SEIKO 5X83 Astron GPS Solar Owner’s Manual

5X83 Astron GPS Solar

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Specifications:

• Model Number: 2403 5X83
• Type: GPS Solar Watch
• Features: GPS signal reception, DST adjustment

Product Information:

The SEIKO GPS Solar Watch is a high-tech timepiece that can be
set to the precise local time anywhere in the world with just one
button operation. It features GPS signal reception for accurate
timekeeping and automatically adjusts for Daylight Saving Time
(DST).

Product Usage Instructions:

1. Features:

This watch utilizes GPS signal reception to set the precise
local time and automatically adjusts for DST.

2. Names of the Parts:

Refer to the user manual for a detailed diagram of the watch
parts.

3. Check the Charging Status:

Ensure the watch is adequately charged for proper
functionality.

4. Time Zone:

Understand how to adjust the time zone based on your
location.

5. Time Zone Display and List of Time Zones:

Familiarize yourself with the time zone display and available
options around the world.

Frequently Asked Questions (FAQ):

Q: Can I adjust the time zone manually?

A: Yes, the watch allows for manual time zone adjustments if
needed. Refer to the user manual for detailed instructions.

Q: How do I know if my watch needs a battery replacement?

A: The SEIKO GPS Solar Watch is powered by solar energy and
should not require battery replacements. Ensure the watch is
exposed to light for optimal performance.

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2403
5X83
HANDY MANUAL

CONTENTS

Thank you very much for choosing a SEIKO watch.
For proper and safe use of your SEIKO watch, please read carefully
the instructions in this booklet before using it.
For details, please read the “5X83 (GPS Solar) Complete 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 CUSTOMER SERVICE CENTER. The service may also be available on a chargeable basis at other retailers, however, some retailers may not undertake the service.

1. Features ………………………………………………………………….. 2 2. Names of the parts ………………………………………………….. 3 3. Check the charging status ……………………………………….. 4 4. Time zone ……………………………………………………………….. 6 5. Time zone display and list of time zones around
the world …………………………………………………………………. 7 6. To adjust the time zone and time by GPS signal
reception (time zone adjustment) …………………………….. 8 7. To adjust only the time by GPS signal reception
(manual time adjustment) ………………………………………… 9 8. To set the watch to the local time of the destination
in an airplane, etc. (Manual time zone setting) ………… 10 9. DST setting of the main-dial …………………………………… 11 10.Manual time zone selection of the sub-dial …………….. 12 11.DST setting of the sub-dial …………………………………….. 13 12.Switching between the main-dial and sub-dial ………… 14 13.When boarding (in-flight mode ( )) …………………….. 15
14.Leap second (Automatic leap second reception function) ……………………………………………………………….. 16
15.Reception result display ………………………………………… 17 16.How to check when the time zone information was
configured for your watch ……………………………………… 18 17.How to use the stopwatch ……………………………………… 19

• 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 to the film and may cause rust.
  1

1 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 watch quickly adjusts the time by receiving GPS signals from GPS satellites. This watch responds to all the time zones around the world. When the region or time zone where the watch is used is changed, please carry out operation of “time zone adjustment.”

Solar charging Function
This watch operates by solar charging.
Expose the dial to light to charge the watch. The watch will operate for about 6 months on a full charge.
When the energy stored in the watch runs out completely, it takes time to fully charge the watch, so please keep in mind to charge the watch regularly.

Automatic time adjustment function
This watch automatically adjusts the time in accordance with action patterns during use.
When the watch has sensed sufficient brightness under an open sky, it automatically receives GPS signals from GPS satellites. This function enables the watch to automatically adjust the time precisely even while you are using the watch.

• This watch is unable to receive GPS signals when the energy stored in the watch is low.

• Unlike navigation equipment, this GPS solar watch is not designed to constantly receive GPS signals from GPS satellites without any operation. This watch receives GPS signals only in the time zone adjustment mode, automatic or manual time adjustment mode.

Standard Charging Time

Charge the watch using the times below as a guide. GPS signal reception consumes considerable energy. It is necessary to charge the watch by exposing it to light so that the multi-function indicator hand can continuously display the day of the week (the energy level will be “middle” or “full”). (If the charging status is displayed as “low,” the reception will not start even with manual GPS signal reception.)

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 one-second interval movement is secured

To move for one day

700

Fluorescent light

General offices

–

–

3.5 hours

3,000

Fluorescent light

30 W 20 cm

250 hours

9.5 hours

1 hour

10,000

Sunlight Fluorescent light

Cloudy day 30 W 5 cm

75 hours

3 hours

15 minutes

100,000

Sunlight

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

30 hours

1.5 hours

10 minutes

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 required charging time slightly varies depending on the model.

2

2 Names of the parts

1

5

6

7

2 8
9 3
0 4
a

• The orientation and design of the display may vary depending on the model.

