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About energy

■ Energy depletion forewarning function (Two-second

interval movement and Five-second interval movement)

The energy depletion forewarning function is activated when the energy stored in the watch runs low.

In such a case, the seconds hand moves at two-second intervals.

If the watch 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 battery” → P.34

“Guide to charging times” → P.35

 * Neither the button nor the crown can be operated while the seconds hand moves at two-second or five-second

intervals. (This is not a malfunction.)

 * While the seconds hand moves at five-second intervals, the hour and minute hands, as well as the date, stop

operating.

 * While the seconds hand moves at five-second intervals, the automatic reception function and manual reception

function will not work. After the watch is charged sufficiently and the seconds hand returns to normal one-second

interval movement, conduct the manual reception of radio signals to set the watch to the correct time. (“Automatic

reception and manual reception” → P.17)

EN

36

5

SOLAR CHARGING FUNCTION

■ Power save function

This watch is equipped with a power save function which can suppress energy consumption when it is left without receiving

an adequate light source for a certain length of time.

 * There are two types of power save mode.

 

Power Save 1

Power Save 2

Condition The watch is exposed to a state without receiving an

adequate light source for 72 hours or longer.

The watch is in an insufficient charging state for a long

time.

Situation

The seconds hand

stops pointing at the

15-second position,

and the hour and

minute hands, and

date also stop.

The watch conducts

automatic radio signal

receiving.

The seconds hand

stops pointing at the

45-second position,

and the hour and

minute hands, and

date also stop.

The watch does not

conduct automatic

radio signal receiving.

 * The date shows “1”.

How to

handle the

situation

When the watch is exposed to an adequate light source

for 5 seconds or longer, or the button is pressed, it

displays the current time again after the seconds hand

is rapidly advanced.

After sufficiently charging the battery, set the watch for

the current time, if necessary.

Power Save 2

 * While the watch is being charged, the seconds hand moves at “Five-second Intervals.” During the “Five-second Interval Movement,”

neither the button nor the crown can be operated.

 * If the “Power Save 2” mode is prolonged, the stored power amount drops and the internal current time information stored will be lost.

When the watch returns to its normal movement of one-second interval after sufficiently charging the battery, set the current time by

receiving a radio signal. (“Automatic reception and manual reception” 

→ 

P.17)

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5

SOLAR CHARGING FUNCTION

Daily care

The watch requires good daily care

• Do not wash the watch when its crown is in the extended position.

• Wipe away moisture, sweat or dirt with a soft cloth.

• After soaking the watch in seawater, be sure to wash the watch in clean pure water and wipe it dry

carefully.

Do not pour running water directly from a faucet onto the watch. Put some water into a bowl first, and

then soak the watch in the water to wash it.

 * If your watch is rated as “Non-water resistant” or “water resistant for daily use,” please do not wash the watch.

“Performance and type” → P.39

“Water resistant performance” → P.43

Turn the crown from time to time

• In order to prevent corrosion of the crown, turn the crown from time to time.

• The same practice should be applied to a screw down crown.

“Crown” → P.13

Press the button once in a while

• Press the button once in a while to prevent corrosion of the button.

 * If the display is changed by pressing any button, wait and leave it as is.

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6

TO PRESERVE THE QUALITY OF YOUR

WATCH

Performance and type

The case back shows the caliber and performance of your watch

7B72-0AA0

7B

72

-0A

A0

000000

M

AD

IN

 JA

PA

N

WATER

 RES

IST

AN

T

 

10

BA

R

STA

INL

ES

ST

EE

L

Water resistant

performance

Case Number

Magnetic resistant

performance

Water resistant performance

Please refer to P.43.

Case Number

The number to identify the type of your watch.

Magnetic resistant performance

Please refer to P.44 and P.45.

 * The above illustration is provided as an example, therefore it may not be exactly the same as your watch.

EN

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6

TO PRESERVE THE QUALITY OF YOUR

WATCH

Summary of Contents for 7B72

Page 1: ...apan China U S A Germany UK https www seikowatches com 日本語 English 1 JA 1 EN 䬁Ổᶮ㔈 橕ᶮ㔈 そのほかの言語の取扱説明書は パソコンや スマートフォンから当社ホームページ内の カスタマーサービス 取扱説明書ダウンロード にアクセスいただき ご覧ください Please refer to the Instruction Manuals of other languages by accessing Customer Service Instruction on our Website from PC or Smartphone ...

Page 2: ... improve radio signal reception 23 Environments in which it is difficult to receive a radio signal 24 How to check the reception status 26 How to display the reception results 26 4 TIME DIFFERENCE ADJUSTMENT FUNCTION Time difference adjustment function When using overseas 28 Time difference adjustment function characteristics 28 Setting the time difference Setting the radio signal transmitting sta...

Page 3: ...uch 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...

Page 4: ... battery should be charged Power Save Function P 37 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 Automatic Hand Position Alignment Function P 64 When the hand positions display an incorrect time as a result of external influences such as magnetism the watch automatically corrects...

Page 5: ...ows an energy depletion state the battery requires charging Thesecondshandmoves at one second intervals Thesecondshandmoves at two second intervals Thesecondshandmoves at five second intervals The seconds hand is stopped The watch is sufficiently charged The charged energy is depleted P 36 The power save function is activated P 37 Check the movements of the seconds hand after releasing the Power S...

