I am beginer to Labview. I want two measure phase difference between two sinusoidal waveforms. These waveforms are acquired from current and voltage sensors. I am using NI USB 6008. I want to measure the accurate and constant phase difference between two waves to measure the power factor. By using builtin Dual Channel Spectrum pallet in LabVIEW 2010 I am having a continously changing phase. How can I have the constant and accurate phase of these waves. My VI is attached. Kindly help me regarding this problem.
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