Seiko 7B24 ANALOG QUARTZ 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.

Keep this manual handy for easy reference.

*Length adjustment service for metallic bands is available at the retailer from whom the watch was purchased or 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.

Contents

1. About This Product

Handing cautions………………………… 84Features… ………………………………… 86Display and button operation… ……… 88How to use Button B… ………………… 90Crown… …………………………………… 91 2. Before Use

Before use………………………………… 92Checking the charging status……… 92Checking the time and date … …… 93 3.How to Set the Time and Date (Radio Signal Reception)

Settingthetimeanddatebyreceivingaradiosignal… … 94Mechanism of radio signal reception… … 94 Automatic reception and manual reception… … 95

About reception conditions ………… 96

Radio signal reception range In Japan (JJY)……		96
Radio signal reception range In China (BPC)… …		97
Radiosignalreceptionrange:IntheUnitedStates(WWVB)…	…	98
Toenablethewatchtoeasilyreceivearadiosignal…	…	99
Environmentsinwhichitisdifficulttoreceivearadiosignal	…100
How to check the reception status	…102
How to display the reception result	…102

4. TimeZoneAdjustmentFunction(Selectingtransmittingstation)

What is the time zone adjustment function? …104

Features of time zone adjustment function	…104
Questionsandanswersregardingtimezoneadjustmentfunction	…105
Howtosetthetimezone(Selectingtransmittingstation)	…106
List of major time zones around the world	…108

		Guarantee ……………………………132
5. Solar Charging Function
					1
About charging ………………………110		After-sales service	………………134
How to charge the watch ………110
		7.Troubleshooting
The indication time for charging the watch …111		Howtoconductmanualreception(Receivingaradiosignalmanually)		…136	2
About energy …………………………112		Conditionsinwhichthewatchmaybeunabletoreceiveradiosignals		…138

Energy depletion forewarning function …112		How to manually set the time		…138	3
Power save function ………………113		How to manually set the date		…140

		Preliminary position	…………………142		4
6. To Preserve the Quality of Your Watch
To preserve the quality of your watch …114		Thingsaroundyouwhichgeneratemagnetism		…143

Daily care ……………………………114		How to set the preliminary position		…144	5
Performance and type	……………115	Setting the preliminary position of the date		…144

Water resistance …………………116		Settingthepreliminarypositionsofthehourandminutehandsmanually		…146	6
Magnetic resistance	……………120	Troubleshooting ………………………148

Band ……………………………………122		In case of an abnormal movement		…156	7
Special clasps ………………………124		How to reset the Built-in IC system		…156

Lumibrite ……………………………129		8. Specifications			8
Power source ………………………130		Specifications …………………………162

About ThisProduct

Handling cautions

WARNING

To indicate the risks of serious consequences such as severe injuries unless the following safety regulations are 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. Ifababyorchildswallowsthebatteryoraccessories,immediatelyconsultadoctor,asitwillbeharmfultothehealthofthebabyorchild.

ImmediatelyconsulttheretailerfromwhomthewatchwaspurchasedorSEIKOCUSTOMERSERVICECENTER.

CAUTIONS

To indicate the risks of light injuries or material damages unless the following safety regulations are 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

○ Placeswherethetemperaturedropsbelow5 orrisesabove35 foralongtime	○Places of high humidity
○ Places affected by strong magnetism or static electricity	○Dusty places
○Places affected by strong vibrations

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

○Do not disassemble or tamper with the watch.

○Keep the watch out of the reach of babies and children.

Extracareshouldbetakentoavoidrisksofanyinjuryorallergicrashoritchingthatmaybecausedwhentheytouchthewatch.

About ThisProduct

Features

This solar-drive and radio-controlled watch is equipped with a radio signal adjustment function.Thewatchisoperatedbyusing“electricenergy”whichisconvertedfromthelightreceivedbythesolarpanel.

This watch displays the precise time by receiving radio signals conveying time information. It can receive official standard frequencies fromJapan(fromeitheroftwotransmittingstations),thePeople'sRepublicofChina,andtheUnitedStatesofAmerica.

