Citizen B740 Manual
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Citizen B740 Manual

Citizen B740 Manual

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Summary of Contents for Citizen B740

  • Page 2 IMPORTANT Before using When the watch does not operate according to the instruction manual, it is insufficiently charged. Charge the secondary battery of the watch for more than 4 hours, approximately 20cm (8in.) away from the fluorescent or incandescent lamp (30W) as light sources. When charging the secondary battery, do not put it too close to the light source.
  • Page 3 • The chronograph function measures the time in units of one second for 50 minutes at maximum. Any repair of this product should be conducted at a Citizen Service Center. For repair and inspection please contact the place of purchase or...

  • Page 4: Warning

    The instructions for safe operation are classified using the following symbols. • Before using this watch, carefully read this (The following are just examples of symbols.) instruction manual for safe and correct use. CAUTION • After reading this manual, keep it at hand for future reference.
  • Page 5 • Rapid and sharp change of the atmosphere and/or seawater temperature WARNING occasionally affects the indication and performance of the watch. Therefore, it is recommended that this watch be used together with another depth • Diving is one of the sports involving many risks. When using this watch for gauge.

  • Page 6: Table Of Contents

    CONTENTS WARNING ........... . .6 14.

  • Page 7: Before Using

    This instruction manual gives explanations of the model that indicates the depth 1. BEFORE USING in the metric system (m: meter) by way of example. If your watch is a different model that indicates the depth in the foot system (ft: “Battery”...

  • Page 8: Before Using For Diving

    2. BEFORE USING FOR DIVING CAUTION For safe diving • When diving, obey the rules of the buddy system* every time. CAUTION Before using this watch for diving • For safety, it is advised that you enjoy sports diving in the depths around •...
  • Page 9 PROHIBITION CAUTION Circumstances that prohibit use of this watch in diving Don’t use this watch for diving under the following circumstances. Matters that require attention to the watch before/during/after diving • When the function hand indicates “NG” on the charging level index. <Before diving>...
  • Page 10 Citizen Service Center about the trouble. surface of the water as that on the sea level (namely 0 m/0 ft in depth/altitude). In short, the watch always regards the surface of the water as the sea level (0 m/ 0 ft) except in a place 4,000 m (13,120 ft) or more above sea level.

  • Page 11: Names Of Parts

    3. NAMES OF PARTS a: Charge levels ....Charge level of the battery (battery power) is indicated as follows (LV.1, LV.2, NG) by the Collate the following table with the watch diagram on the first page. function hand. These guidelines indicate whether the depth meter function is usable or not.

  • Page 12: Warning Functions Of This Solar Powered Watch

    4. WARNING FUNCTIONS OF THIS SOLAR POWERED WATCH With decline of the battery power of this watch, its warning function is activated to change the indication. [Stop warning indication] [Time reset warning indication] Function hand: Points at “0”. Function hand: Points at “0”. Mode hand: Points at “0”.
  • Page 13 Charge level indication <When the function hand points at “LV.2” (54 seconds)> The battery is almost fully charged. Accordingly, the watch The function hand indicates the charge level as follows (LV.1, LV.2 and NG) to can be used reliably for diving. let the user know whether the watch can be used for diving or not.
  • Page 14 Insufficient charge warning function CAUTION Insufficient charge warning indication 2 seconds • Use the indication of the charge level as a reference only. — Mode hand: DV position, Function hand: NG position — 2 seconds • If the watch is exposed to strong light for charging the battery, the function Whenever the battery power becomes insufficient for hand may temporarily indicate “LV.1”...
  • Page 15   Stop warning function Time reset warning function 2 seconds 2 seconds Time reset warning indication Stop warning indication — Mode hand: “0” position,Function hand: “0” position — — Mode hand: “0” position, Function hand: “0” position — With progress in charging the battery as the watch If the watch is left in the insufficient charge warning indication for two days, both the mode hand and function hand will move to “0”...

  • Page 16: Time Required For Charging

    * Each time required for charging means a duration in which the watch is 5. TIME REQUIRED FOR CHARGING continuously exposed to the light indicated. Since time required for recharging the battery varies according to model (depending on the dial color, etc.), refer to the following table as a rough guideline for charging the battery.

  • Page 17: Special Care For This Solar Powered Watch

    6. SPECIAL CARE FOR THIS SOLAR POWERED • When the watch is exposed to an incandescent lamp for charging, carefully keep the watch 50 cm (20 in.) or more apart from it so as not to get the watch WATCH hot.

  • Page 18: Switching Between Modes

    7. SWITCHING BETWEEN MODES • If the water sensor gets wet while the watch is in time mode, the mode is switched over to the diving mode. However, this mode shift is not performed • Each time button A is pressed for two seconds, the mode is switched from when the function hand indicates “NG”...

