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• If seawater enters the watch, place the watch in a box or plastic bag and

immediately take it in for repair. Otherwise, pressure inside the watch will
increase, and parts (crystal, crown, buttons, etc.) may come off.

CAUTION: Keep your watch clean.

• Leaving dust and dirt deposited between the case and crown may result in

difficulty in pulling the crown out. Rotate the crown while in its normal
position, from time to time, to loosen dust and dirt and then brush it off.

• Dust and dirt tend to be deposited in gaps in the back of the case or band.

Deposited dust and dirt may cause corrosion and soil your clothing. Clean the
watch occasionally.

Cleaning the Watch

• Use a soft cloth to wipe off dirt, perspiration and water from the case and

crystal.

• Use a soft, dry cloth to wipe off perspiration and dirt from the leather band.
• To clean a metal, plastic, or rubber watchband, wash away dirt with mild soap

and water. Use a soft brush to remove dust and dirt jammed in the gaps in
the metal band. If your watch is not water-resistant, take it to your dealer.

NOTE: 

Avoid using solvents (thinner, benzine, etc.), as they may mar the finish.

17

Summary of Contents for Corso BM8400-50A

Page 1: ...POWERED WATCH 6 Insufficient Charge Warning Function 7 Quick Start Function 7 Overcharge Prevention Function 7 D CARE AND HANDLING DURING CHARGING 8 E ABOUT THE RECHARGEABLE CELL 9 F TIME REQUIRED FO...

Page 2: ...timum performance Always be sure to recharge the watch before it stops Your watch features an Overcharge Prevention Function so there is no need to worry about overcharging your watch A special energy...

Page 3: ...time 3 After setting the time firmly push the crown back into its normal position 3 Time setting position Crown Solar cell Normal position 1 Three hand models without calendar display If your watch h...

Page 4: ...eekday display If your watch has a screw type crown lift up the crown to loosen it before operation Be sure to press the crown down firmly after operation Date display models Date day of the week disp...

Page 5: ...date by turning the crown counterclockwise 3 Set the desired day of the week by turning the crown clockwise In the case of date display models turning the crown clockwise will result in the loose play...

Page 6: ...e warning display One second interval movement Two second interval movement If charged sufficiently If insufficiently charged When the watch is exposed to light the Quick Start Function will begin ope...

Page 7: ...movement Two second interval movement 2 sec 2 sec Quick Start Function The watch will stop if it is completely discharged It will begin to operate soon after it is exposed to light However the time to...

Page 8: ...it in as bright an area as possible Notes on recharging Avoid recharging your watch in areas of high temperatures over about 60 C 140 F otherwise the sensitive components of the watch may become damag...

Page 9: ...rechargeable cell should last the life of the watch Never allow anyone other than an Authorized Service Center to replace this cell The movement is designed to operate with only the original recharge...

Page 10: ...arging 10 Illuminance lux 500 Environment Inside an ordinary office Time required From the stop state to the one second movement 60 hours One day usage 4 hours Empty to full 1000 60 70cm 24 28in under...

Page 11: ...tely stopped One day usage Time required to charge the watch sufficient for one day use with one second interval operation 11 Empty to full CAUTION When recharging the watch after it is completely in...

Page 12: ...will stop functioning after about 1 week Insufficient Charge Warning Function In such a case expose your watch to light for a while to cancel the warning The second hand returns to moving at one seco...

Page 13: ...ing depends on the illuminance of the light Even so the second hand continues the hitch movement to tell you that the watch indicates an incorrect time because it had stopped In such a case set the ha...

Page 14: ...WATER RESIST or No indication WATER RESIST ANT Water resistant to 3 atmospheres WATER RESIST ANT 5 bar or WATER RESIST ANT Water resistant to 5 atmospheres WATER RESIST ANT 10 20 bar or WATER RESIST...

Page 15: ...ted on the dial and case and consult the table Examples of use Marine sports skin diving Scuba diving with air tank Operation of the crown with moisture visible NO NO NO NO NO NO OK NO NO NO OK OK Mod...

Page 16: ...or skin diving however it is not designed for scuba or saturated diving using helium gas CAUTION Be sure to use the watch with the crown pressed in normal position If your watch has a screw type crown...

Page 17: ...off Dust and dirt tend to be deposited in gaps in the back of the case or band Deposited dust and dirt may cause corrosion and soil your clothing Clean the watch occasionally Cleaning the Watch Use a...

Page 18: ...ove 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 Timekeeping will become inaccurat...

Page 19: ...t with the watch discoloration melting cracking etc may result If the watch comes in contact with mercury used in thermometers the case band or other parts may become discolored Periodical inspections...

Page 20: ...features Time hour minute second Calendar date day of the week Models with calendar display 7 Additional features Insufficient charge warning Quick start Overcharge prevention 8 Duration time Approx 6...

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