With current measurements, the signal current becomes the input current of the measuring instrument. However, some background current is always present when no signal current is applied to the instrument input. This unwanted current is the input offset current (often called just the offset current) of the instrument.
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This technique requires making two voltage measurements with two different values of current.
这种技术需要利用两个不同的电流值进行两次电压测量。
With voltage measurements, the input current is ideally zero; thus, any input current represents an error.
对电压测量来说，理想的输入电流应为零，所以，一切输入电流都代表误差。
It's discussed that the method of RMS and frequency measurements directly from the wavelet transform data associated with each sampling sine voltage (current) element pair containing harmonic.
讨论了对含谐波的正弦电压(电流)采样值直接进行小波变换计算基波、谐波电压(电流)的有效值及频率的方法。
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