Current Distortion (THD) test for Production line (for WT310E)


Conventionally, measurement of the harmonic distortion required special modes or lengthy data acquisition times which impacted the processing time on manufacturing lines. New power meters can obtain the harmonics, harmonic distortion, and other data such as voltage, current at intervals as short as 100ms. This increases the efficiency of manufacturing on production lines with short process cycles. In order to reduce oscillation of harmonic current from such products, it should be tested with very accurate instrument according to IEC standard. Our WT3000E and 761922 software fit the requirement.


  1. Simultaneous Harmonics (DC-50th order) and Total.
  2. High Accuracy power consumption measurement: 0.1% of reading.
  3. High speed update rate: 100ms interval with all channels.
  4. Wide range communication interface USB, GP-IB, RS-232, Ethernet.

Customer Feedback

  • Simultaneous measurement every 100ms and variety communication interfaces.
  • RMS, DC, AC and VMEAN of voltages and currents simultaneously don’t switch without measurement mode.
  • it is possible that data monitoring of all measurement items and data recording by WTViewerFreePlus.


Related Products & Solutions

Digital Power Meter WT300

The WT300 offers high performance and high reliability in a compact package with excellent price value, making it ideal for multiple applications from R&D to manufacturing test. It is the fifth generation of Yokogawa's value series power meter, and the world's best selling power meter.

Precision Power Analyzer WT3000

With 0.02% accuracy and 1MHz bandwidth, the WT3000 delivers where the highest precision measurements are required. It is the industry standard for R&D work on inverters, motor drives, lighting systems and electronic ballasts, UPS systems, aircraft power, transformer testing, and other power conversion devices.

WT3000E - High Accuracy

  • High Accuracy Electrical & Mechanical Efficiency of Inverters and Motors in EV and HEV
  • IEC Harmonics (IEC61000-3-2 & IEC61000-3-12); Voltage Fluctuations and Flicker (IEC61000-3-3 & IEC61000-3-11)


WT300E - Economy

  • Standby Power Measurements, Energy Star®, SPEC Power® and IEC62301/EN50564
  • Evaluation and Testing of Batteries, Home Appliances and Uninterruptible Power Supplies (UPS)