■ RadioSignalReceivingFunction This		watch adjusts the time and the date precisely by automatically
→ pages94–101	receivingradiosignalsdaily.
	In addition, radio signals can be forcibly received with manual
	operation.
	This	watch can receive official standard radio signals from Japan
	(from 2 transmitting stations), China, and the United States (the
	transmitting station for receiving radio signals can be selected using
	thetimezoneadjustmentfunction).
■ DisplayFunctionofRadioSignalReceptionLevel The		movement of the second hand indicates the radio signal
→ page137	receptionlevelduringradiosignalreceptionattempts.
■DisplayFunctionofRadioSignalReceptionResults The		movement of the second hand indicates radio signal reception
→ page102	results(Yes/No).

■TimeZoneAdjustmentFunction…(SelectingTransmittingStation)→pages104-109

■SolarChargingFunction…

→pages110-111

■EnergyDepletionForewarningFunction…→page112

■PowerSaveFunction…

→page113

■ AutomaticHandPositionAlignmentFunction…→page142

This watch can display local time around the world by setting the appropriate time zone. In addition, setting the time zone enables the watch to receive official standard radio signals to set the time if the watch is worn in a radio signal reception range.

A solar cell underneath the dial converts any form of light into electrical energy to charge it. Once fully charged, the watch continues to run for approximately six months.

The movement of the second hand indicates that the battery should be charged.

This watch is equipped with a function which can suppress energy consumption when it is left without receiving an adequate light source for a certain length of time.

When the hand positions display an incorrect time as a result of external influences such as magnetism, the watch automatically corrects the hand misalignment.

About ThisProduct

Minutehand

Hourhand

Secondhand

Date

Display and button operation

Button A

Reception result confirmation →page 102Manual reception →page 136

Time zone adjustment →page 106Manual time and date setting →page 138

Crown

Firstclick Manualdatesettingmode →page140

0 1 2 Secondclick Manualtimesettingmode →page138

In case of a screw lock type crown, when

the crown is unlocked, it is at the 0-click

position.

Button B

Time zone adjustment mode (setting

the time to a local time abroad) →page 106


Reception Level Display		Reception Result Display

automatic reception and manual reception

H High reception level50second position

L Low reception level40second position

N Unable to receive radio signals20second position

"About the reception level display" refer to page 137

Confirmation of reception result

Y Reception Successful10second position

N Reception Failed20second position

"Confirm reception result" refer to page 102

Positions of above displays may differ depending on the model.

About ThisProduct

How to use Button B

Button B is recessed in the watchcase to prevent accidental input. Types of buttons differ depending on the design of the watch

Upper half of Button B is covered.

Press the lower half of Button B or press the hollow in the middle of the button using an object with a long tapered tip.

Button B is covered except the hollow in the middle of the button.

Press the hollow using an object with a long tapered tip.

Button B is recessed in the watchcase. ButtonBisrecessedinthewatchcase.

Press the hollow in the middle of the button using an object with a ling tapered tip.

Crown

There are two types of crowns, a normal crown and a screw-lock crown. Check the crown on your watch.

	Turn the	The crown
	crown	turns.
	clockwise.	turns.
	clockwise.
		The
		crown
		does not
		turn.

Normal crown

Pull out the crown and operate it.

Screw-lock type crown

	Unlock the crown before operating it.	After operating
	Unscrew	the crown, lock it.
	Unscrew	While pressing
		While pressing
		the crown
		Screw

If your watch has a screw-lock crown, the crown screws into the watch to prevent malfunction and increase water resistance.

Be careful not to screw the crown in by force as it may damage the slots of the crown.

About ThisProduct

Before Use

Before use

1 Checking the charging status

When the movement of the second hand shows an energy depletion state, the battery requires charging.

Thesecondhandmoves

atone-secondintervals.

Thesecondhandmoves

attwo-secondintervals.

Thesecondhandmoves

atfive-secondintervals.

The second hand

is stopped.

The watch is sufficiently charged.