1 Hour hand 2 Multi-function indicator hand
(Usually displays the day of the week) 3 Seconds hand
(Stopwatch seconds hand) 4 Sub-dial (12-hour system)
(Stopwatch hour and minute hands) 5 Stopwatch 1/20-second hand 6 Minute hand 7 Button A 8 Crown 9 Date 0 Button B a Sub-dial AM/PM hand

3

3 Check the charging status The multi-function 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 seconds hand shows the energy depletion state in further detail.

Reception is allowed
When the multi-function indicator hand continues to display the day of the week, the watch can receive signals. The following operation allows you to check the energy level.

1 Press Button B and then release it
The display switches from the day of the week display to the energy level display. (5 seconds)

2 Check the charging status

• The energy level is displayed in four stages.

Multi-function indicator display

Charging status

Solution

Press and then
Multi-function indicator release hand

• When the watch is changed to stopwatch mode, the multi-function indicator hand will display “CHR”. To check the energy level, turn off stopwatch mode. Turning off stopwatch modeP. 19

full

Reception is allowed. Use the watch as it is.

middle

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

• After 5 seconds have elapsed or when Button B is pressed, the watch returns to the time display mode.

4

Reception is not allowed

When the energy level is low, the day of the week is not displayed, and the charging status display continuously recommends charging the watch.

Multi-function indicator display

Movement of seconds hand

1-second interval movement

Charging status

Solution

Charge the watch until the multi-function indicator hand

The watch is unable to receive returns to the day of the week display so that the watch

low

GPS signals, but has energy to is able to receive GPS signals.

operate.

When the hand returns to the day of the week display,

the energy level will be “middle” or “full.”

2-second interval movement
5-second interval movement

–

The watch is unable to receive GPS signals, and does not have energy to operate. (The energy depletion forewarning function is activated.)

Continue to charge the watch until the multi-function indicator hand returns to the day of the week display so that the watch is able to continuously operate and receive GPS signals.

• Press Button B during the charging status display to check the day of the week display. (5 seconds)

If the device is in in-flight mode ( ), reception is not possible regardless of the energy level.

Multi-function indicator display

Movement of seconds hand

Charging status

Solution

–

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

Reset the in-flight mode ( ). When the multi-function indicator hand points to “low,” charge the watch.

5

4 Time zone
Time zone
Based on Coordinated Universal Time (UTC), the standard time commonly used is adopted by countries and regions around the world. Standard time is determined by nations and regions, with “time zone” used to refer to the whole of a region that uses the same standard time. At present, the globe is divided into 38 time zones (as of October, 2023).
DST (Daylight Saving Time)
Depending on the area, DST (Daylight Saving Time) is individually set. Daylight Saving Time means summer time, which is a system to lengthen daylight time by advancing 1 hour when daylight time is long in summer. The adoption and duration of daylight saving time vary 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. * DST (daylight saving time or “summer time”) in each region may be changed
by countries and regions.

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

6

5 Time zone display and list of time zones around the world

The following list shows the relationship between displays of the bezel and dial ring and time difference from the UTC. Please refer to the seconds hand positions below to set the time zone or to check the time zone setting.
DST (Daylight Saving Time) has been adopted in countries marked with a H. In the Lord Howe Island time zone in Australia with a I mark, the time is advanced by 30 minutes while DST (Daylight Saving Time) is in effect. This watch corresponds to DST in the Lord Howe Island time zone.

Display of time zone or time difference Representative city names… 28 cities among the total of 38 time zones around the world Time difference… +14 hours ~ ­12 hours

• The displays of city code and the time difference from UTC are Subject to change depending on model.

• “·” in the display shows that there is a time zone in that place.

• The time zone and adoption of DST (Daylight Saving Time) for each region are current as of October, 2023.

City code
LON PAR CAI JED
· DXB
· KHI DEL
· DAC
· BKK

Display of time
difference UTC 1 2 3 · 4 · 5 · · 6 · 7

City name
HLondon HParis/ HBerlin HCairo Jeddah Tehran Dubai Kabul Karachi Delhi Kathmandu Dhaka Yangon Bangkok

UTC ± hours
0 +1 +2 +3 +3.5 +4 +4.5 +5 +5.5 +5.75 +6 +6.5 +7

City code
BJS ·
TYO ADL SYD
· NOU WLG
· TBU CXI
·

Display of time
difference 8 · 9 · 10
· 11 12
· 13 14 -12

City name
Beijing Eucla Tokyo HAdelaide HSydney ILord Howe Island Nouméa HWellington HChatham Islands Nuku’alofa Kiritimati Baker Island

