Seiko 7D56, 7D48, 7D46 manual Specifications

32,768 Hz (Hz = Hertz … Cycles per second)

Less than 15 seconds (worn on the wrist at normal temperature range between 5º C and 35º C) Between –10º C and +60º C

English

SPECIFICATIONS

1 Frequency of crystal oscillator ..........................

2 Loss/gain (monthly rate) ....................................

3 Operational temperature range .........................

4Driving 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	Rechargeable battery	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.

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