INSTRUCTION MANUAL
a b e 1 2 (B) 4 8 3 d 6 (A) c 7 g 5 f
IMPORTANT Before using When the watch does not operate according to the instruction manual, it is insufficiently charged. Charge the watch for more than 4 hours, approximately 20 cm (8 in.) away from the fluorescent or incandescent lamp (30 W) as light sources. When charging the watch, do not put it too close to the light source. * When charging the watch under direct rays of the sun, charge for more than an hour.
Safety Precautions (Instructions to be followed at all times) This manual contains the following instructions that should be strictly followed at all times to prevent injury to yourself and other persons as well as damage to property. ■ Injuries and damage that might be caused by using the watch improperly or neglecting any of the instructions or precautions contained in this manual are classified with the following symbols.
DANGER Please read this manual carefully to make sure you have a thorough understanding of the handling and operating procedures, displays and limitations of this watch and ensure its proper use. Improper use of this watch or failure to observe displayed warnings, cautions and instructions can result in the risk of a fatal or serious accident. CAUTION Diving is a sport that involves risk.
WARNING – Before using this watch for diving – Since the depth meter function of this watch is not approved as an official depth gauge, be sure to use this function as an auxiliary means to know the approximate depth. Diving is a sport that involves risk. Before using this watch while diving, be sure to receive diving instruction and training from a qualified instructor to acquire the experience and skills that are required for safe diving. Always observe the applicable rules.
WARNING Each diver should take responsibility for planning and executing his or her own diving plan to ensure safe diving. This watch is not equipped with a function that prevents decompression sickness. In addition, this watch is also unable to check differences in physiological functions of individual divers or differences in physical condition on that day.
CAUTION – For safe diving – • When diving, obey the rules of the buddy system every time. (Buddy system means that two divers pair with each other for safe diving.) • For safety, it is advised that you enjoy sports diving in the depths around 20 m (60 ft). • Before diving with this watch, fully charge the watch without fail. When the watch is not sufficiently charged (the function hand points at “NG”), the depth meter function cannot be used.
PROHIBITION – Circumstances that prohibit use of this watch in diving – Do not use this watch for diving under the following circumstances. • When the function hand indicates “NG” on the charging level index. … When the function hand indicates “NG” on the charging level, the watch will not measure the depth. If the function hand points at “NG” on the charging level during diving, immediately stop using the depth meter function of the watch since the watch discontinues depth measurement in this condition.
Precautions in diving WARNING – Before diving – • Check to see if the watch is set to the time mode. (When the watch is set to the chronograph mode, it will not shift to the dive mode.) • Check the indication of the function hand (on the charging level index). When the function hand points to “NG”, the watch will not shift to the dive mode because of insufficient charge. If the function hand points to “NG”, charge the watch sufficiently so that the hand indicates “LV.2 (level 2)” or “LV.1 (level 1)”.
WARNING – During diving – • Avoid quick ascending, otherwise you may suffer from submarine sickness or a functional disorder in some way. Whenever you ascend in water, carefully keep a safe speed. • Do not disturb any push buttons or the crown except button (B) (for displaying the memorized maximum depth) throughout the dive, otherwise the watch may fail in water-resistance. • If the watch does not operate correctly in the water, start ascending to the surface immediately.
CAUTION – Regarding diving at high altitudes or in fresh water – • If you intend to use this watch for diving in a high place or in fresh water, be sure to have a special education in safe diving beforehand. • Do not use the depth meter function of this watch in a high place 4,000 m (13,120 ft) or more above sea level, because the watch gives incorrect measurement of depth in such a place. • This watch indicates a depth based on the specific gravity (1.025) of seawater.
BEFORE USING Before using, make sure the watch is sufficiently charged by exposing it to the light. A rechargeable cell is used in this watch to store electrical energy. If the watch is fully charged once, it will continue running for about two months. When the watch is used for diving (about two hours a week), it will run for about one month (until NG is indicated). How to use this watch properly It is recommended that you charge the watch everyday.
