Appendix A: Specifications
THS710A, THS720A, THS730A & THS720P User Manual
A–9
Oscilloscope Specifications (Cont.)
Power Measurements (THS720P)
True Power Measure-
ment
W +
1
n
ȍ
n
V
n
A
n
measured over an integral number of cycles that
contain n sample points
Apparent Power Mea-
surement
VA + V
RMS
A
RMS
Reactive Power Mea-
surement
VAR + (VA)
2
* W
2
Ǹ
Power Measurements
Accuracy
±4% at the BNCs (not including probe uncertainty)
PF Measurement
Power factor (PF) +
true power
apparent power
+
W
VA
q Measurement q is the phase difference between the fundamental components
of voltage and current. Positive angle means voltage leads
current. Negative angle means voltage lags current.
DPF Measurement
Displacement power factor (DPF) = cos q
Power Factor Measure-
ments Accuracy
±0.05