The energy depletion forewarning function is activated.→page112

Thepowersavefunction

isactivated.→page113

The watch completely

stops operating.

As the charged energy is running out, charge the battery fully.

		How to
Checkthemovementsofthesecondhand		charge the
Checkthemovementsofthesecondhand		battery →
afterreleasingthePowerSavemode		page 110
		page 110
As the charged energy is depleted,
charge the battery fully.

If the second hand does not move at one-second intervals even after fully charging the battery → At Trouble on page 150

2Checking the time and date

The hands of this watch cannot be moved by turning the crown. So when adjusting the time, refer to the following pages regarding the procedures.

Whenthetimeand

datearecorrect

When the time and date are incorrect

Use the watch without adjustment.

Howtosetthetime	When the radio	Setting the time and date
	signal can be	by receiving a radio signal
	signal can be	by receiving a radio signal
zone→page106	received	→ page 94

When setting a time zone for

regions other than Tokyo (Japan), the radio signal reception function will not work.

Radiosignalreceptionrangeindication			→pages96-98
Environmentsinwhichitisdifficulttoreceivearadiosignal →page100
When a radio			Manually set the
signal cannot			time and date

be received			→ pages 138-141

When the watch is not displaying the precise time and date even after successfully receiving a radio signal → In this case, refer to Misalignment of the time and hands on page 152 and Misalignment of the date on page 154.

Before Use

How otSe theTime andDate(Radio SignalReception)

Setting the time and date by receiving a radio signal

■ Mechanism of radio signal reception

The radio-controlled watch displays the precise time and date by automatically receiving and synchronizing itself with the radio signal of an official standard frequency.

Transmitting	Radio-controlled watch
Station	Receive radio signals
	Receive radio signals
	through the antenna
Officialstandard	inside the watch
frequency	↓
Cesium	Analyze time
Cesium	information
Atomic Clock	↓
	Display the current
	time, date and day

Time signal transmitted by a standard frequency is based on a super accurate "Cesium Atomic Clock" that may have a 1 second loss or gain per one hundred thousand years.

■ Automatic reception and manual reception

This watch sets the time and date by automatically receiving a radio signal at a fixed time.

The antenna for receiving radio signals inside the watch is at the 9 o’clock position. Turning the antenna toward the outside of the window enables the watch to receiveradiosignalsmoreeasily.

Automatic reception

This watch automatically receives a radio signal at 2:00 AM.

If the watch fails to receive receives a radio signal at 2:00 AM, it will attempt to receive a radio signalat 3:00 AM. Ifit fails again, itwillattempt to receive a radio signalat 4:00 AM.

When receiving radio signals, place the watch in a place where it can easily receive a radio signal.

How otSe theTime andDate(Radio SignalReception)

Manual reception

When this watch cannot automatically receive a radio signal due to a difficult

receivingenvironment,itispossibletoreceivethemarbitrarilyatanytime.

How to conduct manual reception → pages 136-137

When settinga timezonefor regions otherthanradiosignal receptionrange, the radio signal reception function will notwork.Checkthe settingof the time zone →How to set thetime zone (Selecting transmitting station) on pages 106-107

Radio signal reception results depend on a receivingcondition.→Environments inwhich it is difficult to receive a radio signal on page 100Thiswatch is unable to receiveradio signals outside a reception range → Radio signal receptionrange indicationon pages 96-98

When the watch is not displaying the precise time and date even after successfully receiving a radio signal →At Trouble: Misalignment of the time and hands on page 152, Misalignment of the dateon page154.

How otSe theTime andDate(Radio SignalReception)

About reception conditions

■ Radio signal reception range: In Japan (JJY)

The reception range from each transmitting station is approximately 1,000 km 1,000 km radius of each station .

Hagane-yama transmitting station 60 kHz

Ohtakadoya-yama transmitting station40 kHz

1,000km

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

NICT National Institute of Information and Communications Technology

Whether the watch succeeds in receiving radio signals or not depends on the receiving conditions.

Refer to "Environments in which it is difficult to receive a radio signal" on page 100.

