IEC 60689:2008适用于10kHz至200kHz范围内音叉石英晶体单元的测量和测试方法以及频率控制和选择的标准值。 本版本包括与前一版本相比的以下重大技术变更: a） 第一版的标题是腕表用32kHz石英晶体单元和标准值的测量和测试方法。修改了标题，并将第二版的频率范围扩展到10kHz至200kHz的范围。 b） Lissajous方法在第一版中被定义为标准测量方法。第二版使用PI网络和桥接方法。 c） PI网络具有用于阻抗匹配的变压器。该组成与IEC 60444-1的组成不同。

IEC 60689:2008 applies to measurements and test methods for tuning fork quartz crystal units in the range from 10 kHz to 200 kHz and standard values for frequency control and selection. This edition includes the following significant technical changes with respect to the previous edition: a) The title of the first edition is Measurements and test methods for 32 kHz quartz crystal units for wrist watches and standard values. The title is modified and the frequency range of this second edition is extended to the range from 10 kHz to 200 kHz. b) The Lissajous method is defined in the first edition as the standard measurement method. The PI network and bridge method are used in this second edition. c) The PI network has a transformer for impedance matching. This composition differs from that of IEC 60444-1.