CONTENTS Safety Precautions (Instructions to be followed at all times).................... 2 1. NAMES OF PARTS ................................................................................ 14 2. WARNING FUNCTIONS OF THIS ECO-DRIVE WATCH ....................... 16 Charge level indication/Insufficient charge warning function/ Stop warning function/Time reset warning function/ Overcharge prevention function 3. TIME REQUIRED FOR CHARGING ...................................................... 24 4.
11. ALL RESET/ADJUSTING HAND POSITION......................................... 48 12. NOTE ON RECHARGEABLE CELL ...................................................... 50 13. OTHER FUNCTIONS.............................................................................. 51 Rotating bezel/No decompression limits 14. PROPER CARE FOR LONG TERM USE .............................................. 54 15. SPECIFICATIONS ..................................................................................
1. NAMES OF PARTS Collate the following table with the watch diagram on the first page. Name Time mode Dive mode Chronograph mode (A): Button (A) To be pressed for selecting a mode (B): Button (B) To be pressed for showing the maximum depth left in the memory or for actuating the chronograph. 1: Function hand Indicates charging level. 2: Mode hand 3: Hour hand Indicates depth. Indicates second(s). Stops at DV position. Stops at DV position. Indicates minute(s). Always indicates the time (hour).
a: Charge levels (LV1, LV2,NG) ...... Charge level of the watch is indicated as follows (LV.1, LV.2, NG) by the function hand. These guidelines indicate whether the depth meter function is usable or not. b: Overzone mark ........................... When the diving depth exceeds 50 meters (125 feet) or there is something abnormal in the depth meter function, the function hand points to the overzone mark. c: Depth meter scale.......................
2. WARNING FUNCTIONS OF THIS ECO-DRIVE WATCH With decline of the charge of the watch, its warning function is activated to change the indication. [Normal indication (Time mode)] Function hand: Points at LV.2, LV.1 or NG. [Insufficient charge warning indication] Function hand: Points at NG.
[Stop warning indication] Function hand: Points at “0”. Mode hand: Points at “0”. As the charge declines furthermore: [Time reset warning indication] Function hand: Points at “0”.
Charge level indication The function hand indicates the charge level as follows (LV.1, LV.2 and NG) to let the user know whether the watch can be used for diving or not. In the dive mode, power consumption is increased as the pressure and water sensors are activated. If the watch is not fully charged before diving or exposure to moisture, it may not fully record your dive and/or may not enter the dive mode. Be sure your watch is fully charged by referring to the charge level indicated by the function hand.
The watch is almost fully charged. Accordingly, the watch can be used reliably for diving. The watch will not shift to the dive mode because of insufficient charging. When the watch is in this status, it cannot be used for diving because its depth meter function won't be activated. If the function hand points to “NG” during a dive, immediately stop using relying on the watch for depth measurement.
CAUTION • Use the indication of the charge level as a reference only. • If the watch is exposed to strong light for charging, the function hand may temporarily indicate “LV.1” or “LV.2” despite insufficient charging. If the function hand goes to “LV.1” or “LV.2” from “NG” position in a short time, you need to pay careful attention to charging conditions. It is recommended that you keep the watch sufficiently charged all the time but especially before using the watch for diving.
Insufficient charge warning function (Mode hand: DV position, Function hand: NG position) Whenever the power of the watch becomes insufficient 2 seconds for operation, the watch is automatically shifted to the time mode regardless of the currently set mode and the 2 seconds second hand goes for 2 second interval movement. (Insufficient charge warning indication) If the watch is left in this condition without recharging for another two days, the watch will stop.
Stop warning function (Mode hand: “0” position, Function hand: “0” position) 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” position respectively. If the watch falls into this condition, it indicates that the watch has stopped operation completely. (Stop warning indication) * All functions of the watch are inactivated in this indication.
