Gossen Metrawatt M817R Mains-analysis device, Mains analyser M817R データシート

3-8

Distortion Meter Tab

The Energy Platform is able to meter distortions or uncharacteristic changes in the 

waveform of original signals. Distortion calculations measure the deviation of complex 

waveshapes from pure sine waves. Harmonics are measured in accordance with IEC 

61000-4-7 Class I.

THD

(for A, B, C, D)

Voltage Total Harmonic Distortion 

Fundamental

V THD fund

Current Total Harmonic Distortion 

Fundamental

I THD fund

Voltage Total Harmonic Distortion Root 

Sum of Square

V THD RSS

Current Total Harmonic Distortion Root 

Sum of Square

I THD RSS

TID

(for A, B, C, D)

Voltage Total Interharmonic Distortion 

Fundamental

V TID fund

Current Total Interharmonic Distortion 

Fundamental

I TID fund

Voltage Total Interharmonic Distortion 

Root Sum of Square

V TID RSS

Current Total Interharmonic Distortion 

Root Sum of Square

I TID RSS

EP311