WTViewerE Application Software

WTViewerE software enables PC connectivity for Yokogawa power analyzers such as the WT5000, WT3000E/ WT3000, WT1800E/ WT1800 , WT500 and WT300E/WT300 through Ethernet, USB, GPIB or RS232. With multichannel measurements, multi-unit connectivity and multilingual support, the WTViewerE allows users to easily control, monitor, collect, analyze, and save remote measurements from up to any 4 power analyzers simultaneously.
Furthermore, this software supports the waveform data streaming function using the WT5000.


Test Application:
●Automotive Power Train
●Wind Power Inverter
●Home/Office Appliances
●Solar Power Inverter
Yokogawa WT Series
Power Analyzers
WT3000E /
WT1800E /
WTViewerE WTViewerE
Power Measurement Software
  *Simultaneous connections of up to 4 units   Measurement , Remote Control
Multi-Unit Synchronization
Visualization and Analysis


Real-time Control
WTViewerE allows users to analyze and control remote measurements in real-time or use previously acquired data. In the online mode, users have real time control of measurements from each connected instrument, allowing them to remotely start or stop integration or collect live measurement values. In the offline mode as well users can analyze the latest acquired or previously stored data.

Multichannel Measurements
With the WTViewerE, users can simultaneously view up to 12 waveforms, 8 trends, 8 vectors and 6 harmonic bar graphs in split screen mode or zoom in using cursors for more detail on a particular area of interest. Users can also customize, save and load screen layouts as well as specify the data to be saved in CSV format. The software also allows users to create custom computations combining values from multiple power analyzers.

Latest Images

Measurement Screen (online)

Multi-unit Connectivity
WTViewerE enables synchronized measurement of up to four WT instruments in any combination regardless of model, element type or optional modules.
The software auto detects connected instruments and displays a list from which users can modify wiring systems, voltage and current ranges, update intervals, synchronization sources, display formats and other measurement conditions.

With customizable split screen display of readings in numeric, bar, trend or vector formats, the WTViewerE simplifies the acquisition, storage and analysis of multichannel measurements from up to 4 power analyzers simultaneously.

Analysis Screen (offline)

Analysis Screen (offline)

High Speed Waveform Capture and Synchronized Measurement of Waveform and Power Parameters

The WTViewerE and WT5000 /DS option (data streaming) enable acquisition of high-speed waveform data at up to 2 million samples per second (2MS/s) and easy synchronized measurement of waveform and power parameters. Acquired data can be saved or output to a CSV file.

The figure on the left shows a waveform acquired by data streaming over a duration of 1 second and the details of the waveform (magnified by 100 times).

Data Streaming Description
This function streams the waveform data measured by the WT5000 (voltage/current used as the base for power calculations or motor rotation speed/torque) continuously to a PC at a sample speed of up to 2MS/s without dead-time. With the WT5000 and a PC, the user can monitor high-speed sampled waveforms or save waveform data for extended time periods.

Since the streamed waveforms are synchronized with power parameters, analysis of both makes it possible to understand changes in the noise on the waveform or in the control state. Through changes in the waveform, more detailed analysis is possible, such as how a change in the noise or control state affect the power value and each parameter.

High Speed Waveform

Data Streaming Description

Ideal for multichannel power measurements

The WTViewerE allows users to :

  • Connect, synchronize and configure up to four power analyzers in any combination via Ethernet, USB, GPIB or RS232
  • Remotely monitor, collect, and analyze live or stored multichannel measurements in a numeric, bar, trend, or vector formats
  • Perform user defined computations combining values from multiple power analyzers.
  • Save or load configurations, measurement data, screen layouts and more.


