scope:

This standard relates to crystal units fabricated from either natural or synthetic quartz. It gives general information and specifies general methods of test common to all types of quartz crystal units for frequency control and selection. The applicability of the test to each type of crystal unit and the specific requirements for each test will be given in the article sheet relating to that type. Object: To establish uniform conditions for assessing the mechanical, electrical and climatic properties of quartz crystal units, to describe test methods and to give terms, definitions and standard values.