UTC ± hours
+8 +8.75
+9 +9.5 +10 +10.5 +11 +12 +12.75 +13 +14 -12

City code
MDY HNL
· ANC LAX DEN CHI NYC SDQ
· RIO FEN PDL

Display of time
difference -11 -10 · -9 -8 -7 -6 -5 -4 · -3 -2 -1

City name
Midway islands Honolulu Marquesas Islands HAnchorage HLos Angeles HDenver HChicago HNew York Santo Domingo HSt. John’s Rio de Janeiro Fernando de Noronha HAzores

UTC ± hours
-11 -10 -9.5
-9 -8 -7 -6 -5 -4 -3.5 -3 -2 -1

7

6 To adjust the time zone and time by GPS signal reception (time zone adjustment)

Time zone adjustment
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. This reflects the data regarding the adoption of DST (Daylight Saving Time) in the country that received the GPS signals. The time automatically switches to adjust for the adoption and duration of DST (Daylight Saving Time) for countries that follow DST (Daylight Saving Time). “Normal time” always appears for countries that do not adopt DST (Daylight Saving Time).
How to adjust the time zone

1 Go to a place where GPS signals can be easily received Move to the outdoors under an open sky with good visibility.

2 Continue to press Button B (3 seconds), and then release it when the seconds hand moves to the 30-second position
When the seconds hand has reached the 30-second position, reception is started. The multi-function indicator hand points to “4+”.
Press for 3 seconds While the multi-function indicator hand points to “low,” or “CHR”, reception is not started even with operation for reception. When the hand points to “low,” charge the watch by exposing it to light. When the hand points to , turn off the in-flight mode ( ). When the hand points to “CHR”, turn off stopwatch mode.

3 Direct the watch face upward and wait

• Please note that it may be difficult to receive GPS signals while you are in motion.
  It takes a maximum of 2 minutes to complete reception.
• It depends on the receiving conditions.

< Display during reception (= satellites

acquisition status) >

The seconds hand

0 units

indicates ease of receiving (= number

2 units

of GPS satellites from

3 units

which GPS signals

are received).

4 units

5 units

6 units

• The larger the number of acquired satellites there are, the easier it is to receive GPS signals.

Number of satellites Ease of reception

4 units or more

Easy to receive

3 units

May receive

0-2 units

Cannot receive

• Even when the hand points to 4 units or more, reception may not be allowed.
• To cancel the reception, press Button B.

Press Button B

4 When the seconds hand points to “Y” or “N”, reception is completed

The reception result is displayed

for 5 seconds.

If reception is successful, the time

and date are adjusted.

The settings for the time zone and

DST (Daylight Saving Time) are

reflected in the time that appears.

Reception Y: Successful

N: Failed

result

(8-second

(52-second

display

position)

position)

Display

State

Use the watch as it is.

• The buttons cannot be operated while the hour and minute hands, multi-function indicator hand, or subdial is moving.

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.

8

7 To adjust only the time by GPS signal reception (manual time adjustment)
Manual time adjustment
The watch can be set to the precise current time of the currently set time zone. (The time zone is not changed.)

How to manually adjust the time

1 Go to a place where GPS signals can be easily received
Move to the outdoors under an open sky with good visibility.

2 ContinuetopressButtonA(3seconds), and then release it when the seconds hand moves to the 0-second position
When the seconds hand has reached the 0-second position, reception is started. The multi-function indicator hand points to “1”.

Press for 3 seconds

• While the multi-function indicator hand points to “low,” or “CHR”, reception is not started even with operation for reception.
• When the hand points to “low,” charge the watch by exposing it to light.
• When the hand points to , turn off the in-flight mode ( ).
• When the hand points to “CHR”, turn off stopwatch mode.

3 Direct the watch face upward and wait

It takes up to one minute to complete reception.

• The reception time depends on the reception conditions.

< Display during reception (=

satellites acquisition status) >

The seconds hand indicates

ease of receiving (= number of

GPS satellites from which GPS

signals are received).

• To acquire only time information, the

number of satellites necessary for

reception is one.

Number of

acquired

1

0

satellites

Display

State

Easy to receive

• To cancel the reception, press Button B.

Cannot receive
Press Button B

4 When the seconds hand points to “Y” or “N”, reception is completed

The reception result is displayed

for 5 seconds.

If reception is successful, the

time, date, and day are adjusted.

Reception Y: Successful

result

(8-second

display

position)

N: Failed (52-second position)

Display

State

Use the watch as it is.

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 buttons cannot be operated while the hour and minute hands, multi-function indicator hand, or subdial is moving.

9

8 To set the watch to the local time of the destination in an airplane, etc. (Manual time zone setting)

Manual time zone setting
In places where the time zone cannot be adjusted, the time zone can be set manually.

How to manually set the time zone

1 Pull out the crown to the first click The seconds hand moves to display the currently set time zone.
01 2

2 Turn the crown and set the seconds hand to the time zone of the destination

When the crown is turned, the seconds hand moves to the next zone.
Turn the crown clockwise to advance 1 time zone.