12.2 Measurement Specifications
188
Measurement accuracy
At 50/60 Hz measurement, Less than ±10 mHz (For a sine wave input with
a voltage range of 10% to 110%.)
At 400 Hz measurement, Less than ±100 mHz (For a sine wave input with
a voltage range of 30% to 110%.)
Frequency
Voltage Waveform Peak
Measurement method
Waveform consists of 256 points/cycle, measured every 12 or 10 cycles at
50 or 60 Hz, respectively (approx. 200 ms)
Waveform consists of 256 points/8 cycles, measured every 80 cycles at 400
Hz (approx. 200 ms)
Maximum and minimum sampling points within 200 ms
Display items
Positive peak value and negative peak value
Measurement range
Area of the RMS voltage range to which the crest factor was added.
Current Waveform Peak
Measurement method
Waveform consists of 256 points/cycle, measured every 12 or 10 cycles at
50 or 60 Hz, respectively (approx. 200 ms)
Waveform consists of 256 points/8 cycles, measured every 80 cycles at 400
Hz (approx. 200 ms)
Maximum and minimum sampling points in 200 ms
Display items
Positive peak value and negative peak value
Measurement range
Area of the RMS current range to which the crest factor was added.
Active Power
Measurement method
Waveform consists of 256 points/cycle, measured every 12 or 10 cycles at
50 or 60 Hz, respectively (approx. 200 ms)
Waveform consists of 256 points/8 cycles, measured every 80 cycles at 400
Hz (approx. 200 ms)
Calculated by averaging sampled voltage and current waveform data
Display items
Active power of each channel and its sum for multiple channels. (For details,
see the formula.(page 201))
Measurement range
Depends on the voltage × current range combination. (See the power range
configuration table (page 193).)
Measurement accuracy
At 50/60 Hz measurement, ±0.2% rdg. ±0.1% f.s. + clamp sensor specifica-
tion accuracy (power factor = 1)(The total is the sum of the channels used.)
At 400 Hz measurement, ±0.4% rdg. ±0.6% f.s. + clamp sensor specifica-
tion accuracy (power factor = 1)(The total is the sum of the channels used.)
Power factor influence
±1.0% rdg. (45 Hz to 66 Hz, power factor = 0.5)
±4.0% rdg. (360 Hz to 440 Hz, power factor = 0.5)
Polarity display
For influx (consumption) No symbol, For outflow (regenerative) "-"
Apparent Power
Measurement method
Calculated from RMS voltage U and RMS current I.
Display item
Apparent power of each channel and its sum for multiple channels. (For de-
tails, see the formula.(page 201))
Measurement range
Depends on the voltage x current range combination. (See the power range
configuration table (page 193).)
Measurement accuracy
±1 dgt. for calculations derived from the various measurement values. (sum
is ±3 dgt.)
Polarity display
No polarity
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