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IEC 60689:1980 ed1.0

Заменен
Measurements and test methods for 32 kHz quartz crystal units for wrist watches and standard values — 17 стр.
Applies to 32 kHz quartz crystal units for wrist watches. Gives methods of measurement of resonance frequency, resonance resistance, frequency-temperature dependence and frequency pulling. Lays down test methods in accordance with IEC 68-2-6, 68-2-20, 68-2-21 and 68-2-27.
ICS
31.140 Piezoelectric devices / Пьезоэлектрические и диэлектрические приборы