Some of the analysis VIs output in units of Vrms2. What does that mean?
This means that the VI’s output is in RMS (root-mean-square) units if the input sequence is in non-RMS units. The RMS value of a waveform can be calculated as the square root of the mean of the squares of each data point. It can be thought of as a kind of average, though not mathematically the same as the arithmetic mean. For example, the RMS amplitude of a sine wave of amplitude 1 would be 1/sqrt(2), or 0.707, while the average value of a sine wave (over an integral number of cycles) is 0.