Seiko Astron 5X53 User Manual

　　BSN5X53 -A1811

5X53

HANDY MANUAL

Printed in Japan

English

Please carefully read the

instructions in this Complete User

Guide before using the watch.

For details, please read t he

“5X53 (GP S Solar) C omplete User Guide”

(https://www.seikowatches.com/global-en/customerservice/instruction/).



Length adjustment service for metallic bands is

available at the retailer from whom the watch was purchased. If you cannot have your watch repaired by the retailer from whom the watch was purchased because you received the watch as a gift, or you moved to a distant place, please contact SEIKO WORLDWIDE SERVICE NETWORK. The service may also be available on a chargeable basis at other retailers, however, some retailers may not perform the service.



If your watch has a protective film for preventing

scratches, make sure to peel it off before using the watch. If the watch is used with the film on it, dirt, sweat, dust, or moisture may be attached under the film and may cause corrosion.

CONTENTS

1. Features �� 3

2. Names of the parts �� 5

3. Check the charging status �� 7

4. Time zone �� 9

5. Time zone display and lis t of time zones around the world �� 11

6. Time zone adjust ment (to adjust the time zone and time by GPS s ignal reception) �� 13

7. Manual time adjustment (to adjus t only the time by GPS signal reception) �� 15

8. Manual time zone se lec tion (to set the watch to the local time of the destinat ion in an airplane, e tc.) �� 17

9. DST setting of the main- dial �� 19

10. Manual time zone selection of t he sub-dial �� 21

11. DST setting of the sub -dial �� 23

12. Switching bet ween the main-d ial and sub-dial �� 25

13. When boarding (in-flight mode (

14. Leap second (Automatic leap second reception function) �� 29

15. Reception res ult display �� 31

16. How to check when the time zone information was configured for your watch �� 33

)) � 27

1 2

　Features

This is a GPS solar watch.

This watch has the following features.

GPS signal reception

This watch can be set to the precise local time by just one button operation anywhere in the world. DST (Daylight Saving Time) is reflected in the time that appears.

This watc h quickly adjus ts the time by recei ving GPS signals from GPS satellites. This watch r esponds to a total of 39 time z ones around the world. When the region or tim e zone where the w atch is used is changed, please carry ou t operation of “time zone adjustment.”



Unlike na vigation equ ipment, this G PS solar watc h is not design ed to consta ntly recei ve GPS signals f rom GPS satel lites witho ut any operati on.

This watch receives GPS signals only in the time zone adjustment mode, automatic or manual time adjustment mode.

Standard Charging Time

GPS signal reception con sumes a lot of en ergy. It i s necessary to charge the watc h by exposing i t to light so that th e indic ator hand poin ts to the “middle” or “full” position. (If the charging st atus is displayed as “low,” the reception will not s tar t even w ith man ual GPS signal r eception.)

Illumination

lx (LUX)

700

3,000

10,000

100,000

The fig ures of “Time r equired for c harging the wa tch to star t moving at one -second in tervals” are e stimation s of time requir ed to charge th e stopped wa tch by expos ing it to light unt il it moves at st eady one-s econd inter vals. Even if t he watch is par tially char ged for a shor ter period, t he watch will re sume one- secondinter val movement . However, it may sh ortly ret urn to two-s econd-in terval move ment. Use the c harging time i n this column as a r ough guide for su fficien t charging time.



The required charging time slightly varies depending on the design and the dial color of the watch.

3 4

Light

source

Fluorescent light

Fluorescent light Sunlight

Sunlight

Solar charging Function

This watch operates by solar charging.

Expose t he dial to light to charge the watch. Once fully ch arged, the watch runs for approximately 6 months .

When the energy stored in the watch runs out comple tely, it takes time to fully charge the wa tch, so please keep in mind to charge the watch regularl y.

From the state where the watch is

Condition

(Example)

General offices

30W 20

Cloudy day 30W 5 cm

Sunny day (Under the direct sunlight on a summer day)

stopped (not charged)

To fully charged

－－

hours

420

hours

11 5

hours

Automatic time adjustment function

This watch automatically adjusts the time in accordance wi th action patterns during use.

When the watch has sensed sufficient brightness under an open sky, it automatically receives GPS signals from GPS sat ellites. T his func tion enables the watch to automatically adjust the time precisely even while you are using the watch.



This wa tch is unable t o receive GPS signals when the energy store d in the watch i s low.

In the state where the hand

To one-second interval

movement is secured

moves (the watch is charged)

To move for one day

3.5

hours

1.5

hours

minutes

hours

　Names of the parts

Hour hand

Minute hand

Button A

Day hand (day of the week)

Indicator hand

Second hand

Sub-dial

(12-hour system)



Display of city name may vary depending on the model.

5 6

Crown

Date

Button B

Sub-dial AM/PM hand

　Check the charging status

The indicator hand position shows whether this watch is able or unable to receive GPS signals. In addition, for the low charging state, the movement of the second hand shows the energy depletion state in further detail.

Reception is

allowed

Indicator

display

Charging

status

full

middle

Solution

Reception is allowed.

Reception is allowed, but keep in mind to charge the watch.

Reception is

not allowed

Indicator

display

Movement of

second hand

1-second interval movement

2-second interval movement

5-second interval movement

Charging status Solution

The watch is unable to

Charge the watch at least until

receive GPS

the indicator hand points to the

signals, but

level position so that the watch is

has energy

able to receive GPS signals.

to operate.

The watch is unable to

low

receive GPS

Continue to charge the watch

signals, and

at least until the indicator hand

does not

points to the level position

have energy to operate.

so that the watch is able to

(The energy

continuously operate and receive

depletion

GPS signals.

forewarning function is activated.

The charging status is not displayed for the in-flight mode ( ).

Reset the in-flight mode ( ) as long as possible. When the indicator hand points to “low,” charge the watch following the above.

7 8

　Time zone

Based on Coordinated Universal Time (UTC), the standard time commonly used is adopted by countries and regions around the world. The standard time is determined by each country or region, and the region where the same standard time is adopted is referred to as the time zone, and presently, the time zone is divided into 39 zones as of March 2018. Further, DST (Daylight Saving Time) is individually adopted in countries and regions.

DST (Daylight Saving Time)

Depending on the area, DST (Daylight Saving Time) is individually set. Daylight Saving Time, or summer time, is a system to lengthen daylight time by advancing 1 hour when daylight time is longer during summer. Daylight saving time has been adopted in about 80 countries, mainly in Europe and North America. The adoption and duration of daylight saving time varies depending on the country. If the time zone adjustment is successful, data regarding the adoption of DST (Daylight Saving Time) for the country in which the GPS signals were received is reﬂected in the time that appears.

 Daylight Saving Time is subject to change owing to circumstances

of the country or region as of March 2018.

Coordinated Universal Time (UTC)

UTC is the universal standard time coordinated through an international agreement. UTC is the primary time standard for recording time around the world. The time obtained by adding a leap second to the “International Atomic Time (TAI)” is determined based on the atomic clock around the world. It is coordinated in order to compensate for deviations from universal time (UT) which is astronomically determined by the UTC.

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