Time reset warning function (Mode hand: “0” position, Function hand: “0” position) With progress in charging as the watch is exposed to light, it starts running but shows incorrect time. In this condition the second hand moves irregularly every two seconds to show that the time is incorrect. (Time reset warning indication) 2 seconds 2 seconds Charge the watch sufficiently and reset the time to return to the normal indication.
3. TIME REQUIRED FOR CHARGING Below are the approximate times required for charging when exposing the watch dial to light continuously. Please use this table as a reference only. Environment Charging time (approx.
* Each time required for charging means a duration in which the watch is continuously exposed to the light indicated. To become fully charged when the cell is discharged: Time required for fully charging the watch, starting from the state that the watch has stopped operation (in the stop warning indication). To work for one day: Time required for charging the watch enough to run for one day, starting from the state that the second hand normally goes every second.
4. PRECAUTION FOR THIS ECO-DRIVE WATCH • Mind that the charge of the watch becomes low if you wear a jacket or a longsleeved shirt, because the watch is usually shaded by such clothes and insufficiently charged as a result. • Try to put the watch in a well-lighted place, as far as circumstances permit, when you take it off. If you do, the watch will continue normal running.
WARNING — Note on handling the rechargeable cell — • Do not remove the rechargeable cell from the watch yourself, unless unavoidable. If you must remove the rechargeable cell, store it out of reach of children to avoid accidental ingestion. If the rechargeable cell is ingested, consult a doctor immediately. – Do not use anything other than the specified rechargeable cell – • The watch will not operate if incorrect battery types are inserted. Never use a regular silver battery.
5. SWITCHING BETWEEN MODES • Each time button (A) is pressed for 2 seconds or more, the mode is switched from the time mode to the chronograph mode and vice versa. • If the water sensor gets wet as the watch is in time mode, the mode is switched over to the dive mode. However, this mode shift is not performed when the function hand indicates “NG” on the charge level index.
(Indication in standby status) (Depth indication) When watch is at a depth of 1 m (5 ft) or more: When button (A) is pressed for 2 seconds or more as function hand indicates “0 m” (0 ft) in depth, or function hand continuously points at “0 m” (0 ft) in depth for 10 minutes after depth measurement is complete: When watch is at a depth of Function hand: “0” position less than 1 m Function hand: Depth indication Mode hand: “DV” position (5 ft): Mode hand: “DV” position 29
6. ADJUSTING TIME AND DATE (Time mode) The watch shows time and date in the time mode. Besides time and date, the function hand indicates the power of the watch at three levels. Time (shown by hour, minute, second and 24-hour hands) and date can be checked any time regardless of the mode.
How to adjust time Time can be adjusted in the time mode. (1) After turning the crown counterclockwise to unscrew it, pull the crown out to the time adjustment position (the second click stop position), the second hand will stop running. (2) Set the watch for the correct time by turning the crown. (3) Press the crown in to the normal position and the watch (second hand) starts running. (4) Turn the crown clockwise to screw it tightly against the case.
How to adjust date (1) After turning the crown counterclockwise to unscrew it, pull the crown out to the date adjustment position (the first click stop position). (2) Set the watch for the correct date by turning the crown. (3) Press the crown in to the normal position. (4) Turn the crown clockwise to screw it tightly against the case. Note: If date is adjusted when the watch shows a time between 9:00 pm and 1:00 am, the watch may not advance the date indication the next morning.
The crown of this watch is designed to be screwed down to secure the waterresistance of the watch. • For pulling out the crown for adjustment, unscrew it to get it loose first. • After adjustment with the crown, press it in to the normal position and then screw it down without fail. • Do not operate any button while the crown is being pulled out. If a button is operated in such the status, it may cause some change in the indication or disorder of some hand(s).
