Seiko 7D46 - Manual (Page 21)

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20 21
SPECIFICATIONS
1 Frequency of crystal oscillator .......................... 32,768 Hz (Hz = Hertz … Cycles per second)
2 Loss/gain (monthly rate) .................................... Less than 15 seconds (worn on the wrist at normal
temperature range 5 ºC ~ 35 ºC)
3 Operational temperature range ......................... –10 ºC ~ +60 ºC
4 Driving system
• Step motor: 2 pieces
One for the hour and minute hands moving at five-second intervals
The other for the second hand moving at one-second intervals
• Piezoelectric motor (For perpetual calendar): 1 piece
5 KINETIC electricity storage unit ........................ Button type, 1 piece
6 Continuous operating time
• Time relay function .................................. Approximately 4 years (if the watch is fully charged)
• After the second hand starts moving
at two-second intervals ........................... Approximately 12 hours
7 Additional functions ........................................... Power save function, Perpetual Calendar, Energy
depletion forewarning function, Overcharge prevention
function
8 IC (Integrated Circuit) ........................................ C-MOS-IC, 3 pieces
Oscillator, frequency divider, drive and charge control, auto-relay control circuit, calendar control
circuit
9 Generating system ............................................ Miniature AC generator
* The specifications are subject to change without prior notice for product improvements.
POWER SOURCE (KINETIC E.S.U.)
POWER RESERVE GUIDELINES FOR THE KINETIC E.S.U.
● Wearing the watch continuously for 12 hours will accumulate power to run the
watch for approximately one and a half additional days.
✽ As a general guideline, if you wear the watch every day for 12 hours over a period of a week,
the power to run the watch for approximately ten days will be additionally secured. If the
watch enters the power save mode, this amount of energy will keep the watch running for
approximately one month and a half.
This watch requires no periodic battery replacement as it is powered by the exclusive
secondary battery, which is completely different from conventional batteries for watches.
This exclusive secondary battery is an environmentally friendly, clean energy storage
device.
CAUTION
Never install a silver oxide battery for conventional watches in place of the
KINETIC E.S.U. , which can generate heat that can cause bursting or ignition.