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Citizen BTO Series Instruction Manual

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  • Page 2 Features Solar-powered and no battery replacement (→ page 9) The date window— The calendar—no date correction large and highly visible at the end of months (→ page 13)

  • Page 3: Table Of Contents

    Table of contents Part names and their main functions .............. 4 How to use the screw down crown ..............5 When leaving the watch unused for an extended period of time ....5 Charging the battery ..................6 Charging the battery ....................6 When the battery becomes short of power —Insufficient charge warning function ............
  • Page 4 Troubleshooting ....................30 • The second hand moves only once every two seconds. • All hands stop moving. • The figures are not displayed upright. • The date is wrong. • The date changes to the following day at around noon. •...

  • Page 5: Part Names And Their Main Functions

    Part names and their main functions Minute hand Date Button B : For setting the calendar-related functions Hour hand Crown: For setting the time, checking the date, etc. 24-hour hand: Goes around once Button A : a day For setting the date etc. Example of a button Second hand Press HERE.

  • Page 6: How To Use The Screw Down Crown

    7 How to use the screw down crown To release the crown Turn the crown to the left until it pops out slightly. To lock again Tighten the crown completely by pressing and turning it to right. 7 When leaving the watch unused for an extended period of time Pull out the crown to position All hands stop moving and the battery power is saved.

  • Page 7: Charging The Battery

    Charging the battery 7 Charging the battery This watch has a battery which is charged by exposing the dial to light such as direct sunlight or fluorescent lamps. To obtain the best performance: • Expose the dial to direct sunlight at least once a month. •...

  • Page 8: When The Battery Becomes Short Of Power-Insufficient Charge Warning Function

    7 When the battery becomes short of power—Insufficient charge warning function When the battery becomes short of power, the second hand moves once every two seconds—insufficient charge warning function. Charge the battery by exposing the dial to light. • After the battery is charged for a while, the The two-second second hand will move normally.

  • Page 9: Charging Time

    Charging the battery 7 Charging time Below are the approximate values when exposing to the light continuously. The charging time differs depending on the color of dial or other conditions. Use the table below only for your reference. Charging time to Charging time to start Illuminance Environment...

  • Page 10: After The Battery Is Fully Charged-Overcharge Prevention Function

    7 After the battery is fully charged— Overcharge prevention function After the battery is fully charged, charging automatically stops to prevent overcharging, which may damage to the battery, or affect the accuracy, Time for charging fully functions, and performance of the watch. when the battery is empty (approx.) —...

  • Page 11: Setting The Time

    Setting the time Pull out the crown to position Date window All hands stop moving. • To set the time accurately, pull out the crown when the second hand is at the 0-second position. Second hand 24-hour hand...
  • Page 12 Turn the crown to set the time. All hands other than the second hand will move. • Take care of the position of the 24-hour hand to set A.M. or P.M. correctly. • When you set the hands to around midnight, the date will change to the following day.

  • Page 13: Checking The Date, Month, And Year

    Checking the date, month, and year You can check the date, month, and year* Date window The crown The button position operation To check a — date To check a — month To check an Pressing button A * year Button A This watch shows the number of years passed since the last leap year.

  • Page 14: Perpetual Calendar

    Display examples of the date window Ex. 5th day When checking a date Ex. February When checking a month • “M” stands for Month. Ex. Next year of a leap year When checking an year • “L.Y. ” stands for Leap Year. The figures in the date window change slowly.

  • Page 15: Setting The Year, Month, And Date

    Setting the year, month, and date NOTICE: Do not operate between 23:00 and 0:30; otherwise, the date may not change even if the 24-hour hand moves past midnight. The calendar setting has the following stages: Enter the setting mode Set the year Set the month Set the date (→...
  • Page 16 Enter the setting mode Date window Button B The figures in the date window move slightly up and down or right and left, or change to tell you that you can do the next operation. 1-1. Pull out the crown to position The month appears in the date window.
  • Page 17 Setting the year, month, and date Set the year Set the number of years passed since the last leap year. Date window Quick reference chart for number of years Button B passed since leap year Year Passed year Year Passed year 2004 Leap year 2008...
  • Page 18 2-1. Press button A repeatedly to set Setting value Window the year. When the current year is a leap year When two years have passed . Press button B . Now you can set the month. Go to the next page...
  • Page 19 Setting the year, month, and date Set the month Set the month—tens digit, then ones digit. Date window Button B Button A...
  • Page 20 3-1. Press button A to set the tens digit Month Setting value Window of the month. From January to September From October to December 3-2. Press button B . Now you can set the ones digit. 3-3. Press button A repeatedly to set Setting value Window the ones digit of the month.
  • Page 21 Setting the year, month, and date Set the date Set the date—tens digit, then ones digit. The selectable date differs Date window depending on the year and month you have set. Button B Button A...
  • Page 22 4-1. Press button A repeatedly to set the Setting value Window tens digit of the date. 5th day 30th day 4-2. Press button B . Now you can set the ones digit. Press button A repeatedly to set the 4-3. Setting value Window ones digit of the date.

