10.2 Basic Specifications
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4. Harmonic Measurement Specifications
Number of measurement channels 4 Channels
Harmonic measurements not available for multiple systems with different frequencies.
Measurement items Harmonic rms voltage, harmonic voltage percentage, harmonic voltage phase angle, harmonic rms
current, harmonic current percentage, harmonic current phase angle, harmonic active power, har-
monic power percentage, harmonic voltage-current phase difference, total harmonic voltage distor-
tion, total harmonic current distortion, voltage imbalance, current imbalance
Measurement method Zero-crossing synchronous calculation (all channels in same window), with gap
Fixed 500 kS/s sampling, after digital anti-aliasing filter
Equal thinning between zero crossings (with interpolation calculation)
Synchronization source U1 to U4, I1 to I4, External (with motor analysis and CH B set for pulse input), DC selectable (50 ms
or 100 ms)
FFT calculation word length 32 bits
Anti-aliasing filter Digital filter (automatically set based on synchronization frequency)
Windows Rectangular
Synchronization frequency range As specified for power measurements
Data update interval 50 ms (measurement-frequency-dependent at 45 Hz and below)
Phase zero adjustment Provided by key operation or external control command (only with external sync source)
The phase zero adjustment value can be set automatically or manually.
Phase zero adjustment setting range: 0.00° to ±180.00° (in 0.01° increments)
Highest order analysis and
window waveforms
Accuracy
Not specified for sync frequencies of 4.3 kHz and higher
Add the LPF accuracy to the above when using LPF.
Synchronization frequency range Window waveforms Analysis order
0.5 Hz f <40 Hz 1 100
th
40 Hz f <80 Hz 1 100
th
80 Hz f <160 Hz 2 80
th
160 Hz f <320 Hz 4 40
th
320 Hz f <640 Hz 8 20
th
640 Hz f <1.2 kHz 16 10
th
1.2 kHz f <2.5 kHz 32 5
th
2.5 kHz f <5.0 kHz 64 3
th
Frequency Voltage(U), Current(I), Active Power(P)
0.5 Hz f <30 Hz ±0.4% rdg.±0.2% f.s.
30 Hz f 400 Hz ±0.3% rdg.±0.1% f.s.
400 Hz < f 1 kHz ±0.4% rdg.±0.2% f.s.
1 kHz < f 5 kHz ±1.0% rdg.±0.5% f.s.
5 kHz < f 10 kHz ±2.0% rdg.±1.0% f.s.
10 kHz < f 13 kHz ±5.0% rdg.±1.0% f.s.
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