Seiko ASTRON Handy Manual

13 14
Time Zone Adjustment
Go to a place where
GPS signals can be
easily received
1
Move to the outdoors
under an open sky
with good visibility.
The time zone where you are is localized to adjust the watch to the precise current time
by just one button operation

anywhere in the world.
 DST (Daylight Saving Time) can be set manually.
6
How to adjust the time zone
Time zone adjustment
Precautions on time zone adjustment
If the time zone is adjusted near a time zone boundary, the time of the adjacent time zone may be displayed.
In some areas the boundaries observed by the watch may not exactly correlate to the actual time zone markers on the land.
This does not indicate a malfunction. In this case, set the time zone in the manual time zone setting mode.
When the time zone is adjusted while traveling on land, avoid time zone boundaries to carry out time zone adjustment in
the representative cities in the time zone whenever possible. In addition, when the watch is used near time zone boundaries,
make sure to check the time zone setting, and manually set the time zone as necessary.
Continue to press Button A (6 seconds),
and then release it when the second hand
moves to the 30-second position.
2
 Although the second hand moves to the
0-second position 3 seconds after pressing
Button A, continue to press it.
When the second hand has reached
the 30-second position, reception is
started.
The indicator hand points to “4+.”
 While the indicator hand points to “low” or ,
reception is not started even with operation
for reception.
When the hand points to “low,” charge the
watch by exposing it to light.
Check whether the watch is able/unable to
receive GPS signals
When the hand points to , reset the in-
flight mode ( ).
Press for
6 seconds
3
Direct the watch face upward and
wait
<
Display during reception (= satellites
acquisition status)
>
The second hand indicates ease of
receiving (= number of GPS satellites
from which GPS signals are received).
 Even when the hand points to 4
units or more, reception may not be
allowed.
 Please note that it may be difficult to receive
GPS signals while you are in motion.
 To cancel the
reception, press
Button B.
It takes a maximum
of 2 minutes to
complete reception.
 It depends on the
receiving conditions.
Second hand
position
25-second
Number of
satellites
5 units
 The larger
the number
of acquired
satellites there
are, the easier
it is to receive
GPS signals.
B
P
C
J
J
Y
May receive
C
a
n
n
o
t
r
e
c
e
i
v
e
3 units
4 units
5 units
6 units
・
・
・
・
・
・
2 units
0 units
E
a
s
y
t
o
r
e
c
e
i
v
e
Press
When the second hand
points to “Y” or “N,”
reception is completed.
4
 During movement of the
date, the buttons cannot be
operated.
 Manually set Daylight Saving
Time (DST).
The reception result is
displayed for 5 seconds.
Then, the hour and minute
hands move, and the time
and date are adjusted. (The
time zone is also adjusted
to the local time zone.)
Reception
result
display
Y: Successful N: Failed
Display
Check that the reception
is successful after the
watch returns to the
time display mode.

Seiko ASTRON Specifications

Frequency

frequency of crystal oscillator	32, 768 Hz
loss/gain (monthly rate)	±15 seconds

Operating Environment

operational temperature range	−10°C to +60°C
normal temperature range	5°C to 35°C

Power

power source	Secondary battery, 1 piece
duration of operation (fully charged)	Approximately 6 months
duration of operation (power save activated)	Approximately 2 years