Readings exhibit the effective voltage determined by the average value of samples in excess of an entire variety of intervals of the fundamental frequencyTrong ?i?u ki?n có th? MinhNgoc luôn Hello?n ho?c trong m?t kho?n th?i gian nh?t ??nh tr??c khi ?i?u ch?nh ?? b?n l?u ý nh?ng t?t nh?t b?n nên dùng ph??ng pháp t? ??ng ho?c xây d?ng hàm ??