Citizen F910 Instruction Manual
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Citizen F910 Instruction Manual

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English
Please Make Sure to Fully Charge the Watch Before Use
Check to make sure that the second hand of the watch is moving in 1-second
intervals when worn on the wrist.
If it is moving in 2-second intervals, this means that the watch is not suffi-
ciently charged.
7
Charge the watch by wearing the watch so that the back of the watch is in
direct contact with your wrist at all times until the second hand returns to 1-
second interval movement. This watch is provided with an overcharging pre-
vention function that eliminates any worries that the watch may be overcharged
no matter how long it is charged.
When the second hand is moving in 2-second hitch movement, this indicates
that the watch has stopped running as a result of being insufficiently charged.
When this happens, fully charge the watch and reset the time before further
use.
1

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  • Page 1 English Please Make Sure to Fully Charge the Watch Before Use Check to make sure that the second hand of the watch is moving in 1-second intervals when worn on the wrist. If it is moving in 2-second intervals, this means that the watch is not suffi- ciently charged.

  • Page 2: Table Of Contents

    CONTENTS 1. Main Features This watch is an analog quartz watch equipped with a thermoelectric generation Main Features ................. 3 function that drives the watch by converting body heat (heat energy), produced For Proper Power Generation ............4 • Power Generation Mechanism when wearing the watch on the wrist, into electrical energy.

  • Page 3: For Proper Power Generation

    surface temperature of the watch and the temperature of the back cover are 2. For Proper Power Generation equal or when the surface temperature exceeds that of the back cover. The watch [Power Generation Mechanism] is unable to generate sufficient power if the surface of the watch is covered with When this watch is worn on the wrist, body clothing or other objects.

  • Page 4: General Reference For Charging Times

    CAUTION [General Reference for Charging Times] Wear the watch on the wrist for at least 5 hours per day to ensure one day’s [Precautions During Power Generation] worth of charging at the time of 1-second interval movement. If the watch stops Warming the entire watch dissipates the temperature difference between the due to insufficient charge, full charge using the 1-second interval movement will back cover and watch surface, thereby preventing power from being generated.

  • Page 5: Setting The Time And Calendar

    • The date changes at AM 0. Make sure not to mistake AM for PM and vice 3. Setting the Time and Calendar versa when setting the time. If the watch has stopped running due to insufficient charging or the second hand •...

  • Page 6: Setting The Calendar

    Caution <Setting the Calendar> <If the stop position of the second hand shifts, and it does not stop at the 1. Pull the crown once to the calendar correction position. 0 seconds position> 2. While turning the crown to the left, match with the date of the day. If the crown is pulled out to the time correction position when the second hand is •...

  • Page 7: Characteristic Functions

    4. Characteristic Functions The display of this watch changes following the activation of the warning func- tions described below when the watch is insufficiently charged. [Normal Time Display] [Insufficient Recharging [Time Setting Warning Function] 1-second interval movement or Warning Display] If insufficient charging further continues 10-second interval movement When charging becomes...

  • Page 8: Warning Functions

    [Time Setting Warning Function] 5. Warning Functions Although the watch hands begin to move when the watch has been recharged The display of this watch changes when the warning functions described below after it has stopped as a result of being insufficiently charged, since the time is are activated as a result of the watch being insufficiently charged.

  • Page 9: Secondary Battery

    current consumption and extend the duration of watch usage without charging. 6. Secondary Battery When using the watch after storing, make sure to first reset the time after fully WARNING Handling of the Secondary Battery charging and returning to 1-second interval movement. Never attempt to remove the secondary battery from the watch.
  • Page 10 Examples of Use (The unit “bar” is roughly equal to 1 atmosphere.) Minor exposure to water Moderate exposure to Marine sports (skin Scuba diving (with air Operation of the Indication (washing face, rain, etc.) water (washing, kitchen diving) tank) crown with moisture Specification Case (caseback) Dial...
  • Page 11 NOTE: Avoid using solvents (thinner, benzine, etc.), as they may mar the finish. and does not become clear within a day, immediately take the watch to your CAUTION dealer or Citizen Service Center for repair. Leaving the watch in such a state Operating Environment will allow corrosion to form inside.

  • Page 12: Specifications

    Timekeeping will become inaccurate if you place the watch close to magnetic health equipment such as a magnetic necklace or a magnetic latch of a refrig- 1. Caliber No.: F910 erator door or handbag clasp or the earphone of a mobile phone. If this has 2.

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