8 Specifications
134
Quick Start Manual
Inter-Harmonic Voltage and Current
Measurement method
Per IEC61000-4-7:2002
After harmonic analysis, harmonic voltage and current are
summed and displayed as inter-harmonic contents with the
harmonic contents according to harmonic order
Harmonic analysis
window width
10 or 12 cycles for 50 or 60 Hz, respectively
Harmonic analysis
window
Rectangular
Harmonic analysis
frequencies
0.5 to 49.5 orders (of 42.5- to 69-Hz fundamental waveform)
Measurement accuracy
unspecified
Harmonic Voltage/Current Phase Difference (including fundamental
waveform content)
Measurement method
After harmonic analysis, the difference between harmonic volt-
age and current phase angles is displayed
Displayed items
Summed (total) value of harmonic voltage and current phase
angles for each channel and multiple channels (refer to the cal-
culation formula for details)
Measurement accuracy
(50/60 Hz)
1st to 3rd: ±2°, 4th to 50th: ±(0.02° x k+2°)(k:harmonic order)
(400 Hz)
1st to 10th: ±(0.16° x k+2°)(k:harmonic order)
However, clamp sensor accuracy must be included
Range of guaranteed
accuracy
Harmonic voltage and current level at each order are at least
1% of the range
Other Characteristics
Frequency characteris-
tic
69Hz to 1kHz:±3%f.s.
1kHz to 3kHz:±10% f.s. (RMS voltage and current),
±15% f.s. (active power)
Temperature character-
istic
AC: Within ±0.03% f.s./°C at 50 or 60 Hz measurement, Within
±0.05% f.s./°C at 400 Hz measurement (from 0 to 18°C
and from 28 to 40°C)
DC: Within ±0.1% f.s./°C (from 0 to 18°C and from 28 to 40°C)
Effect of common mode
voltage
±0.2% f.s. or less (600 Vrms, 50/60 Hz, between voltage input
terminal and instrument case)
±2% f.s. or less (600 Vrms,400 Hz, between voltage input ter-
minal and instrument case)
Effect of external mag-
netic field
±1.5% f.s. or less (in a magnetic field of 400 A/m rms AC, 50/
60 Hz)
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