■ Radio signal reception range:In China (BPC)

The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of the transmitting station).

1,500km

Shangqiu National

Time Service Center

Frequency: 68.5kHz

BPC is operated by NTSC. Shangqiu National Time Service Center

Frequency: 68.5kHz

NTSC National Time Service Center

The watch may be able to receive radio signals outside a reception range if the receiving conditions are favorable.

The watch may fail to receive radio signals depending on the reception conditions (weather, geographic locations, radio disturbances such as tall buildings, and orientation of the watch).

Environments in which it is difficult to receive a radio signal on page 100.

How otSe theTime andDate(Radio SignalReception)

SignalReception)

■ Radio signal reception range: In the United States (WWVB)

(RadioThe reception range from the transmitting station is approximately 1,500 km (1,500 km Dateradius of Fort Collins radio station). There are four time zones within the reception range. and

How otSe theTime

1,500km

Fort Collins transmitting station Frequency: 60 KHz

WWVB is operated by NIST.

Fort Collins transmitting station Frequency: 60 KHz

NIST National Institute of Standards and Technology

The watch may be able to receive radio signals outside a reception range if the receiving conditions are favorable.

The watch may fail to receive radio signals depending on the reception conditions (weather, geographic locations, radio disturbances such as tall buildings, and orientation of the watch).

Environments in which it is difficult to receive a radio signal on page 100.

■ To enable the watch to easily receive a radio signal

The antenna for receiving radio signals inside the watch is located atthe9o'clockposition.

Turning the antenna toward the window enables the watch to receiveradiosignalsmoreeasily.

Place the watch where it can receive radio signals more easily, such as by the window.

In order to secure a stable radio signal reception, keep the watch stationary without changing the direction of the watch or tilting it during radio signal reception.

How otSe theTime andDate(Radio SignalReception)

SignalReception)

■ Environments in which it is difficult to receive a radio signal

andDate(Radio

theTime

otSe

How

Close to home electrical appliances such as TV's, refrigerators or air conditionersClose to OA devises such as mobile phones, personal computers or fax machinesClose to steel desks or other furniture made of metal

In places generating radio interference, such as construction sites or places with heavy traffic.

Close to overhead power lines, TV stations, train cables.

Avoid putting the watch in such places when it receives radio signals.

Inside a building, between tall buildings,underground.

Inside a vehicle, train, or airplane

100

NOTICE

The watch may display the wrong time if it fails to receive radio signals properly because of interference. The watch may also fail to receive radio signals properly depending on the location or radio wave receiving conditions. In this case, move the watch to another place where it can receive radio signals.

When the watch is out of reception range, its accurate quartz movement will continue to keep the time.

The time signal transmission may be stopped during maintenance of the facilities of each transmitting station or because of a lightning strike. In such a case, see each station's website for further information or contact SEIKO CUSTOMER SERVICE CENTER.

Websites of transmitting stations as of November, 2007 Japan: NICT Japan Standard Time Group http://www.jjy.nict.go.jp/ China: NTSC http://www.ntsc.ac.cn

The United States of America: NIST http://www.boulder.nist.gov/timefreq/ stations/wwvb.htm

SEIKO CUSTOMER SERVICE CENTER: 0120-612-911 toll free in Japan

How otSe theTime andDate(Radio SignalReception)

101

otSe theTime andDate(Radio SignalReception)

How to check the reception status

■ How to display the reception results

This watch displays the latest reception results (Yes/No) of a radio signal for five seconds.

1 PressButtonAonceandthenreleaseit.

2 Thesecondhandindicatesthereceptionresults.

How

102

	PressButtonA	If a reception was
	PressButtonA	successful: The second
	onceandthen	successful: The second
	onceandthen	hand points to Y
	releaseit.	hand points to Y
	releaseit.	(Yes; the 10 second
		position)
	When Button A is kept
	pressed for three seconds	If a reception has
	or longer, the second hand	If a reception has
	starts to move to the “Zero	failed: The second
	Second Position,” and then	hand points to N
	the watch switches to the	(No; the 20 second
	Manual Reception Mode. In	(No; the 20 second
	this case, press Button A	position)
	again to display the time.

