【摘要】 在工频干扰模型基础上,通过对示波器和毫伏表的电源变压器漏电阻和等效漏电压典型值的测量,估算了工频干扰电压的幅度,从而说明电子测量系统各设备间共地连接的必要性,并介绍了共地方式在交流电桥等实践中的应用实例。更多还原

【Abstract】 Disturbing Voltage is estimated equivalently according to the measurement of the typical numerical values between the leakage voltage and leakage resistance from the equipment of the oscillograph and the millivoltmeter based on the working frequency disturbance model.It manifests the common-ground necessity of the equipment among the electronic measuring system.In addition,the applicable examples are introduced with the usage of common-ground link and AC bridge.更多还原