This function measures phenomena such as power supply waveforms containing harmonic components, and the harmonic current flowing into or out of a commercial power system. Measurements are put through harmonic analysis up to the 40th order. Analysis parameters which can be selected are the root mean square value, content and phase angle of each harmonic order, and active power, power content, and power phase angle. This function also displays the overall root mean square value, overall distortion factor, active/reactive/apparent power, and power factor.
Waveform Observations (Examples) 
- 4-Channel Harmonic Analysis Capability
The OR300E has up to four isolated analog input channels. You can take measurements simultaneously on all channels, or perform harmonic analysis on each of them separately (the display switches between the different channels). A four channel recorder allows you to simultaneously measure three-phase current and simultaneously measure harmonic components superimposed on each layer (voltage output from a clamp probe can be scaled to current values).
- Two Analysis Modes for Different Applications
- Automatic Analysis Mode
Use this mode to automate the process of repeated measurement, analysis and display (or data saving) for selected calculation parameters. Automatic Analysis mode can also be used for harmonic power analysis.
- Waveform Analysis Mode
Use this mode for harmonic analysis of a waveform captured using the trigger functions. Analysis is performed starting at any specified cursor point. Waveform Analysis Mode can be used to display on one screen waveforms captured over as many as 1000 cycles, and to specify the desired area to be analyzed.
- Harmonic Triggers (available in Automatic Analysis mode)
A distortion factor trigger and a content trigger (for the harmonic component superimposed on each order) are provided as harmonic triggers. These triggers can be used as trigger sources when saving or faxing data.
- Use Analysis Results on a PC
Harmonic analysis results can be saved to a flash ATA memory card in CSV format for use with commercially available spreadsheet software. Analysis results can also be continuously saved (trend data) to a PC in order to check fluctuations over a fixed period in parameters such as content, distortion factor, and active/reactive/apparent power.
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Harmonic Analysis Result Trend Saving Capacity (approximate)
Data for approximately 40 days can be continuously saved when the following parameters are saved as trends over a one-minute period to a 10-MB PC card: RMS values, contents and phase angles of orders 3, 5, 7 and 9 (one channel), and overall distortion factor and overall RMS value. |
- Real-Time RMS Measurement Function
Real-time RMS Measurement mode can be set separately for each channel. This function is effective for monitoring for fluctuations in the root mean square value of power supply waveforms, etc. In addition, root mean square value fluctuation triggers can also be sensed.
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