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13.3 Measurement Specifications

180

Apparent power (S)

Measurement method Calculated from RMS voltage U and RMS current I.

No polarity

Sampling frequency 200 kHz

Displayed item Apparent power of each channel and its sum for multiple channels.

(For details, see "13.10 Calculation Formula" (p.198))

Measurement range, resolution Depends on the voltage × current range combination.

(See "13.11 Clamp Sensors and Ranges" (p.211))

Measurement band See RMS frequency characteristics and consider clamp sensor measurement band.

Measurement accuracy 1 dgt. for calculations derived from the various measurement values. (sum is 3 dgt.)

Event threshold Power range

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

Reactive power (Q)

Measurement method Calculated using apparent power S and active power P.

Lag phase (LAG: current lags voltage): Unsigned

Lead phase (LEAD: current leads voltage): Negative