7. DIVE MODE When the watch is immersed in the water, while it is set in the time mode and charged enough for diving, the water sensor senses the water and automatically switches the watch to dive mode to measure the depth. In the dive mode, the watch automatically memorizes the maximum depth of the last dive (1 data) and the user can recall it after the dive.
Indication range: 0 to 50 m (0 to 125 ft) deep (measured every second) Indication unit: 1 m/5 ft (Decimals of five and above in the first decimal place are rounded up and anything under five in the first decimal place is rounded down. Depth less than 1 m/5 ft is indicated as 0 m/0 ft.) When the watch reaches the depth of 1 m/5 ft or more in diving, it starts measuring the depth. In diving, the indication by the function hand represents the depth.
(1) Press button (A) for 2 seconds or more after diving or in the water where it is less than 1 m (5 ft) deep (depth indication: 0 m/0 ft). The dive mode is canceled and the watch returns to the time mode. (2) When the watch is left for 10 minutes after diving or in the water where it is less than 1 m (5 ft) deep (depth indication: 0 m/0 ft), the watch automatically returns to the time mode with cancellation of the dive mode.
(1) Press button (B) in the time mode or dive mode (B) (when depth indication is 0 m/0 ft). The function hand indicates the memorized maximum depth. (2) To cancel the maximum depth indication, press button (B) again. * Indication of the memorized maximum depth continues for 30 seconds and is automatically canceled after that. * The memory of the maximum depth of the last dive is held until the watch is used in the next dive.
8. CHRONOGRAPH MODE The chronograph function enables this watch to measure time in units of 1 second for a maximum of 49 minutes 59 seconds. When it has reached 50 minutes, since a time measurement was started, the chronograph stops measuring time and the hands move to the reset position. Chronograph minute Chronograph second (B) (A) Mode hand: Serves as the minute indicator in chronograph mode. Function hand: Serves as the second indicator in chronograph mode.
(1) In the time mode, press and hold button (A) for 2 seconds or more to switch the watch to the chronograph mode. As a result, both the function hand and mode hand quickly go to their respective “0” positions and then stop. (2) Each time button (B) is pressed, both the hands start and stop alternately. (3) If button (A) is pressed while both the hands are stopped, the chronograph switches to the reset status. (A) Measure time (B) ▼ (B) ▼ Reset ▼ ▼ Stop (A) : Press button (A).
* The watch cannot be switched to the chronograph mode from the dive mode. * If the function hand or/and mode hand do not reset to their respective “0” positions when the watch enters the chronograph mode or the chronograph is reset, adjust the hand(s) to the “0” position referring to “9. TROUBLESHOOTING”. * The mode cannot be changed while the time is being measured in the chronograph mode. If the mode is changed while in the stop state of the chronograph mode, then indication is cleared.
9. TROUBLESHOOTING If the solar powered watch is insufficiently charged or power of the watch is considerably consumed, the watch functions are limited to a certain range and the watch warns the user of its status by various means such as abnormal indications. To avoid such a power failure, always try to charge the watch sufficiently. ● Some hand is out of the correct position. If a strong shock or static electricity is given to the watch by careless handling, the hands may show an incorrect indication.
● The second hand jumps 2 seconds every 2 seconds. This is the insufficient charge warning status that warns of a low charge of the watch. If it occurs, immediately charge the watch sufficiently. * For details, refer to “2. WARNING FUNCTIONS OF THIS SOLAR POWERED WATCH”. ● The second hand moves irregularly every 2 seconds. This is the time setting warning that warns of incorrect time indication caused by a temporary stoppage of the watch.
● The modes cannot be switched. If the power of the watch drops, the modes cannot be switched under the following conditions. • When the function hand points to “NG”, the watch cannot be switched over to the dive mode even if the water sensor gets wet. • When the watch is in the insufficient charge warning status, the mode cannot be switched over to the chronograph mode. In such a case, sufficiently charge the watch. * For details, refer to “2. WARNING FUNCTIONS OF THIS SOLAR POWERED WATCH”.
