About Charging; How To Charge The Watch; Standard Charging Time; About Energy - Seiko 3B51 Instructions Manual

ABOUT CHARGING
■ How To Charge the Watch
Expose the dial to light to charge the watch.
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To ensure optimal performance of the watch, make sure
that the watch is kept suffi ciently charged at all time.
※ W hen 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.)
※ W hen fi rst using the watch or starting to use the watch after it has stopped because of the
energy depletion, suffi ciently charge the watch referring to the table on the page at the right.
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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.
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If the energy depletion forewarning function is activated, charge the watch
suffi ciently.
How to Charge the Watch ･･･････ page 98
Standard Charging Time ･････････ page 99
※ Neither the buttons nor the crown can be operated while the second hand moves at two-second or fi ve-second intervals (this
is not a malfunction).
※ While the second hand moves at fi ve-second intervals, the hour and minute hands, stop operating.
※ While the second hand moves at fi ve-second intervals, the watch is unable to receive radio signals automatically. After the
watch is charged suffi ciently 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
page 91.)
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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.
■ Standard Charging Time
For an approximate time required to charge the watch, refer to the table below.
Illumination Light Condition
1 x (LUX) source (Example)
500 Incandescent light 60W 60cm
700 Fluorescent light General offi ces
1000 Fluorescent light 30W 70cm
3000 Fluorescent light 30W 20cm
5000 Fluorescent light 30W 12cm
Fluorescent light 30W 5cm
10000
Sunlight Cloudy day
Sunny day
100000 Sunlight
(Under the direct sunlight on a summer day)
The fi gures 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 suffi cient charging time.
※ The second hand movement indicates the remaining amount of energy.
"CHECKING THE CHARGING STATUS BY THE MOVEMENT OF THE SECOND HAND" page 88
※ The required charging time slightly varies depending on the model of the watch.
■ Power Save Function
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
When the watch is exposed to a state without receiving
Condition
an adequate light source for 72 hours or longer.
The second hand stops
pointing at the 15-second
position, and the hour and
minute hands also stop.
Situation
The watch conducts
automatic radio signal
receiving.
How to handle When the watch i s exposed to an adequate l i g ht source for fi ve seconds or l o nger,
the situation i t di s pl a ys the current ti m e agai n after the second hand i s rapi d l y advanced.
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 suffi ciently charging the battery, set the current time by receiving a radio signal. (Refer to Automatic Reception and Manual Reception → page 91)
Time required for fully Ti m e requi r ed for chargi n g the watch to Ti m e requi r ed for chargi n g
charging the watch start movi n g at one- second i n terval s the watch to run for one day
− − 7 hours
− − 5 hours
− 15 hours 4 hours
130 hours 5 hours 1.5 hours
80 hours 2 hours 45 minutes
40 hours 1 hour 15 minutes
15 hours 30 minutes 3 minutes
Power Save 2
When the watch is in an insuffi cient
charging state for a long time.
The second hand stops pointing
at the 45-second position, and
the hour and minute hands also
stop.
The watch does not conduct
automatic radio signal receiving.
After suffi ciently charging the battery, set
the watch for the current time, if necessary.
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