Manual time adjustment (To set only the time)
7
The watch can be set to the precise current time of the currently set time zone.
(The time zone is not changed.)
Manual time adjustment
How to manually adjust the time
Continue to press Button B (3 sec),
and then release it when the second
hand moves to the 0-sec position.
1 2
When the second hand
points to “Y” or “N,”
reception is completed.
Direct the watch face
upward and wait 4
Move to the
outdoors
under an
open sky with
good visibility
where GPS
signals can
be easily
received.
When the second hand has
reached the 0-sec position,
reception is started.
The indicator hand points to “1.”
Check that the reception is
successful after the watch
returns to the time display
mode.
When the time is not correct
even if “Y” is displayed, the
time zone may not correspond
to the region where you are.
Check the time zone setting.
The reception result is
displayed for 5 seconds.
Then, the hour and minute
hands move, and the time
and date are adjusted.
※
While the indicator hand points to
“E” or , reception is not started
even with operation for reception.
When the hand points to “E,”
charge the watch by expose to
light.
When the hand points to , reset
the in-ight mode（ ）
<Display during reception>
The second hand indicates ease of
receiving (= number of GPS satellites
from which GPS signals are received).
※
To acquire only time info rmation,
the number of satellites neces sary
for reception is one.
Number of
acquired satellites
１ ０
Display
BPC
J
J
Y
BPC
JJY
State Easy to
receive
Cannot
receive
Reception
result display
Y:
Successful
N:
Failed
Display
B
PC
JJY
B
PC
JJY
※
To cancel the
reception,
press Button
A.
It takes up to 1 min to
complete reception.
※The reception time depends on
the reception conditions.
3
How to set the sub-dial
8
・The sub-dial displays
the time in a 24-hour
system.
・Even when the time
zone of the dial is
changed, the time
of the sub-dial is not
changed.
The sub-dial moves
independently from the
dial.
Unlock the crown
Pull out the crown to
the rst click
Push the crown back in
Press Button B or Button C
to set the time
1
2 43
Unlock the crown
Turn the crown
counterclockwise
(downward) to unscrew
it. Now the crown can
be operated.
Crown
locked
Crown
unlocked
The watch enters the
time setting mode of the
sub-dial.
( Hands on the main-dial
keep moving.)
Operation has been
completed.
※ Lock the crown
While pressing the
crown in
Screw
Turn the crown clockwise
(upward) while gently
pressing it in toward the
watch body until it stops.
How to set the sub-dial
Unscrew
When the
button
is kept
pr e ss e d
for 2 se conds or longer,
the sub-dial hour/minute
hands will s tart to move
continuously, and when
it is pres sed again, they
stop moving.
How to manually set the time
9
Unlock the crown
Pull out the crown to
the second click
Push the crown back (in
simultaneously with a
time signal)
Continue to press Button A (3
seconds)and then release it when the
hand moves to the 0-second position
Press Button B or
Button C to set the time
1
2
53 4
Unlock the crown
The second hand moves
to the 13-second position
and stops.
Operation has been
completed.
The watch resumes its
normal movement.
The second hand moves to
stop at the 0-second
position.
The watch enters the
manual time setting mode.
・
When using the watch again under a condition in which the watch is able to receive GPS signals, receive GPS signals to set the time.
・When adjusting the time, the date will be accordingly adjusted.
How to manually set the time
※
Even if GPS signals cannot be re ceived, the watch can be u sed with the same accur acy as a normal quartz wa tch. (at loss/gain ±15 seconds p er month on average)
※ If the watch receives GPS sig nals after manual time se tting, it displays the rec eived time.
Unscrew
※ Lock the crown.
While pressing the
crown in
Screw
※ When the watch enters
the manual ti me setting
mode, the reception
result will be displayed as
“N,” since th e reception
results data will be lost.
When the button
is kept pressed
for 2 seconds or
longer, the hour/
minute hands will
start to move
continuously,
and when it is
pres sed a ga in,
they stop moving.
※ The hands will not mov e
by turning the crown.
※ The point in which the
date chang es is at
0:00 AM (12:00 P M).
Set the time taking into
consideration AM or PM.
How to manually set the date
10
How to manually set the date
Precautions on the setting the date manually
Please refrain from doing this operation except where GPS signals cannot be received because this
watch can be set to the precise current time and calendar by automatically receiving GPS signals. It
may cause the preliminary position of this watch misaligned.
※
When the date is not correct eve n
when the wa tch has successfully
received GPS signals, the
preliminary position of the da te may
be misaligned.
→
BASIC MANUA L「Adjust the
preliminary posi tions of the
date, indicator hand and hour/
minute hands」
P.55 〜 56
When the date is not auto-
matically changed under a
condition in which the watch is
unable to receive GPS signals
(when changing from months with
30 days or less to months with
31 days), set the date manually.
・
The date can be set independently
regardless of the time.
・
When using the watch again under
a condition in which the watch
is able to receive GPS signals,
receive GPS signals to set the
time and date.
→ 5 How to adjust the time zone.
Unlock the crown
1
Unlock the crown
Unscrew
Push the crown back in
Pull out the crown to
the second click
Press Button B or Button C
to set the date
42 3
Operation has been
completed.
The second hand moves
to the 13-second position
and stops.
When the button
is kept pressed
for 2 seconds or
longer, the date
will start to move
continuously.
Press the button
again to stop.
※ When the watch ent ers
the manual time set ting
mode, the reception result
will be displayed as “N,”
since the reception results
data will be lost.
※ The date will not move by
turning the crown.
※ During movement of the
date, the b uttons cann ot
be operated.
※ Lock the crown.
While pressing the
crown in
Screw
Instructions for Receiving Leap Second Data on Seiko Astron GPS Solar Watch
11
Thank you for purchasing a Seiko Ast ron Watch.
This watch ent ers the “leap second data” receiving mode a fter the rst GPS signal is r eceived on or
after December 1st and June 1st.
It is conducted every six months whethe r the leap second data is put in to eect o r not. Th is process
occurs automatic ally so no special op eration is required fro m the use r. The proces s of rec eiving the
leap second data takes longer than the regular time adjustment. Be sure to complete receiving the leap
second data in an environment w here a GPS signal can be recei ved, such as outdoors.
※When the second hand points to the one-second position, it is indicating that one minute is required before the
watch begins receiving the le ap second data. At this time , it is recommended that y ou remain in an environmen t
where a GPS signal can be recei ved, such as outdoors .
※Please refrain from butt on operation while the wa tch is in the data receivi ng mode.
For details, please read the Basic Manual (P.18).
About Leap Second
The leap second is to compensate for deviations from the “Universal Time”( UT) which is astronomically
determined and the “International Atomic T ime”(TAI). 1 second may be added (delete d) once a year or
every few years at the end of June or D ecember.
The watch will repeatedly enter the “leap second data” receiving mode until the process is successfully
completed. During this time, no time adjustment will take place. In the event that the attempt to receive
leap second data is unsuccessful, indicated by position N (not successful), it is recommended you move to
a place where a GPS signal can be easily received, such as outdoors, and complete the process of receiving
time data and then leap second data through a GPS signal by pressing and holding button B for 3 seconds.
The process of receiving leap second data
Although this movement is die rent from the normal time d isplay, it is not an indication that the wa tch is defective.