● The watch does not switch to the time mode from the depth indication. When the user climbs to a high place or is on a flight, the watch may unexpectedly be shifted to the dive mode because of a sharp change in the atmospheric pressure (pressure change equivalent to the depth of 1 m/5 ft). (The watch may enter the dive mode when the water sensor is activated by sweat or other moisture.
● The function hand continues to indicate the overzone mark. If the water sensor gets dirty or wet, it is activated even when the watch is not wet and the wet detection error indication (the function hand points to the overzone mark) appears. In case the watch falls into this status, carefully clean the water sensor part and wipe out moisture completely. After the water sensor is cancelled, the normal display will be resumed.
10. SETTING FUNCTION HAND AT “0” POSITION Within ±15 graduations before/after the “0” point. “0” position (B) (A) Adjusting position 46 (1) Set the watch to the time mode or chronograph mode. Turn the crown to loosen it and pull it out to the second click stop position. (2) Press button (A) or (B) to set the function hand to the “0” position. When the function hand is at the right side of the “0” position, press button (A).
* The aforementioned procedure is effectual only when the hand is located within ±15 graduations before/after the “0” point. When the hand is located outside the adjustable range, correct the “0” position of the hand referring to “11. ALL RESET/ADJUSTING HAND POSITION”. * If the watch has been left without any operation for 3 minutes or longer as the crown is pulled to the second click stop position, the function hand does not move regardless of button operation.
11. ALL RESET/ADJUSTING HAND POSITION Mode hand Function hand (B) (A) Adjusting position 48 (1) Unscrew the crown and pull it out to the second click stop position. (2) Press buttons (A) and (B) simultaneously. If the function hand moves slightly, the watch is reset in whole. (3) Press button (A) or (B) to set the function hand and mode hand to their respective “0” positions. Button (A): For adjustment counterclockwise. Button (B): For adjustment clockwise.
(4) Correct the time indication by turning the crown. (Refer to “6. ADJUSTING TIME AND DATE (Time mode)”.) (5) Press the crown in to the normal position and screw it down tightly against the case. As the crown is pressed into the normal position, the watch returns to the time mode and starts running. * After the watch is reset, the function hand points at “NG” position regardless of remaining power of the watch. Approximately 1 hour after resetting, the function hand will indicate the charge level.
12. NOTE ON RECHARGEABLE CELL The rechargeable cell used in this watch is a clean energy battery that incorporates no toxic substance such as mercury inside. The rechargeable cell has no need of periodical replacement because it is capable of repeated charging and discharging. However, power consumption may increase after using for an extended period of time due to deterioration, and the power may run out earlier than expected.
13. OTHER FUNCTIONS [Rotating bezel] The rotating bezel means the rotating ring set on the rim of the watch case. An elapsed time can be checked by this rotating bezel. • How to use the rotating bezel On starting a dive, turn the rotating bezel counterclockwise to set the triangle mark ( ▽ ) to the position where the minute hand is located. After that, the minute hand serves to indicate the elapsed time on the rotating bezel.
CAUTION • The rotating bezel can be turned counterclockwise only, to avoid malfunction. Be careful not to turn the rotating bezel clockwise by force, otherwise the rotating bezel may be damaged. • When using the rotating bezel, you are advised to read its indication just as a guideline. [No decompression limits] 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 ranges are called “No Decompression Limits”.
No Decompression — How to read no decompression limits — Limits N.D.TIME DEPTH.m (Max. depth in meter) (No decompression time) 12m (40ft) . . . . . . . . . 200Min 15m (50ft) . . . . . . . . . 100Min 18m (60ft) . . . . . . . . . 60Min 21m (70ft) . . . . . . . . . 50Min 24m (80ft) . . . . . . . . . 40Min 27m (90ft) . . . . . . . . . 30Min 30m (100ft) . . . . . . . . 25Min 33m (110ft) . . . . . . . . 20Min 36m (120ft) . . . . . . . . 15Min 39m (130ft) . . . . . . . . 10Min 42m (140ft) . . . . . . . .
