![YOKOGAWA ScopeCorder DL350 User Manual Download Page 191](http://html.mh-extra.com/html/yokogawa/scopecorder-dl350/scopecorder-dl350_user-manual_911346191.webp)
15-1
IM DL350-01EN
15 Harmonic Analysis
Harmonic Analysis (Harmonics)
Harmonics refer to sine waves whose frequency is an integer multiple (2 and higher) of the fundamental wave
except for the fundamental wave itself.
When the fundamental is mixed with harmonics, waveform distortion results.
The instrument analyzes the harmonics of rms values (voltage and current) and active power.
Harmonic analysis can be performed from the 1st order to the 40th harmonic for rms values and active powers.
Modules on Which Harmonic Analysis Can Be Performed
Harmonic analysis can be performed only when one of the following modules is installed.
720211 (HS100M12), 720250 (HS10M12), 720254 (4CH 1M16), 720268 (HV (with AAF, RMS)),
701261 (UNIVERSAL), 701262 (UNIVERSAL (AAF)), 701265 (TEMP/HPV), 720266 (TEMP/HPV),
701275 (ACCL/VOLT)
Measurement Functions
The various physical quantities such as rms voltage, average current, power, and phase difference that the
instrument measures and displays are called measurement functions. Each physical quantity is displayed with a
corresponding symbol.
Measurement Function Types
The following measurement functions are available.
• Rms Value Measurement Functions
RMS (rms values of the 1st to the 40th harmonic), HDF (percentage contents of the 1st to the 40th harmonic),
PHI (phases of the 1st to the 40th harmonic), FREQ (fundamental frequency), RMS (total rms value), THDIEC
(distortion factor: IEC), THDCSA (distortion factor: CSA)
• Active Power Measurement Functions
P (active powers of the 1st to the 40th harmonic), HDF (active power percentage contents of the 1st to the
40th harmonic), PHI (power phases of the 1st to the 40th harmonic), FREQ (fundamental frequency), U (total
rms voltage), I(total rms current), P (total active power), Q (total reactive power), S (total apparent power),
Lambda (power factor)
Voltage and Current Input Channels and Wiring Systems
Three-phase three-wire
Wiring system
720211 (HS100M12) example
(using current probes)
CH1
CH2
Voltage input
Current input
(using current probes)
CH3
CH4
Voltage input
Current input