《中国数字测震台网技术规程》新增仪器精度指标，要求3种不同用途的地震计“在通频带内，幅频特性优于1%，相频特性优于5°”。本研究表明，在通频带下边沿周期与地震计工作周期相同条件下，几乎没有仪器能在长期只标不调的运行状态下能满足此规定。因使用工作周期偏差和阻尼偏差标定产品精度具有更好的直观性和可操作性，建议在颁发新技术规程时，将仪器精度修改为地震计工作周期偏差和阻尼偏差。

 Stipulation on China Digital Seismograph Network increased recently instrument precision parameters, which require three types of seismometer with different uses, “in transmission bands, a seismometer mplitude-frequence response should be less than 1%, and phase-frequence response should be less than 5° ”. Our research indicate that in the condition of transmission bands and the same work period, no a set of seismometers could be fit to this stipulation if the instrument not debug after long time running. So we are proposed that, in the new stipulation, the precision parameters change into work period and work damp relevance directly, because these two parameters could be measured during impulse calibration everyday.