13.3 Measurement Specifications
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Chapter 13 Specifications
Active power (P)
Measurement method Measured every 10 cycles (50 Hz) or 12 cycles (60 Hz) (approx. 200 ms aggregation).
During 400 Hz measurement, measured every 80 cycles (approx. 200 ms aggregation)
Includes zero suppression.
Sampling frequency 200 kHz
Displayed item Active power for each channel and sum value for multiple channels
(for more information, see "13.10 Calculation Formula" (p.198))
Sink (consumption) : Unsigned
Source (regeneration) : Negative
Measurement range, resolution Combination of voltage × current range (see "13.11 Clamp Sensors and Ranges" (p.211))
Measurement band See RMS frequency characteristics and consider clamp sensor measurement band.
Measurement accuracy When the measurement frequency is set to 50/60 Hz:
0.2% rdg.0.1%f.s. + clamp sensor accuracy (sum value is sum for channels being used)
When the measurement frequency is set to 400 Hz:
0.4% rdg.0.6%f.s. +clamp sensor accuracy (The total is the sum of the channels used.)
Event threshold Comparison of power range absolute values
Event IN Start of approx. 200 ms aggregation in which the absolute value was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which the reading was less than (threshold - hysteresis)
following the EVENT IN state
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms
Active energy and reactive energy (WP+, WP-/WQLAG, WQLEAD)
Measurement method Measured every 10 cycles (50 Hz) or 12 cycles (60 Hz) (approx. 200 ms).
During 400 Hz measurement, measured every 80 cycles using the 8-cycle waveform (approx. 200
ms).
Integrated separately by consumption and regeneration from active power.
Integrated separately by lag and lead from reactive power.
Recorded at the specified TIMEPLOT interval. Data is updated every 10 cycles (50 Hz), 12 cycles
(60 Hz), or 80 cycles (400 Hz) (approx. 20 ms).
Integration starts at the same time as recording and continues to previous TIMEPLOT update at
termination of recording.
Sampling frequency 200 kHz
Displayed item Active energy: WP+ (consumption), WP- (regeneration)
Sum of multiple channels (for more information, see "13.10 Calculation Formula" (p.198))
Reactive energy: WQLAG (lag), WQLEAD (lead)
Sum for multiple channels (for more information, see "13.10 Calculation Formula" (p.198))
Elapsed time
Measurement range, resolution Combination of voltage × current range (See "13.11 Clamp Sensors and Ranges" (p.211))
Measurement band See RMS frequency characteristics and consider clamp sensor measurement band.
Measurement accuracy Active energy : Active power measurement accuracy 10 dgt.
Reactive energy : Reactive power measurement accuracy 10 dgt.
Cumulative time accuracy : 10 ppm 1 s (23C [73F])
Event threshold N/A
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