  • Page 23: Precautions

    Precautions WARNINGS Handling the secondary battery • Do not remove the battery. When it is required, keep the battery out of the reach of children to prevent them from swallowing it. • If the battery is swallowed, consult a doctor and seek medical treatment.
  • Page 24 CAUTIONS Cautions about charging • Excessively high temperature at charging battery may cause discoloration and deformation of the exterior, and malfunction of the movement. • Do not charge the battery at a high temperature (about 60˚C/140˚F or higher). Examples: – charging the battery by light such as an incandescent lamp or halogen lamp –...
  • Page 25 Precautions To avoid injury • DO NOT wear the watch where the temperature becomes extremely high—such as in a sauna. Otherwise the watch may become hot and cause skin burn. To avoid malfunction • DO NOT use the watch where the temperature is lower or higher than the operation temperature specified in the instruction manual.
  • Page 26 • DO NOT place the watch nearby the household appliances generating static electricity. Timekeeping may become inaccurate if the watch is exposed to such strong static electricity that which is emitted from a TV screen. • DO NOT apply any strong shock, for example, by dropping it onto a hard floor. •...
  • Page 27 Precautions WARNINGS Water-resistance performance Before use, confirm the water-resistance level of your watch indicated on the dial and case. Indication Specifications Dial Case (case back) WATER RESIST(ANT) or WATER RESIST(ANT) Water-resistant to 3 atmospheres no indication WR 50 or WATER WATER RESIST(ANT) 5bar or WATER Water-resistant to 5 atmospheres RESIST 50...
  • Page 28 The unit “bar” is roughly equal to 1 atmosphere. “WATER RESIST(ANT) xx bar” may also be indicated as “W.R. xx bar. ” Examples of use Minor exposure Moderate exposure to Scuba diving Operation of the Marine sports to water (washing water (washing, kitchen (with an air crown when the...
  • Page 29 Precautions • Water-resistance for daily use (up to 3 atmospheres): This type of watch is resistant to minor exposure to water. For example, you may wear the watch while washing your face; however, it is not designed to be used underwater. •...
  • Page 30 • If water has penetrated the watch, or if the inside of the glass is fogged up and does not become clear in a day, take the watch to your dealer or Citizen Service Center for repair. Leaving the watch in such a state will rust the internal parts and cause malfunction.

  • Page 31: Troubleshooting

    Troubleshooting If you have a problem with your watch, check the table below for a possible solution before calling for service. Reference Symptoms Remedies page The hands do not work properly The second hand moves only Charge the battery. once every two seconds. All hands stop moving.

  • Page 32: The Watch Does Not Work Properly

    Reset the watch, then adjust the properly even if you have tried reference position. the remedies on page 30. The watch does not move even Contact the Citizen Service Center or the – if the battery is fully charged. store where you purchased your watch.

  • Page 33: Checking And Correcting The Reference Position

    Checking and correcting the reference position The figures of the date window rotate referring to the “0” position as the initial position. If the “0” position, the reference position, has moved off because of shock or other reasons, the figures are not displayed upright. Correct the reference position following the procedure below when the figures are not displayed upright.
  • Page 34 1-2. Press and hold button B until the figures start moving to show the current reference position. Check the current reference position after the figures have stopped moving. Position of figures The status of the reference position “0”s of both digits are The reference position is correct.
  • Page 35 Checking and correcting the reference position Correct the reference position Date window Button B The figures in the date window move slightly up and down or right and left, or change to tell you that you can do the next operation. 2-1.
  • Page 36 2-2. Press button A repeatedly to display the “0” upright. Each time you press the button, the “0” moves step by step. • When you press and hold button A , the “0” moves seamlessly. Press button B to advance to the ones digit setting. 2-3.

  • Page 37: Resetting The Watch

    Resetting the watch The watch may not work properly if it is affected by static electricity or shock. In this case, reset the watch, then adjust the reference position and set the time, year, month, and date again. Date window Pull out the crown to position All hands stop moving.
  • Page 38 Press buttons A and B at the same time. The reference position and the calendar are reset. • When the reset is performed, the figures in the date window move slightly up and down or right and left to tell you that the operation has been completed. Set the reference position.

  • Page 39: Maintenance

    Your watch needs an inspection once every two or three years for safety and longer usage. To keep your watch water-resistant, the packing needs to be replaced regularly. Other parts need to be inspected and replaced if necessary. Ask for genuine Citizen parts upon replacement.

  • Page 40: Specifications

    Specifications Model Type Analog solar-powered watch Timekeeping accuracy Within ±15 seconds per month on average (when worn at normal temperatures between 5˚C/41˚F and 35˚C/95˚F) Operating temperature range –10˚C/14˚F to +60˚C/140˚F Display functions • Time: 24 hours, hours, minutes, seconds • Calendar: Years passed since the last leap year, Month, Date Additional functions •...

This manual is also suitable for:

Eco-drive ctz-a8121

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