Seiko 5J21 User Manual download pdf (Page 14)

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SPECIFICATIONS

1 Frequency of crystal oscillator ................... 32,768 Hz (Hz = Hertz … Cycles per second)

2 Loss/gain (Monthly rate) ............................ Less than 15 seconds at normal temperature range (5° C

~ 35° C) (41° F ~ 95° F)

3 Operational temperature range .................. –10° C ~ +60° C (14° F ~ 140° F)

4 Display system ........................................... Hour, minute and second hands

5 Driving system ........................................... Step motor, 2 pieces

6 Duration of charge

Validity of time relay function ................. Approximately 4 years (Full charge)

After the second hand starts

moving at two-second intervals .............. Approximately 12 hours

7 Additional function ..................................... Power save function, manual power save function, energy

depletion forewarning function and overcharge prevention

function

8 IC (Integrated Circuit) ................................. C-MOS-IC, 2 pieces

9 Generating system ..................................... Miniature AC generator

10 KINETIC ELECTRICITY STORAGE UNIT .... Button type, 1 piece

* The specifications are subject to change without prior notice for product improvement.

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Seiko 5J21 User Manual Page 14