By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.

为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。

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The effect on measurement of the isolator material and the magnitude of heating current inside the detecting head is discussed.

讨论了探头内部的绝热层材料和加热电流的大小对测量的影响。

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Inverse time current protection is judged by calculating the RMS of current and adding up heating effect.

长延时采用计算电流真有效值，累计热效应判别。

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The company, which provided mechanical and electrical services such as air conditioning, boiler maintenance and heating installation, said it was closing with immediate effect because of the current economic climate.

BBC: Aircraft seat company cuts jobs