Seiko 7B26 User Manual
You are now the proud owner of a SEIKO Radio Wave Controlled
Worldtimer Cal. 7B26. For best results, please read the instructions
in this booklet carefully before using your SEIKO Analogue Quartz
Watch. Please keep this manual handy for ready reference.
Sie sind jetzt stolzer Besitzer einer SEIKO Funk-Weltzeituhr Kal. 7B26.
Bitte lesen Sie diese Bedienungsanleitung vor der Verwendung der Uhr
sorgfältig durch und heben Sie sie gut auf.
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CONTENTS
FEATURES ....................................................................................................................... 4
DISPLAY AND BUTTON OPERATION ............................................................................. 6
HOW TO USE BUTTON B ............................................................................................... 8
THE SCREW LOCK TYPE CROWN ................................................................................. 9
CHARGING THE SOLAR BATTERY ................................................................................. 10
CHECKING THE CHARGING STATUS BY THE MOVEMENT OF THE SECOND HAND.. 12
SETTING THE TIME BY RECEIIVIG RADIO SIGNAL ....................................................... 18
RADIO SIGNAL RECEPTION RANGE .............................................................................. 22
MANUAL RECEPTION .................................................................................................... 26
HOW TO CHECK THE RECEPTION RESULT .................................................................. 28
APPROPRIATE PLACE TO KEEP A RADIO-CONTROLLED WATCH .............................. 30
TIME ZONE ADJUSTMENT ............................................................................................ 33
WHAT IS A TIME ZONE? ................................................................................................ 34
HOW TO SET THE TIME ZONE ...................................................................................... 40
EXAMPLES OF TIME ZONE ADJUSTMENT .................................................................. 46
HOW TO MANUALLY SET THE TIME AND DATE .......................................................... 52
ABNORMAL DISPLAY OR IMPROPER FUNCTION (HOW TO RESET THE BUILT-IN IC)
SPECIFICATIONS ............................................................................................................ 60
TROUBLESHOOTING ..................................................................................................... 62
For the care of your watch, see “TO PRESERVE THE QUALITY OF YOUR
WATCH” in the attached Limited Warranty and Instruction Booklet.
...... 56
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FEATURES
This solar radio-controlled watch is equipped with a time zone adjustment function.
The watch can automatically display local time in a different time zone by selecting the time zone.
It can receive official standard frequencies of Germany, the United States and Japan to adjust the
time.
AUTOMATIC TIME SETTING
■
The watch m aintains the precis e time by automatically r eceivin g radio signals on an offic ial
standard frequency. The watch can receive official standard frequencies of Germany, the United
States, and Japan (from either of two transmitting stations) by selecting the time zone.
Manual reception is also possible (the watch is unable to receive radio signals outside of the
reception range of each standard frequency).
DISPLAY OF RADIO SIGNAL RECEPTION LEVEL
■
During reception attempts, the watch displays the reception level of radio signals.
DISPLAY OF RADIO SIGNAL RECEPTION RESULT
■
Reception result (succeeded or failed) can be confirmed following reception of radio signals.
AUTOMATIC CALENDAR
■
The calendar adjusts odd and even months including February in leap years.
TIME ZONE ADJUSTMENT
■
The watch can be set to local time in a different time zone by selecting a time zone.
AUTOMATIC HAND ALIGNMENT
■
When the hand positions display incorrect time as a result of the influence of various external
sources, the watch automatically corrects the hand alignment itself.
SOLAR RECHARGEABLE BATTERY
■
A solar cell underneath the dial converts any form of light into "electrical energy” to power the
watch and the power is stored in a secondary battery. Once fully charged, the watch continues
to run for approximately six months.
ENERGY DEPLETION FOREWARNING FUNCTION
■
The movement of the second hand indicates that the battery should be charged.
POWER SAVE
■
The Power Save mode can be activated when the watch is left without an adequate light source.
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Time Zone Display
[Time zone selection]
City names: 24 cities
around the world
UTC: Universal
Coordinated Time
DST, arrow mark:
Daylight Saving Time
* Refer to “24 TIME
ZONES AND TIME
DIFFERENCES FROM
UTC” on page 35.
Reception Level Display
[Automatic Reception
and Manual Reception]
H: High reception level
L: Low reception level
N: Unable to receive
radio signals
* Refer to “MANUAL
RECEPTION” on pages
26-27.
Transmitting Stations
of Standard Frequencies
[Reception Result
Confirmation]
DCF77 (Germany)
WWVB
(The United States)
JJY (Japan)
* Refer to “HOW TO
CHECK THE RECEPTION
RESULT” on pages 28-29.
