Blank, with
Display is off, but all
P. SAVE/PS
functions are enabled.
flashing
Blank, with
All functions are
P. SAVE/PS not
disabled, but timekeeping
flashing
is maintained.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting screen.
2. Press C eight times until the Power Saving on/off
screen appears.
3. Press D to toggle Power Saving on (ON) and off (OF).
4. Press A to exit the setting screen.
• The Power Saving on indicator (P.SAVE/PS) is on the
display in all modes while the Power Saving is turned on.
Auto Return Feature
• If you leave the watch in the Telememo or Alarm Mode for two or three minutes
without performing any operation, it automatically changes to the Timekeeping
Mode.
• 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 Telememo, World Time, or Alarm Mode, the data you were
viewing when you last exited the mode appears first.
Data and Setting Scrolling
The 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 A (AM) 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 when battery power drops to Level 4.
World Time
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
• The GMT differential is the time difference between the time zone where the city is
located and Greenwich Mean Time.
• GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC) data.
Backlight Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• The backlight automatically turns off whenever an alarm sounds.
• Frequent use of the backlight runs down the battery.
Auto light switch precautions
• Wearing the watch on the inside of your wrist, as well as movement or vibration of
your arm can cause the auto light switch to activate and illuminate 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.
• The backlight may not light if the face of the watch is
More than 15 degrees
more than 15 degrees above or below parallel. Make
too high
sure that the back of your hand is parallel to the ground.
• The backlight 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 the backlight
does not light, 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, the backlight may not light until about one second after you
turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.
• 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.
Sort Table
I
1
(space)
10
19
A
J
2
11
20
B
K
3
12
21
C
L
4
13
22
D
M
5
14
23
6
E
15
N
24
7
F
16
O
25
8
G
17
P
26
H
Q
9
18
27
R
0
9
28
37
S
1
-
29
38
T
2
.
30
39
U
3
:
31
40
V
4
/
32
41
W
33
5
X
34
6
Y
35
7
Z
8
36
4
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