YOKOGAWA CW140, User Manual, Page: 188 / 292

IM CW140-E
19-8
(14) Harmonics mode
System PLL synchronization
Measurement frequency range
Fundamental wave frequency 45 ≤ f ≤ 65 Hz
Number of analysis orders 1 to 13
FFT data length 512
FFT processing word length 32 bits
Window function Rectangular
Sampling rate f × 256 Hz
Window width 2 periods of f
Display fields
Table display
Voltage and current RMS, content, phase angle, All-RMS, total
harmonic distortion (IEEE/CSA), fundamental
wave frequency
Power Power, power content, power phase angle, Total
electric energy, Total power factor, fundamental
wave frequency
Graph display
Voltage and current Total RMS, content, phase angle
Power Power, power content, power phase angle
Display accuracy
RMS, power ±(1.5% rdg + 1.5% rng): <1>
Content Value calculated from <1> ± 2 dgt
Phase angle ± 5 deg
Total harmonic distortion Value calculated from <1> ± 2 dgt
Logging function
The logging function can be used to take continuous measurements.
START setting MANUAL, TIME, TRIGGER (controlled)
STOP setting MANUAL, TIMER, TIME, TRIGGER
Output interval Can be set from a range of 2 minutes to 1000
hours (in one-minute increments).
The harmonic measure mode does not work with two-load systems.
19.1 Specifications