Reception Result
Display
[Confirmation of
reception result]
Y: Reception Successful
N: Reception Failed
* Refer to “HOW TO
CHECK THE RECEPTION
RESULT” on pages 28-29.
* Positions of above displays may
dier depending on the model.
DISPLAY AND BUTTON OPERATION
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Minute hand
Button A
(manual reception
and reception
result confirmation)
Button B
(Time zone adjustment)
*Button B is recessed
in the watch case to
prevent accidental
input. Refer to
“HOW TO USE BUTTON
B” on page 8.
CROWN
(Refer to “THE SCREW
LOCK TYPE CROWN”
on page 9.)
a:Normal Positiion
b:First click
c:Second click
Hour hand
Second hand
Date
a b c
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Turn counterclockwise Locked Unlocked Turn clockwise while
pressing it.
HOW TO USE BUTTON B
Butt on B is recesse d in the wat ch case to preve nt acciden tal input. Types of buttons diff er
depending on the design of the watch.
HOW TO PRESS BUTTON B
THE SCREW LOCK TYPE CROWN
The crown can be locked to prevent operating errors.
HOW TO OPERATE SCREW LOCK TYPE CROWN
- Unscrew the crown before the crown operation.
- Screw in the crown when the operation is over.
[To unscrew the crown]
Turn the crown counterclockwise. The crown can be pulled out.
[To screw in the crown]
Turn the crown clockwise until it stops while pressing it.
Button B is covered except for the
hollow in the mid dle of the button.
Pre ss t he hollow us ing an o bject
with a long tapered tip.
Th e u pp er h al f of But to n B i s
cov ered. P ress the lowe r ha lf o f
Button B or p ress the hollow in the
middle of the button using an object
with a long tapered tip.
Button B is rece ssed in the watch
case. Press the hollow in the middle
of the button using a n object with a
long tapered tip.
*The crown can be pulled out after it is unscrewed.
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Illumination Light source Condition (Example) Time required for Time required for Time required for
1 x (LUX) fully charging the charging the charging the
watch watch to start watch to run for
moving at one- one day
second intervals
★
500
Incandescencent light
60W 60cm — — 5 hours
700 Fluorescent light General offices — — 3 hours
1000 Fluorescent light 30W 70cm — 120 hours 2 hours
3000 Fluorescent light 30W 20cm 90 hours 30 hours 30 minutes
5000 Fluorescent light 30W 12cm 70 hours 24 hours 24 minutes
10000 Fluorescent light 30W5cm 25 hours 8 hours 9 minutes
10000 Sunlight Cloudy day 25 hours 8 hours 9 minutes
100000 Sunlight Sunny day 8 hours 2 hours 3 minutes
(Under direct
sunlight on a
summer day)
CHARGING THE SOLAR BATTERY
HOW TO CHARGE THE WATCH
This watch is a solar-powere d watch containi ng a solar cell underneath the dial to convert any
form of light into "electrical energy” and store the power in a secondary battery.
To enj oy opti mal per fo rma nce
of this watch, it is recommended
that the watch be kept sufficiently
charged at all times.
*Be fore init ia lly using the watch
or wh en the wa tc h has stop ped
as a r esult of com plete depletion
of stored power, charge the watch
sufficiently.
STANDARD CHARGING TIME
*The table above is only provided as an approximation.
The figures in the table above refer to the time required to charge the stopped watch by exposure to light until the
★
watch moves at steady one-second intervals, through two-second intervals and five-second intervals.
Even if the watch is partially charged for a period shorter than the time provided in the above table, it will resume
one-second interval movement; however the one-second interv al movement will change to two-second interval
movement shortly. To avoid this and charge the watch to a sufficient level, use the charging time mentioned above
as a measure.
*The required charging time slightly varies depending on the model of the watch.
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The second hand moves
at one-second intervals.
The second hand moves
at two-second intervals
The second hand moves
at five-second intervals.
The second hand
is stopped.
The watch is
sufficiently charged.
The power save
function is activated.
The watch completely
stops operating.
The energy depletion
forewarning function
is activated.
No need to charge
the watch yet.
Refer to “POWER SAVE
FUNCTION” on pages 14-15.
Refer to “ENERGY
DEPLETION FOREWARNING
FUNCTION” on page 13
to charge the watch sufficiently.
*1
*2
Energy having been stored in the watch
ha s be en co ns um ed d ue t o reas on s
su ch as l ea ving th e watch i n a d ar k
place for a long time. After charging the
wa tc h s uf fi cie nt l y, c ond uc t man ua l
reception to set the time.
