This watch is equipped with a power save function which can suppress energy consumption
when it is left without receiving an adequate light source for a certain length of time.
※ There are two types of power save mode.
Power Save 1
Power Save 2
Condition When the watch is exposed to a state without receiving
an adequate light source for 72 hours or longer.
When the watch is in an insufficient
charging state for a long time.
Situation
The second hand
stops pointing at the
15-second position,
and the hour and
minute hands, and
date also stop.
The watch conducts
a u t o m a t i c r a d i o
signal receiving.
T h e s e c o n d h a n d
stops pointing at the
45-second position,
and the hour and
minute hands, and
date also stop.
The watch does not
conduct automatic
radio signal receiving.
How to handle
the situation
When the watch is exposed to an adequate light source for five seconds or longer,
it displays the current time again after the second hand is rapidly advanced.
After sufficiently charging the battery, set
the watch for the current time, if necessary.
Power Save 2
※ While the watch is being charged, the second hand moves at Five-second Intervals.
During the Five-second Interval Movement, neither the buttons nor the crown can be operated.
※ If the Power Save 2 mode is prolonged, the stored power amount drops and the internal current time information stored will be lost.
When the watch returns to its normal movement of one-second interval after sufficiently charging the battery, set the current time by
receiving a radio signal. (Refer to Automatic Reception and Manual Reception → P.101)
■ Power Save Function
S
o
la
r C
h
a
rg
in
g
F
u
n
c
tio
n
4
115
About Energy
■ Energy Depletion Forewarning Function
The energy depletion forewarning function is activated when the
energy stored in the watch runs low. In such a case, the second hand
moves at two-second intervals. If the watch continues to be in the
state of two-second interval movement, the watch switches to five-
second interval movement, followed by a completely stopped state.
If the energy depletion forewarning function is activated, charge the
watch sufficiently.
How to Charge the Watch ··························· P.112
Standard Charging Time ······························ P.113
※ Neither the buttons nor the crown can be operated while the second hand moves at two-second or
five-second intervals (this is not a malfunction).
※ While the second hand moves at five-second intervals, the hour hand and date stop operating.
※ While the second hand moves at two-second and five-second intervals, the watch is unable to
receive radio signals automatically. After the watch is charged sufficiently and the second hand
returns to normal one-second interval movement, conduct the manual reception of radio signals to
set the watch to the correct time. (Refer to Automatic Reception and Manual Reception on P.101.)
S
o
la
r C
h
a
rg
in
g
F
u
n
c
tio
n
4
114
Illumination
lx (LUX)
Light
source
Condition
(Example)
From the state where the
watch is stopped (not charged)
In the state where the hand
moves (the watch is charged)
To fully
charged
To 1sec Interval
movement is secured
To move for
1day
700 Fluorescent light General offices
−
−
5 h
3,000 Fluorescent light
30W 20cm
200 h
5 h
1.5 h
10,000
Fluorescent light
30W 5cm
60 h
1 h
15 min
Sunlight
Cloudy day
100,000
Sunlight
Sunny day (Under
the direct sunlight
on a summer day)
24 h
30 min
3 min
The figures of Time required for charging the watch to start moving at one- second intervals are
estimations of time required to charge the stopped watch by exposing it to light until it moves at
steady one-second intervals. Even if the watch is partially charged for a shorter period, the watch
will resume one-second- interval movement. However, it may shortly return to two-second-interval
movement. Use the charging time in this column as a rough guide for sufficient charging time.
※ The second hand movement indicates the remaining amount of energy.
"CHECKING THE CHARGING STATUS BY THE MOVEMENT OF THE SECOND HAND" P.98
※ The required charging time slightly varies depending on the model of the watch.
■ Standard Charging Time
For an approximate time required to charge the watch, refer to the table below.
S
o
la
r C
h
a
rg
in
g
F
u
n
c
tio
n
4
113
■ How To Charge the Watch
ABOUT CHARGING
Expose the dial to light to charge the watch.
※ When charging the watch, make sure that the watch is not heated to a high temperature. (The
operational temperature range is between −10 ºC and + 60 ºC.)
※ When first using the watch or starting to use the watch after it has stopped because of the
energy depletion, sufficiently charge the watch referring to the table on the page at the right.
To ensure optimal performance of the watch, make sure
that the watch is kept sufficiently charged at all time.
Under the following situations, the energy of the watch is
likely to be depleted, resulting in stoppage of the watch.
・The watch is concealed under a sleeve.
・The watch is used or stored under conditions where it cannot be exposed to light for a long time.
S
o
la
r
C
h
a
rg
in
g
F
u
n
c
tio
n
4
112
