Citizen B51 Instruction Manual Download

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14. Specifications

1. Caliber No.:

B51

2. Type:

Analog solar-powered watch

3. Accuracy:

Within

15 seconds per month on average (when worn at normal tempera-

tures: +5

C to +35

C/41

F to 95

F )

4. Operating Temperature Range:

-10

C to +60

C/14

F to 140

5. Display Functions:

Time (hours, minutes, seconds, 24 hours)/date

6. Additional Functions:

* Chronograph function: 0.2 second (1/5 second) units, 60 minutes
* Self-winding power generation function
* Insufficient charging warning feature
* Time setting warning feature

7. Continuous Operation:

* From fully charged to stopping - Approx. 5 months
* From 2-second interval movement to stopping -Approx. 1 day

8. Battery:

Secondary battery - 1

*Specifications are subject to change without notice.

Summary of Contents for B51

Page 1: ...A C B ...

Page 2: ... Secondary Battery 22 12 Using the Tachymeter When Provided 23 13 Precautions 24 14 Specifications 30 Make Sure the Watch is Sufficiently Charged Before Use Check that the second hand of the watch is moving correctly in 1 second interval movement before use If the second hand is moving in 2 second interval move ment or is stopped this indicates that the watch is not fully charged When this happens...

Page 3: ...that converts light energy to electrical energy it also is equipped with a self winding power generation function that converts movement of the watch produced by swinging the watch while wearing on the wrist into electrical energy Once fully charged the watch will continue to run for approximately 5 months without recharging In addition this watch is also provided with a chronograph function 60 mi...

Page 4: ...he opposite direction clockwise 3 Return the crown to the normal position Do not attempt to set the date between the hours of 9 00 PM and 1 00 AM Setting the date during this time may not result in the date changing on the following day If the crown is of the screw tightened type set the time and date after first loosening the screw Retighten the screw after the time and date have been set 3 Setti...

Page 5: ...Characteristic Functions of Solar PoweredWatches When the watch becomes undercharged the warning feature illustrated below is acti vated and the display of the watch movement of the second hand changes Normal Time Display 7 60 50 40 30 20 10 60 45 30 15 24 20 16 12 8 4 When undercharged When charged 1 second interval movement When fully charged and the time is set 45 30 Insufficient Charge Warning...

Page 6: ...alfunction 6 Charging Procedure 5 General Reference for Charging Times Case of Charging by Illuminating Solar Cell Only Charging times differ depending on the watch model type of face etc The charging times shown in the table below are meant to only serve as a rough indicator of required charging times The charging time indicated refers to the duration of continuous illumination Luminance Lux Envi...

Page 7: ... back and forth over a dis tance of about 20 25 cm 8 10 in at the rate of about 2 2 5 strokes per second Swing the watch for about 300 500 times strokes when it has stopped How to Effectively Charge the Watch by Swinging Examples Charging in close proximity to an incandescent lamp or halogen lamp which can easily reach high temperatures Charging in locations that can reach high temperatures such a...

Page 8: ... charging is only performed until the watch returns to 1 sec ond interval movement it will again return to 2 second inter val movement within a few minutes It is therefore recom mended to additionally charge the watch for at least one day s worth of charging by exposing to light or by swinging 200 300 times to ensure continuous operation 45 30 Charging will not proceed efficiently if the watch is ...

Page 9: ...ronograph minutes Time Setting Warning Feature After the watch has been recharged after having stopped due to being undercharged although the watch hands will begin to move the time will not be correct The second hand will begin irregular 2 second interval movement moving irregularly once every 2 seconds at this time indicating that the time is incorrect Reset the time after suffi ciently charging...

Page 10: ...ng procedure 60 50 40 30 20 10 Chronograph second hand Chronograph minute hand Normal position Crown Correcting position 2nd position A B Measuring Time with the Chronograph 1 Pressing button starts and stops the chronograph 2 Pressing button when the chronograph is stopped returns the chronograph to the reset display If button is pressed by mistake during chronograph measurement the chronograph w...

Page 11: ...n is longer than the time it is worn there are few opportunities to expose the watch to light or when the watch is not worn on the wrist the watch should occasionally be charged by swinging If the watch is only worn occasionally it may stop before it is worn as a result of being undercharged When this happens it is necessary to recharge the watch by exposing to light or swinging and then reset the...

Page 12: ... second hand Tachymeter 11 Secondary Battery CAUTION Handling of Secondary Battery Do not attempt to remove the secondary battery from the watch If the secondary battery should happen to be removed store it in a location out of the reach of small children to prevent it from being swallowed accidentally If the secondary battery has been swallowed consult a physician immediately and seek medical ass...

Page 13: ...uba diving with air tank The unit bar is roughly equal to 1 atmosphere 13 Precautions No indication OK Water resistant to 10 20 atmospheres Water resistant to 5 atmospheres Water resistant to 3 atmospheres Specifications WATER RESIST ANT WATER RESIST ANT 5 bar WATER RESIST ANT 10 20 bar OK WATER RESIST 10 20 bar or no indication WATER RESIST 5 bar or no indication CAUTION Water resistance performa...

Page 14: ...they may mar the finish Water resistance for daily use to 3 atmospheres This type of watch is water resistant to minor exposure to water For example you may wear the watch while washing your face however it is not designed for use underwater Upgraded water resistance for daily use to 5 atmospheres This type of watch is wa ter resistant to moderate exposure to water You may wear the watch while swi...

Page 15: ...age of the watch Do NOT use the watch in places where it is exposed to high temperature such as in a sauna Doing so may result in a skin burn Do NOT Ieave the watch in a place where it is exposed to high temperature such as the glove compartment or dash board of a car Doing so may result in deterioration of the watch such as deformation of plastic parts Do NOT place the watch close to a magnet Tim...

Page 16: ... Functions Time hours minutes seconds 24 hours date 6 Additional Functions Chronograph function 0 2 second 1 5 second units 60 minutes Self winding power generation function Insufficient charging warning feature Time setting warning feature 7 Continuous Operation From fully charged to stopping Approx 5 months From 2 second interval movement to stopping Approx 1 day 8 Battery Secondary battery 1 Sp...

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