CHECKING THE CHARGING STATUS BY THE MOVEMENT OF
THE SECOND HAND
*1. If the second hand is stopped even after the watch is sufficiently charged, refer to "TROUBLESHOOTING" on pages 64-65.
*2. After the watch receives a radio signal, when the date is incorrect even if the correct time is displayed,
check that the calendar is set to the preliminary position (refer to “PRELIMINARY POSITION CHECKING
AND SETTING FOR THE CALENDAR” on pages 58-59).
ENERGY DEPLETION FOREWARNING FUNCTION
The energy depletion forewarning function is activated when the energy stored in the watch runs
low. In such a cas e, the second hand moves at two-second intervals. If the wa tch continues
to be in the state of two-second interval movement, the watch switches to five-second interval
movement, followed by a completely stopped state.
If the energy depletion forewarning function is activated, charge the watch sufficiently.
HOW TO CHARGE THE WATCH…page 10
STANDARD CHARGING TIME…page 11
* Neither the buttons nor the crown can be operated while the second hand moves at two-second or five-
second intervals (this is not a malfunction).
* While the second hand moves at five-second intervals, the hour and minute hands and calendar stop
operating.
* While the second hand moves at five-second intervals, the watch is u nabl e to receive radio signals
automatically. After the watch is charged sufficiently and the second hand returns to normal one-second
interval movement, conduct the manual reception of radio signals to set the watch to the correct time. After
completing the radio signal reception, when the date is incorrect even if the correct time is displayed, check
that the calendar is set to the preliminary position (refer to “RADIO SIGNAL RECEPTION” on page 20 and
“PRELIMINARY POSITION CHECKING AND SETTING FOR THE CALENDAR” on pages 58-59).
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POWER SAVE FUNCTION
Whe n the wat ch is no t expo se d to an adequ at e ligh t sour ce , the powe r save func tio n is
automatically activated in order to reduce unnecessary energy consumption.
When this state continues for 72 hours or longer, the watch enters "the Power Save One” mode.
If the watch continues to be insufficiently charged, and the stored power falls below a certain level,
the watch automatically switches to "the Power Save Two” mode.
[POWER SAVE 1]
•When this state continues for 72 hours or longer, the watch enters
"the Power Save One” mode.
•When the w atch is in "the Power S ave One” mode, the second
hand rotates to point to the 15-second position and stops.
•In this state, mov em en t of the hou r and min ut e hand s and
cal end ar opera tio n will cea se , but the watch wi ll cont inu e to
conduct automatic reception.
•To rese t the watc h to disp la y the curr en t time , expo se it to
adequate light for five seconds or longer.
* When the watch returns to its normal movement, the watch hands rotate rapidly to display the current time. After
the watch hands are set to the current time, the correct date is displayed.
[POWER SAVE 2]
•If the watch continues to be insufficiently charged, an d the stored power fall s below a certain
level, the watch automatically switches to "the Pow er Save Two” mode, to limit further e nergy
consumption. When the watch is in "the Power Save Two” mode, the second hand rotates to point
to the 45-second position and stops.
•In this state, movement of the hour and minute hands and calendar operation will cease and the
watch will also stop conducting automatic reception.
•When the watch enters "the Power Save Two” mode, immediately
charge the watch.
* While the watch is b eing charged, the second hand moves at five-s econd
intervals. During the five-second interval movement, neither the buttons nor the
crown can be operated (this is not a malfunction).
* If “the Power Save Two” mode is prolonged, the amount of stored power drops
and the in ternal t ime sett ings wil l be lost. In s uch a case, after c ompleting
battery charging, conduct the manual reception to set the watch to the correct
time. After co mpleting th e radio signal r eception, when the date is incorrect
even if the c orrect time is d isplayed, chec k tha t the calen dar is set to the
preliminary position (refer to “RADIO SIGNAL RECEPTION” on page 20 and “ PRELIMINARY POSITION CHECKING
AND SETTING FOR THE CALENDAR” on pages 58-59).
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WARNING
WARNING
The solar cell underneath the dial c onverts light into "e lectric al energy ” and stores the po wer
in a secondary battery. When the secondary battery is fully charged, the overcharge prevention
function is automa tically activated to avoid further charging. There is no need to wor ry about
damage caused by overcharging no matter how much the secondary battery is charged in excess
of the "time required for fully charging the watch.”
*Refer to “
STANDARD CHARGING TIME
(Notes on charging the watch)
When charging the watch, do not place t he watch in close proximity to an intense light
source such as lighting equipment for photography, spotlights or incandescent lights, as
the watch may be excessively heated resulting in damage to its internal parts.
