YOKOGAWA WT333E - 1.2 Measurement Conditions; Voltage and Current Measurement Modes

1-5
IM WT310E-01EN
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Index
1.2 Measurement Conditions
Voltage and Current Measurement Modes (For procedures, see
section 2.1)
Youcanselectoneofthefollowingthreevoltagemeasurementmodes:RMS,MEAN(VOLTAGE
MEAN), and DC.
Youcanselectoneofthefollowingtwocurrentmeasurementmodes:RMSandDC.
RMS (True RMS)
The true voltage or current rms value.
T
1
T
0
(t)
2
dt
f(t) : Input signal
T : One period of the input signal
MEAN (VOLTAGE MEAN, rectified mean value calibrated to the
rms value)
One period of the voltage is rectified and the resulting average is multiplied by the factor that would
yield the true rms value if the applied signal were a sine wave. When sine waves are measured, the
valuesobtainedinthismodearethesameasthoseobtainedinRMSmode.Thevaluesdifferfrom
thoseobtainedinRMSmodewhendistortedwavesorDCwavesaremeasured.
T
1
(t) dt
f(t) : Input signal
T : One period of the input signal
2 2
·
T
0
π
DC (Linear average)
The average of one period of the voltage or current. This mode is useful for determining the average
value of a DC input signal or the value of a DC signal that is superimposed on an AC signal.
T
1
T
0
(t) dt
f(t) : Input signal
T : One period of the input signal