DC Estimate
A Hanning window is applied to give a "processed waveform" and the voltage average is calculated with the following equation:
voltage average = (Σ processed waveform[i] ) / (cg × numPoints),
where the coherent gain (cg) of the Hanning window is 0.5 – the DC gain of the window.
The algorithm minimizes the effect of an uneven number of waveform cycles. For example, performing a simple voltage average on 5.5 cycles of a sine waveform gives a slightly incorrect DC estimate if the extra half cycle is not evenly divided between the positive and negative portions of the sine wave.
Units
Volts