14. PROPER CARE FOR LONG TERM USE WARNING — About water-resistance — • This watch is water-resistant against water pressure at the depth of 200 m. Although the watch can be used for scuba diving with an air tank, it cannot be used for saturation diving using helium gas.
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 watch and to replace the packing, glass, crown, etc. if needed once a year or every two years.
CAUTION • Do not use this watch unless the crown is screwed down into the normal position. Make sure that the crown is tightly screwed down against the case. • When either the watch or your hand is wet, don’t operate any button or the crown, except button (B), to prevent the watch from getting wet inside and deteriorated in water-resistance.
CAUTION — For repairing the watch — • This watch must be repaired by an authorized Citizen Service Center only. CAUTION — Note on the luminous dial — • The luminous paint used for the dial of this watch is mainly made from light accumulating materials, which are harmless to the human body and the environment since it contains no toxic substance such as a radioactive material. This luminous paint accumulates light of the sun and indoor lighting and emits light in a dark place.
CAUTION — Always keep the watch clean — • The case back and the space between the skin and watchband tend to get dirty and may get rusty. This may cause corrosion of the metal, clothes may be soiled by such dirt. To prevent this, try to keep the watch clean at all times. • Wipe the case and glass with a soft dry cloth to remove sweat and moisture from them.
CAUTION — Operating environment — • Be sure to use the watch under specified temperatures described in this owner’s manual. If not, it may stop or malfunction. • Do not wear the watch in a hot place such as a sauna, because the watch is easily heated in such a place and you may burn your wrist and other parts of your body. • Do not leave the watch in extremely hot locations such as the dashboard of a car. It may damage the plastic parts and cause malfunction.
• Be careful not to drop the watch on the floor, etc. • Don’t use the watch in an environment where the watch is exposed to chemicals or gases. If the watch is cleaned using thinner, benzine or other solvents (gasoline, nail-polish, creosol, bathroom cleanser, adhesive, etc.), it may cause discoloration, corrosion, dissolution or other damage to the watch. If the watchband or case is stained with mercury used in a clinical thermometer, etc., the stained part may be discolored.
15. SPECIFICATIONS 1. Model . . . . . . . . . . . . . . . . B740/B745 2. Watch accuracy. . . . . . . . . ±15 seconds per month (average) [at normal temperatures (+5°C to +35°C/+41°F to +95°F)] 3. Depth gauge accuracy . . . At depth of 1 to 10 m (5.0 to 25.0 ft): within ±1 m (±5.0 ft) At depth of 11 to 50 m (27.5 to 125.0 ft): within ±2 m (±7.5 ft) (On the condition that the water temperature is constant and error in reading is excluded.
5. Indications. . . . . . . . . . . . . • Time: Hour, minute, second, 24-hour, Charge level • Date • Chronograph: Minute, second (50-minute chronograph, reading in units of 1 second) • Depth gauge: 1 m to 50 m (5 ft to 125 ft) Reading in units of 1 m (2.5 ft) Depth less than 1 m (5 ft) is indicated as 0 m (0 ft). Depth more than 50 m (125 ft) is indicated as overzone. • Maximum depth to be memorized: 1 m to 50 m (5 ft to 125 ft) 6. Additional functions. . . . . .
7. Duration of operation . . . . • From full charge to stopping of watch: 2 months approx. • From full charge to NG indication: 1 month approx. • From insufficient charge warning to stopping of watch: 2 days approx. * Duration of operation greatly varies depending on frequency of use of the depth gauge and chronograph. If the watch gets wet, though it is not used in diving, the water sensor is activated and the duration is shortened accordingly. 8. Battery . . . . . . . . . . . . . . .