  • Page 19: Adjusting Time And Date (Time Mode)

    8. ADJUSTING TIME AND DATE (Time mode) Manner to adjust time The watch shows time and date in the Time mode. Time can be adjusted in the Time mode. Besides time and date, the function hand indicates the battery power at three (1) After turning the crown counterclockwise to unscrew it, pull the crown out to levels.

  • Page 20: Diving Mode

    Note: If date is adjusted when the watch shows a time between 9:00 pm and 9. DIVING MODE 1:00 am, the watch may not advance the date indication the next morning. When the watch is immersed in the water, while it is set in the Time mode and <Note on operation of the crown>...
  • Page 21 <Depth indication> <How to cancel the Diving mode> Indication range: 0 to 50 m (0 to 125 ft) deep (measured every second) (1) Press button A for 2 seconds after diving or in the water where it is less than Indication unit: 1 m/5 ft (Decimals of five and above in the first decimal place are 1 m (5 ft) deep (depth indication: 0 m/0 ft).

  • Page 22: Chronograph Mode

    <How to recall the memorized maximum depth> 10. CHRONOGRAPH MODE (1) Press button B in the Time mode or Diving mode (when depth indication is 0 m/0 ft). The function The chronograph function enables this watch to measure time in units of 1 hand indicates the memorized maximum depth.
  • Page 23 <How to measure time> * The watch cannot be switched to the Chronograph mode from the Diving (1) In the Time mode, press and hold button A for 2 seconds or more to switch mode. the watch to the Chronograph mode. As a result, both the function hand and * If the function hand or/and mode hand do not reset to their respective “0”...

  • Page 24: Measures Against Possible Problems

    11. MEASURES AGAINST POSSIBLE PROBLEMS The second hand jumps 2 seconds every 2 seconds. Note this as the insufficient charge warning of a decline in the battery power. If it If the solar powered watch is insufficiently charged or its battery power is occurs, immediately recharge the battery sufficiently.
  • Page 25 Citizen Service Center. If the depth indication is less than 4 m (15 ft), press button A for 2 seconds or The watch malfunctions otherwise or shows abnormal reading.

  • Page 26: Setting Function Hand At "0" Position

    12. SETTING FUNCTION HAND AT “0” POSITION * The aforementioned procedure is effectual only when the hand is located within ±15 graduations before/after the “0” point. When the hand is located (1) Set the watch to the Time mode or outside the adjustable range, correct the “0”...

  • Page 27: All Reset/Adjusting Hand Position

    * If the ALL RESET/ADJUSTING HAND POSITION fails in clearing away the trouble, consult with the store where you purchased the watch or the function hand and mode hand to their nearest Citizen Service Center about the trouble. respective “0” positions. Button A: For adjustment counter- clockwise.

  • Page 28: Note On Secondary Battery

    14. NOTE ON SECONDARY BATTERY [How to use the rotating bezel] On starting a dive, turn the rotating bezel The secondary battery used in this watch is a clean energy battery that counterclockwise to set the triangle mark ( ) to the incorporates no toxic substance such as mercury inside.
  • Page 29 [No decompression limits] CAUTION The range within which the diver can rise to the surface without rest for decompression, is determined by the depth and elapsed time of the dive. The • The table of no decompression limits is provided for one-time diving. ranges are called “No Decompression Limits”.

  • Page 30: Proper Care For Long Term Use

    16. PROPER CARE FOR LONG TERM USE For maintaining the water-resistance For maintaining the water-resistance, ask the nearest Citizen Service Center directly or through the store where you purchased the watch to inspect the WARNING — About water-resistance — watch and to replace the packing, glass, crown, etc. if needed once a year or every two years.
  • Page 31 This luminous paint accumulates light of the sun and indoor lighting and emits nearest Citizen Service Center to overhaul it. If the watch is left in such light in a dark place. However, its luminance gradually fades because it condition, the inside will get rusty.
  • Page 32 CAUTION CAUTION — Operating environment — — Always keep the watch clean — • The case back and the space between the skin and watchband tend to get • Be sure to use the watch under specified temperatures described in this dirty and may get rusty.

  • Page 33: Specifications

    (gasoline, nail-polish, creosol, bathroom cleanser, adhesive, etc.), it function 2. Model ....B740/B745: Depth indication in meters may cause discoloration, corrosion, dissolution or other damage to the watch.
  • Page 34 6. Indications ... .• Time: Hour, minute, second, 24-hour, Charge 8. Duration of operation ..• From full charge to stopping of watch: 2 months level approx. • Date •...

This manual is also suitable for:

B745B741/b746

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