Seiko Astron 3X22 User manual
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.
Keep this manual handy for easy reference.
* 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.
* 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.
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ASTRON 3X22 GPS SOLAR
Handling cautions
b WARNING
Please note that there is a risk of serious consequences such as severe injury if the following safety
regulations are not strictly observed.
Immediately stop wearing the watch in following cases:
○If the watch body or band becomes edged by corrosion etc.
○If the pins protrude from the band.
* Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE
CENTER.
Keep the watch and accessories out of the reach of babies and
children.
Care should be taken to prevent a baby or a child accidentally swallowing the accessories.
If a baby or child swallows the battery or accessories, immediately consult a doctor, as it will be harmful
to the health of the baby or child.
Do not remove the secondary battery from the watch.
* About the secondary battery → Power Source P. 36
Replacement of the secondary battery requires professional knowledge and skill. Please ask the retailer
from whom the watch was purchased for replacement of the secondary battery.
Installation of an ordinary silver oxide battery can generate heat that can cause bursting and ignition.
b CAUTION
Please note that there is a risk of minor injury or material damage if the following safety regulations
are not strictly observed.
Avoid the following places for wearing or keeping the watch:
○Places where volatile agents (cosmetics such as polish remover, bug repellent, thinners etc.) are
vaporizing
○Places where the temperature drops below
5°C or rises above 35°C for a long time
○Places affected by strong magnetism or static
electricity
○Places affected by strong vibrations
○Places of high humidity
○Dusty places
If you observe any allergic symptoms or skin irritation
Stop wearing the watch immediately and consult a specialist such as a dermatologist or an allergist.
Other cautions
○For adjusting the length of the metallic band, specialized knowledge and expertise are necessary.
Therefore, in such a case, contact the retailer from whom the watch was purchased. If you attempt to
adjust the metallic band, injury may occur to your hand or fingers, or parts of the band may be lost.
○Do not disassemble or tamper with the watch.
○Keep the watch out of the reach of babies and children. Extra care should be taken to avoid risks of
any injury or allergic rash or itching that may be caused when they touch the watch.
○When disposing of used batteries, follow the instructions of your local authorities.
○If your watch is of the fob or pendant type, the strap or chain attached to the watch may damage your
clothes, or injure the hand, neck, or other parts of your body.
○Please keep in mind that if a watch is taken off and placed down as it is, the case back, the band and
the clasp will rub against each other possibly causing scratches on the case back. We recommend
placing a soft cloth between the case back, the band and the clasp after taking off your watch.
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ASTRON 3X22 GPS SOLAR
b WARNING
Do not use the watch for scuba diving or saturation
diving.
The various tightened inspections under simulated harsh environment, which are
usually required for watches designed for scuba diving or saturation diving, have not
been conducted on the water resistant watch with the BAR (barometric pressure)
display. For diving, use watches specifically designed for diving.
b CAUTION
Do not pour running water directly from faucet.
The water pressure of tap water from a faucet is high enough to degrade the water
resistant performance of a water resistant watch for everyday life.
b CAUTION
Do not turn or pull out the crown when the watch is wet.
Water may get inside of the watch.
* If the inner surface of the glass is clouded with condensation or water droplets
appear inside of the watch for a long time, the water resistant performance of the
watch is deteriorated. Immediately consult the retailer from whom the watch was
purchased or SEIKO CUSTOMER SERVICE CENTER.
Do not leave moisture, sweat and dirt on the watch for
a long time.
Be aware of a risk that a water resistant watch may lessen its water resistant
performance because of deterioration of the adhesive on the glass or gasket.
Do not wear the watch while taking a bath or a sauna.
Steam, soap or some components of a hot spring may accelerate the deterioration
of water resistant performance of the watch.
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ASTRON 3X22 GPS SOLAR
This is a GPS solar watch.
This watch has the following features.
GPS signal reception
The time on the watch can be adjusted to the
current time with just one button operation*,
anywhere in the world.
* DST (daylight saving time or “summer time”) is set manually
This watch quickly adjusts the time by receiving GPS signals
from GPS satellites.
→ Place where GPS signals can be easily received/Place
where GPS signals cannot be received P. 16
This watch responds to all the time zones around the world.
→ Time zone P. 6
When the region or time zone where the watch is used is
changed, please carry out operation of “time zone adjustment.”
→ How to adjust the time zone P. 20
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.
→ How to charge the watch P. 14
→ Standard Charging Time P. 14
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.
→ Automatic time adjustment P. 24
* This watch is unable to receive GPS signals when the
energy stored in the watch is low.
→ Check the charging status P. 13
* 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.
Features
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ASTRON 3X22 GPS SOLAR
Mechanism by which the GPS solar watch sets time and date
GPS satellite
This is a satellite operated by the United States Department of
Defense (official name is NAVSTAR), and orbits the earth at an
altitude of 20,000 km.
Initially, this was a military satellite, but at present, information
is partially disclosed to the public and used in various equipment
including car navigation systems and cellular phones.
The GPS satellite is mounted with a high-accuracy atomic clock
with an accuracy deviation of 1 second per 100,000 years.
