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Specications of Input, Output, and Measurement
Integration control All-channel synchronized integration:
• Manual (keys, communications commands, external) control:
Start, stop, data reset
• Real time control: Start, stop
• Timer control: Stop after a lapse of the set time.
Conguration-specic independent integration:
(No data will be saved.)
(It cannot be performed when the timing sync function or the 2-unit linking function
is enabled.)
• Manual (keys, communications commands, external) control:
Start, stop, and data reset by the wiring conguration
• Real time control: Start and stops by the wiring conguration
• Timer control: Stop by the wiring conguration after a specied time
Cumulative integration available
(Restarting after integration stop is available. Integration resumes, adding values to the
previous integrated values.)
(6) Specications common to harmonic measurement
Number of
measurement
channels
Up to 8 channels, depending on the number of installed input modules
Synchronization
source
Same as those specied in the basic measurement specications
Based on the synchronization source setting of the voltage, current, and power
measurement selected for each wiring conguration.
However, for the wiring conguration with Zph1 or Zph3 respectively selected as the
synchronization source of the voltage, current, and power measurement, you can choose
whether harmonic measurement is in sync with Ext1 or Ext3 or in sync with Zph1 or Zph3.
Measurement mode Wideband measurement mode
Measurement item Harmonic voltage RMS value, harmonic voltage content percentage,
harmonic voltage phase angle, harmonic current RMS value,
harmonic current content percentage, harmonic current phase
angle, harmonic active power, harmonic power content percentage,
harmonic voltage-vs.-current phase dierence, total harmonic voltage distortion,
total harmonic current distortion, voltage unbalance rate, current unbalance rate
FFT processible
word length
32 bits
Anti-aliasing Digital lter (automatically set based on synchronization frequency)
Window function Rectangular
Grouping O, Type 1 (harmonic sub-group), Type 2 (harmonic group)
(Setting common to all channels)
THD calculation
method
THD_F, THD_R
Select the calculation order from between 2nd and 500th. (However, limited to the
maximum analysis order of each mode.)
(Setting common to all channels)
(7) Specications of wideband harmonic measurement in wideband measurement mode
Measurement
method
Zero-crossing sync calculation method (the same window for each synchronization
source), with gaps
Fixed sampling interpolation calculation method
Synchronization
frequency range
0.1 Hz to 1.5 MHz (up to 1 MHz for the U7001)
Data refresh interval Fixed at 50 ms.
When it is set to 10 ms, only harmonic data is refreshed at 50 ms intervals.
When it is set to 200 ms, values are obtained by averaging four sets of 50 ms data.
Specications