IfButtonAispressedafterfivesecondsorwhilethesecondhandismovingtodisplaythereceptionresults,thereceptionresultsdisplayfunctioniscancelledandthesecondhandresumesitsnormalmovement.

If a reception was successful: The second hand points to Y

A radio signal has been received successfully. Use the watch without any adjustments.

When the watch is not displaying the precise time and date even after successfully receiving a radio signal

→ In this case, refer to Misalignment of the time and hands on page 152 and Misalignment of the date on page 154.

If reception has failed: The second hand points to N.

Place the watch in a place where it can easily receive a radio signal, or change its direction.

Even within the radio signal reception range, this watch may fail to receive a radio signal depending on the condition (due to the influence of weather, geographical features, buildings, or direction). → In this case, refer to Environments in which it is difficult to receive a radio signal on page 100.

Thiswatchisunabletoreceiveradiosignalsoutsideareceptionrange→Radiosignalreceptionrangeindicationonpages96-98

Attempt to receive a Radio Signal in a different time period(In the case of manual reception).

Receiving environmentsdiffer according to timeperiodsevenat thesameplace.

Due toradiosignalcharacteristics, the watchisable toeasily receiveradiosignalsduring nighttimehours.

Whenmanuallyadjustingthetimeevenaftersuccessfullyreceivingaradiosignal,receptionresultsareresetto“N.”

Whenpullingthecrowntothesecondclick,thewatchentersthemanualtimesettingmode,andresetsthereceptionresultswithoutadjustingthetime.

When the watch is unable to receive radio signals, it may move depending on the quartz movement.

Accuracy of loss / gain: ±15 seconds per month

How otSe theTime andDate(Radio SignalReception)

103

TimeAdjustmentZone Function

What is the time zone adjustment function?

■ Features of time zone adjustment function

Thiswatchisabletobeset toanoverseaslocaltimeinone-hourunits.

Mostoftheregionsaroundtheworldadopttimedifferencesbasedonone-hourunits. ThewatchsettimedifferencebasedonUTC(CoordinatedUniversalTime).

The range of time differences around the world centered from UTC is “from – 11 hours to +13hours.”

This watch can automatically display the local time of a desired area by selectingitstimezone.

When the watch is set in the time zone adjustment mode, the second hand indicates the time zone.

Press the button to set the time zone referring to the position of the second hand.

0 second position: UTC

			ho
		1	u
	1
	‒
m
o
r
F	5
	5

10 11

to
+
1
3	h
	o
	u
	r
5	s
5
	10
	13

Thiswatchselectsaradiosignaltransmittingstationbysetting thetimezone.

When the watch is used in Tokyo, set the second hand to “Tokyo (Japan): 9 second position” to receive the official standard frequency of Japan.

When the watch is used in China, set the second hand to “Hong Kong (China): 8 second position” to receive the official standard frequency of Japan.

If a time zone other than a radio signal reception range is selected, the radio signal reception function will not work.

→ How to set the time zone pages 106-107

104 → List of major time zones around the world page 108

■ Questions and answers regarding time zone adjustment function

When returning to Japan from overseas, is the time automatically set to Japan time?Just moving cannot adjust the time to Japan time. After setting the time difference, radio

signal reception is not performed. When wearing a watch in Japan, set to Japan time by use of the time zone adjustment function.

The hands stop during operation of time zone setting, therefore, does time lag occur?The internal circuit stores the time, therefore, no time lag occurs.

How accurate is the watch while the time difference is being set.

While the time zone is being set, the watch has an accuracy of a normal quartz watch. (Monthly rate: ±15 seconds)

How is adjustment made to a local time with a time difference of 15 minutes or 30 minutes?

The time can be adjusted on a 1 hour basis by use of the time zone adjustment function.

When adjusting to a local time with a time zone difference of 15 minutes or 30 minutes, please refer to the " How to manually set the time " on pages 138-139.

TimeAdjustmentZone Function

105

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