Mechanism by which this watch sets the time and date
This watch receives GPS signals from GPS satellites to set the
time and date based on the following information.
•Precise time and date based on the atomic clock
•Time zone information for your current location
(The current location is generally measured using 4 or more
GPS satellites, to identify where among the world’s time
zones the watch is located.)
* To receive information about a time zone where you are, it is necessary
to adjust the time zone.
→ How to adjust the time zone P. 20
* 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.
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ASTRON 3X22 GPS SOLAR
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
January 2019).
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.
Daylight saving time has been adopted in about 80 countries, mainly in Europe and North America. The adoption and duration of daylight saving time vary depending on the country.
* 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.
Time zone
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The following functions are included
When the region or time zone where the watch is used is changed
Adjust the time zone.
The correct time for the current region is shown.
→Time zone adjustment P. 19
→ Time zone P. 6
→ List of time differences around the world (for reference) P. 12
Los Angeles
7:00 PM on 6th London
3:00 AM on 7th
To set only the time
The correct time for the set time difference can be displayed by performing “manual time
adjustment”.
→How to manually adjust the time P. 22
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How to check when the time zone information was configured for your watch
3
X
2
2
-
0
A
A
0
The case back shows the caliber-case number of
your watch.
The number to
identify the watch
type
Caliber/case
number
* Display may vary depending on the model.
By referring to caliber-case number shown on the case back, you will be able to determine when
the time zone data was configured.
For more details, refer to the URL below.
https://www.seikowatches.com/global-en/customerservice/knowledge/
gpstimezonedatainfo
In a region where the time zone has changed after time zone information was set on your watch,
the correct time will not be displayed even if time zone adjustment is performed through GPS radio
reception. Please perform the following operations to display the proper time.
<To set the time on the product in a region in which the time zone has
changed>
1. Select the current time in the region, using the manual time difference setting (selection).
If DST (daylight saving time or “summer time”) is in effect, select a time that takes that into
account.
Please see "About manual time difference setting (selection)" P. 23 for details.
2. Next, adjust the time by manual time adjustment.
For details, please refer to "Manual time adjustment" P. 21.
3. When using the watch within the same time zone, the correct time will be displayed after
automatic (GPS) or manual time adjustments.
4. When moving from a region where the official time zone has changed to a different time zone,
then back to the region where the official time zone has changed, carry out the same operations
from 1. - 3. as indicated above to display the correct time in the region where the official time
zone has changed.
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CONTENTS
1. READ FIRST .................................................................................................................. 2
Handling cautions ........................................................................................................... 2
Features ......................................................................................................................... 4
Mechanism by which the GPS solar watch sets time and date ....................................... 5
Time zone ....................................................................................................................... 6
The following functions are included .............................................................................. 7
How to check when the time zone information was configured for your watch ............... 8
2. CONTENTS .................................................................................................................... 9
3. BEFORE USE .............................................................................................................. 10
Names of the parts ....................................................................................................... 10
About display of reception results and in-flight mode ( ) ........................................... 11
List of time differences around the world (for reference) ............................................... 12
Check the charging status ............................................................................................ 13
About charging ............................................................................................................. 14
4. BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS
SIGNALS, ETC.) ................................................................................................................. 15
Basic operation flow ..................................................................................................... 15
GPS signal reception .................................................................................................... 16
To adjust the time zone and time by GPS signal reception (Time Zone Adjustment) .... 19
To adjust only the time by GPS signal reception (manual time adjustment) ................. 21
Setting the destination time zone while in flight, etc. (manual time difference setting),
and setting/resetting DST (daylight saving time or “summer time”) .............................. 23
Automatic time adjustment ........................................................................................... 24
When boarding (in-flight mode ( )) ........................................................................... 25
Leap second (Automatic leap second reception function) ............................................ 26
5. IN CASE OF AN UNUSUAL MOVEMENT OF THE SECONDS HAND .... 28
Seconds hand movement and watch state (energy depletion forewarning function) .... 28
6. TO PRESERVE THE QUALITY OF YOUR WATCH ........................................ 29
Daily care ..................................................................................................................... 29
Performance and caliber / case number ....................................................................... 29
Water resistant performance ........................................................................................ 29
Magnetic resistance ..................................................................................................... 30
Band ............................................................................................................................. 31
How to use an easy adjust type clasp ........................................................................... 32
How to use an adjustable three-fold clasp .................................................................... 33
How to use an adjustable three-fold clasp (Pointed tip diving type) .............................. 34
Lumibrite ...................................................................................................................... 35
Power Source ............................................................................................................... 36
After sales service ........................................................................................................ 37
7. TROUBLESHOOTING .............................................................................................. 38
When the watch is unable to receive GPS signals ........................................................ 38
Adjust the time under a condition in which the watch is unable to receive GPS signals
(Manual time setting) .................................................................................................... 38
When the date or the position of the hour, minute, or seconds hand is incorrect .......... 40
Troubleshooting ........................................................................................................... 43
8. FUNCTION LIST/SPECIFICATIONS ................................................................... 48
Index ............................................................................................................................ 48
SPECIFICATIONS ........................................................................................................ 49
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ASTRON 3X22 GPS SOLAR
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