WT Series Models WT5000
(firmware 3.01 or later)


WT3000 (760301/760302/760303/760304)
(firmware 6.11 or later)


(firmware 2.31 or later)

WT500 (760201/760202/760203)
(firmware 1.21 or later)


The WTViewerE allows simultaneous connection of different WT series models.
Example: WT3000E-WT1800E, etc.
It also allows simultaneous connection of the same models with different input element types/numbers or different options.
Display screen Measuring Item: Normal, harmonics, integration
Functions Display Screens: numeric, waveform*1, trend, harmonic list*2, Bar Graph*2 and vector*2*3
*1 Harmonic measurement option must be installed in the WT300 or WT300E.
*2 Harmonic measurement option must be installed in the WT.
*3 A vector window cannot be displayed on the WT300 or WT300E.
Data Acquisition Interval:50 ms at max. speed.
- The data storage period can be any custom settings (more than 20 seconds) and the data update rate of the product.

- Depends on your PC's processing speed, the communication interface is use, and the number of data points that the software is collecting from the WT.

- When the data acquisition interval is 500 msec or less, dropout of waveform data will occur on regular basis.
Data conversion
Numeric and Waveform data: CSV format (.csv)
Languages Supported English, Japanese, Simplified Chinese,
German, Italian, Korean, Russian,
Spanish, French, Hungarian

System Requirement

PC CPU Equivalent to Intel Core i5-2430M or better
Memory 4 GB or more recommended
Storage*4 1TB free space or more
OS English version of Windows 8.1, or Windows 10
Communication Board GP-IB NI (National Instruments)
On Windows 8.1: Use driver NI-488.2 Ver.3.1.0 or later.
On Windows 10: Use driver NI-488.2 Ver.15.5.0 or later.
On Windows 8.1: Use driver NI-488.2 Ver.3.1.0 or later.
On Windows 10: Use driver NI-488.2 Ver.15.5.0 or later.
On Windows 8.1.
On Windows 10: Use driver NI-488.2 Ver.15.5.0 or later.
RS-232 An available PC COM port
Ethernet An Ethernet port that supports 10BASE-T, 100BASE-TX, or 1000BASE-T
USB A USB port that supports USB Revision 1.1 or higher
Display, Printer, and Mouse Screen Resolution 1366×768 pixels or higher
Disk Drive A drive that can read CD-Rs
Operating System Must be compaible with the operating systems listed above.

*4 Storage Capacity
This software saves all displayed measured data.
Depending on the combination of setup items that affect the data size, the data may exceed 1 TB.


Reference: Measurement data size

Measurement time Normal Measurement Data Data Streaming Waveform Data
10 minutes Approx. 15 MB Approx. 5 GB
1 hour Approx. 88 MB Approx. 288 GB
1 day Approx. 2.1 GB Approx. 7 TB
1 month Approx. 63 GB ---
Measurement conditions: Normal Measurement Data Data Streaming Waveform Data
• Model WT1806/G6/DT/MTR WT5000/DS
• Number of connected devices 1 1
• Update interval 1 s 1 s
• Number of waveform display functions 2 2
• Number of numeric list display functions 3 3
• Number of bar display functions 1 1
• Data streaming waveform None Present
Sample rate: 1 MS/s

As the file size increases, the processing load for analyzing measured data may become extremely heavy.
The situation may improve by changing the storage medium.
(Slower) HDD < SSD < M.2.SSD (Faster)

WT5000 Data Streaming (/DS)

Conditions of Use

  • This software version: 1.51 or later
  • WT5000 firmware version: 2.01 or later
  • Online connection: USB3 or later or Gigabit Ethernet or later

Sample Rate during Data Streaming Waveform Acquisition and Maximum Number of Waveforms That Can Be Acquired

  Maximum Number of Waveforms
Sample Rate [S/s] USB3 Gigabit Ethernet
10 k 22 22
20 k 22 22
50 k 22 22
100 k 22 22
200 k 22 22
500 k 14 6
1 M 6 4
2 M 2 2
  • Use the data streaming waveform acquisition feature by connecting a single unit.
  • The update interval is fixed at 1 second during data streaming waveform acquisition.
  • The on/off state of the data streaming waveform function is synchronized to that of the waveform display.
  • Under Data Size Information, the required free storage size is displayed depending on the data acquisition time (hour/minute/second), which is based on the sample rate and number of waveform channels.
  • Prepare enough free storage according to the acquisition time.

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