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针对泵性能测试中，由调频器-调频电机动力系统带来的强电磁干扰问题，从抗干扰的基本方法入手，深入研究干扰源的频谱特征、干扰路径。并将其与信号源的特征相比较。从而以其信号强度为突破口，利用测试仪表的特殊性．提出了采用限压的抗干扰方法。并指出该方法可以在具有与流量测试相似的以电脉冲方式进行计量的其它测试中推广应用。
For the pump performance test, the strong electromagnetic interference brought by the FM-FM motor power system starts with the basic method of anti-jamming, and deeply studies the spectrum characteristics of the interference source and the interference path. And compare it with the characteristics of the signal source. Thus its signal strength as a breakthrough, the use of special instrumentation. An anti-interference method using voltage limiting is proposed. And points out that this method can be applied in other tests with the electric pulse mode that is similar to the flow test.