Page 6: ... a region other than radio signal reception range a radio signal cannot be received Check the setting of the time difference Setting the time difference Setting the radio signal transmitting station P 29 When the watch does not display the correct time and date even after successfully receiving a radio signal refer to Troubleshooting Misalignment of the time and hand positions P 72 Misalignment of...

Page 7: ...e are four time zones within the reception range Mainflingen transmitting station 77 5 kHz Anthorn transmitting station 60 0 kHz 1 000 km Approx 500 km DCF77 is operated by PTB Southeastern Frankfurt Mainflingen transmitting station 77 5 kHz PTB Physikalisch Technische Bundesanstalt MSF is operated by NPL Northern England Anthorn transmitting station Frequency 60 0 kHz NPL National Physical Labora...

Page 8: ... within 5 seconds If a reception was successful The seconds hand points to Y Yes the 10 second position If a reception has failed The seconds hand points to N No the 20 second position If the button is pressed after 5 seconds have elapsed or while the seconds hand is moving to display the reception results the reception results display function is cancelled and the watch returns to the TIME displa...

Page 9: ... while the hour and minute hands are moving EN 29 4 TIME DIFFERENCE ADJUSTMENT FUNCTION The radio signal transmitting station can be changed by setting the time difference When setting a time difference for regions other than the radio signal reception ranges the radio signal reception function will not work When setting the Daylight Saving Time DST add one hour to the time difference of the targe...

Page 10: ...minutes or 30 minutes A The time can be adjusted on a 1 hour basis by use of the time difference adjustment function When adjusting to a local time with a time difference of 15 minutes or 30 minutes refer to How to manually set the time P 59 EN 33 4 TIME DIFFERENCE ADJUSTMENT FUNCTION Charging the battery How to charge the battery Expose the dial to light to charge the watch To ensure optimal perf...

Page 11: ...seconds or longer or the button is pressed it displays the current time again after the seconds hand is rapidly advanced After sufficiently charging the battery set the watch for the current time if necessary Power Save 2 While the watch is being charged the seconds hand moves at Five second Intervals During the Five second Interval Movement neither the button nor the crown can be operated If the ...

Page 12: ...erformance lowers b WARNING Notes on replacing the secondary battery Do not remove the secondary battery from the watch 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 ignitio...

Page 13: ...in water and then brush it off with a soft toothbrush Protect the watch body from water splashes by wrapping it up in plastic wrap etc Clean it off with a soft cloth Because some titan bands use pins made of stainless steel which has outstanding strength rust may form in the stainless steel parts If rust advances pins may poke out or drop out and the watch case may fall off the band or the clasp m...

Page 14: ...the movable loop and fixed loop and then securely tighten the clasp EN 49 6 TO PRESERVE THE QUALITY OF YOUR WATCH B B Type 1 While pressing the push buttons on the both sides of the flap lift to open the clasp Push button 2 Remove the pin from the adjustment hole Slide the band left and right and insert the pin into the adjustment hole at an appropriate length Push the buckle and fasten the clasp ...

Page 15: ...l parts Please keep in mind that if original parts are not available they may be replaced with substitutes whose outward appearance may differ from the originals EN 54 6 TO PRESERVE THE QUALITY OF YOUR WATCH Inspection and adjustment by disassembly and cleaning Overhaul Periodic inspection and adjustment by disassembly and cleaning overhaul is recommended approximately once every 3 to 4 years in o...

Page 16: ...ther the button nor the crown can be operated It takes time to receive a radio signal max 12 minutes The required time varies depending on the receiving state of a radio signal EN 57 7 TROUBLESHOOTING When a radio signal cannot be received When a radio signal cannot be received refer to the following pages Not receivable within the radio signal reception range Check that the time difference of the...

Page 17: ...environment in which a radio signal can be received again receive a radio signal to set the time Automatic reception and manual reception P 17 When the watch receives radio signals after the date is manually adjusted it displays the date received from radio signals Ifthedateremainsincorrectevenafterasuccessfulradiosignalreception thepreliminarypositionofthedatemaybemisaligned Set the preliminary p...

Page 18: ... the hour and minute hands The preliminary position of the date is the 1st The preliminary positions of the hour and minute hands are 0 00 AM When the preliminary positions are incorrect the correct time and date cannot be displayed even if the watch receives radio signals In such a case by correcting the preliminary positions the loss or gain of the time or date can be corrected When the numerica...

Page 19: ...has been activated P 37 When the watch is not exposed to adequate light for a certain period of time the power save function to limit energy consumption is automatically activated 1 Fully charge the watch so that the seconds hand may move at one second intervals 2 After that if the watch displays the incorrect time receive a radio wave as needed P 17 P 34 The watch hands advance rapidly unless a b...

Page 20: ...time refer to In case of an abnormal movement to perform procedures 3 If the watch cannot resume normal movement even after conducting the above mentioned procedures consult the retailer from whom the watch was purchased P 64 P 76 Thesecondshandposition is not correctly aligned in the reception results display or the reception level display The seconds hand is out of the preliminary position as a ...

Page 21: ...te hands will start to move and stop pointing to 12 o clock 0 minutes Thebuttoncannotbeoperateduntilallthehandsstop EN 77 7 TROUBLESHOOTING Specifications Cal 7B62 7B72 1 Features Basic watch with three hands Hour minute and seconds hands date display 2 Frequency of crystal oscillator 32 768 Hz Hz Hertz cycles per second 3 Loss gain Monthly rate Loss gain 15 seconds in a monthly rate Except the ca...

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