When charging the watch by exposure to direct sunlight, avoid places that easily reach
high temperatures, such as a car dashboard.
Always keep the watch temperature under 60ºC.
” on page 11 to check the time required for fully charging the watch.
POWER SOURCEOVERCHARGE PREVENTION FUNCTION
•The battery used in this watc h is a special secondary battery, which is different from ordinary
batteries. Unlike an ordinary silver oxide battery, the secondary battery does not require periodic
replacement.
•The secondary battery is an environmentally friendly, clean energy storage device.
When replacing the secondary battery, make sure that the exclusive secondary battery for
this watch is used. Installation of an ordinary silver oxide battery can generate heat that
can cause bursting or ignition.
Even when a silver oxide battery is substituted, electrical continuity cannot be obtained.
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SETTING THE TIME BY RECEIIVING RADIO SIGNAL
Transmitting
Station
Cesium
Atomic
Clock
Official
standard
frequency
Radio-controlled
watch
Receives radio signals through
the antenna inside the watch
Analyzes time information
Displays the current time
and date
WHAT IS A RADIO-CONTROLLED WATCH?
The radio-contro lled watch display s the precise time and d ate by auto matically rece iving and
synchronizing itself with the radio signal of an official standard frequency.
Time signal transmitted by a standard frequency is based on a super accurate "Ce sium Atomic
Clock” that may have a 1 second loss or gain per one hundred thousand years
AUTOMATIC HAND ALIGNMENT
Under normal operation, periodic checks of each hand position are performed once every one-
minute for the second hand position, and once every twelve hours for the hour and minute hand
positions.
<When the hand positions move out of alignment >
Strong shocks can cause misalignment of the hand positions
・
The hand positions may move out of alignment due to strong shocks to the watch when the watch is dropped or
hits against a hard surface.
Strong magnetism can cause misalignment of the hand positions.
・
The hand positions may move out of alignment due to strong magnetism generated by mobile phones, speakers,
magnetic therapy devices, or other magnetized objects.
When the watch is stopped due to complete depletion of stored power
・
The radio-controlled watch automatically sets itself to the precise time. However, if the preliminary
hand positions are misaligned when the time is set, the watch will be unable to display the precise
time even after it receives a radio signal properly. It is like a scale which cannot display the correct
weight because its hand is not set to the 0 position before weighing.
Be assured that all hand positions of this watch are automatically corrected as long as the watch
receives radio signals properly, omitting complicated procedures.
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RADIO SIGNAL RECEPTION
The watch can receive a radio signal either automatically or manually.
- Automatic reception: The watch receives radio signals automatically at least once a day.
It automatically receives radio signals at 2:00 AM, 3:00 AM, and 4:00 AM.
When the watch receives a proper radio signal, the reception is completed.
The watch can continue to display the precise time as long as the automatic reception is successful.
- Manual reception: The manual reception of radio signals can be conducted.
MANUAL RECEPTION …pages 26-27
This radio-controlled watch enables the wearer to check the reception result of radio signals.
- HOW TO CHECK THE RECEPTION RESULT…pages 28-29
* If the watch is set to a time zone outside radio signal receptio n range, manual reception canno t be
conducted (refer to“TIME ZONE DISPLAY” on pages 36-39).
* Whether the watch succeeds in receiving radio signals or not depends on the receiving conditions (refer to
“APPROPRIATE PLACE TO KEEP A RADIO-CONTROLLED WATCH” on page 30).
* The watch cannot receive radio signals outside a reception range (refer to“RADIO SIGNAL RECEPTION
RANGE” on pages 22-25).
This watch can receive official st andard frequencies from transmitting stations in Germany, the
United States, and Japan (2 stations). The standard frequency to be received can be changed by
selecting the time zone.
- TIME ZONE ADJUSTMENT...page 33.
[Official standard frequency in Germany: DCF77]
DCF77 is operated by Physikalisch-Technisch Bundesanstalt(PTB).
Mainflingen transmitting station (77.5 KHz) in southeastern Frankfurt
[Official standard frequency in the United States: WWVB]
WWVB is operated by National Institute of Standards and Technology (NIST).
Fort Collins radio station (60KHz), Denver, Colorado
[Official standard frequency in Japan: JJY]
JJY is operated by the National Institute of Information and Communications Technology (NICT).
JJY is transmitted from two stations in Japan. Each station transmits JJY in a different frequency.
Fukushima (Ohtakadoya-yama transmitting station: 40 KHz)
Kyushu (Hagane-yama transmitting station: 60 KHz)
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