WTViewerEfree Software (FREE)

The WTViewerEfree is free software for power analyzer models that include WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300. The software simplifies instrument configuration and gathering of measurements.

You can use the software to connect the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 series to a PC for access to the following:

  • Retrieve, display, and save data that the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 has measured and set up measurement parameters.
  • Remote control of a WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300.

  • * Firmware Ver. 2.31 or later is required for WT1800.
  • * Firmware Ver. 1.21 or later is required for WT500.
  • * Firmware Ver. 6.11 or later is required for WT3000. And it requires to dedicated advance mode setting.

You can use this software to control a single PC-connected WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300.

Setting Window

As well as using the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 series front panel to set up the power analyzer, users can apply the software to quickly set up desired settings. It also shows all the settings and the status at a glance. SettingWindow LG

SettingWindow LG

Measurement Window

The software can display items that cannot be shown on a screen of the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 series, such as multiple numeric measurement parameters, harmonics data of each other, bar graphs, trend graphs, vector, and voltage & current waveforms together. MeasurementWindow LG


The software has the following menus:

  • Connection: Used to configure the communication between the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 and PC.
  • Setting: Used to set WT3000E/WT3000/WT1800E/WT1800/WT500's measurement conditions.
  • Measure: Used to display measured results in bar graphs, trend graphs, etc.
  • File: Used to save and load setup parameters.
  • Exit: Used to close the software.

Types of Display Screens


Displays WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300's measurement data numerically. For models with the Advanced Calculation option (/G6), harmonic measurement data is also displayed.


Numeric List

Lists harmonic measurement data for each harmonic order. Numeric lists can be displayed when the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 is equipped with the Advanced Calculation option (/G6 or /G5).

Numeric list

Numeric Matrix

Displays WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 measurement data for each element.

Numeric Matrix


Displays waveform display data that has been collected from the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300.



Displays changes in measured data over time on a trend graph.

Numeric Matrix

Bar Graph

Displays measured harmonic components for each harmonic order. Bar graphs can be displayed when the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 is equipped with the Advanced Calculation option (/G6 or /G5).

Bar graph


Display harmonic measurement parameters (fundamental components) as a vector plot. Vector plots can be displayed when the WT3000E/WT3000/WT1800E/WT1800/WT500/WT300E/WT300 includes the Advanced Calculation option (/G6 or /G5) and more than 2 sets of the same input elements.



Measuring Mode Normal, harmonics, integration
Types of Files Waveform, calculated values, harmonics, settings
Display Screens Numerical, waveform, trend, harmonic bar graph* and vector plot*
* the /G6 option is required.
Data Acquisition Interval 50 ms at maximum speed.
- The data storage period can be any custom setting (more than 20 seconds) and the data update rate of the product.

- Depends on your PC's performance.* When the WT3000E/WT3000/WT1800E/WT1800/WT500 data update interval is shorter than the time it takes for the software to collect one set of measured data, there will be pieces of data that the software will not collect.

Function List

Display Numeric Data
Harmonic Bar graph
Types of Files Conversion to CSV
Data Acquisition Interval 50 ms at max. speed.

You can use this software to control a single PC-connected WT3000E/WT3000/WT1800E/WT1800/WT500. To control multiple PC-connected power analyzers from a single PC, please use the WTViewerE software application.

System Requirements

PC CPU Equivalent to Intel Core i5-2430M or better
Memory 2 GB or more recommended
HDD 10GB available free space or more
OS English version of Windows Vista, Windows 7, Windows 8, Windows 8.1, or Windows 10
Communication Board GP-IB NI (National Instruments, but Windows 10 is not supported)
On Windows Vista, Windows 7: Use driver NI-488.2 Ver.2.7.2 or later.
On Windows 8 or Windows 8.1: Use driver NI-488.2 Ver.3.1.0 or later.
On Windows Vista, Windows 7: Use driver NI-488.2 Ver. 2.8.1 or later.
On Windows 8 or Windows 8.1: Use driver NI-488.2 Ver.3.1.0 or later.
Use driver NI-488.2 Ver.14.0 or later.
RS-232 An available PC COM port
Ethernet 10BASE-T or 100BASE-TX compatible Ethernet port
USB A USB Rev. 1.1 or later USB port
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.

Apr 6, 2018

  • Updated software version to 1.33

WT1800 High Performance Power Analyzer

The WT1800 Power Analyzer offers maximum flexibility with up to six wattmeter elements, high bandwidths, simultaneous high speed digitizing, and wide voltage and current ranges. Although this model is still available, the newer WT1800E offers higher accuracy.

WT1800E High Performance Power Analyzer

The WT1800E is a flexible and reliable power analyzer that guarantees power accuracy of 0.05% of reading plus 0.05% of range. It is capable of harmonics analysis up to the 500th order of a 50/60 Hz fundamental frequency. With up to 6 input channels, a wide range of display and analysis features, and PC connectivity, the WT1800E can handle broad variety of power efficiency and harmonic analysis requirements.

WT3000E Precision Power Analyzer

The WT3000E is the world’s highest accuracy Power Analyzer with a basic power accuracy of 0.01% of reading + 0.03% of range.

WT300E Digital Power Meter

The WT300E series digital power analyzer provides extremely low current measurement capability down to 50 micro-Amps, and a maximum of up to 26 Amps RMS. This instrument is ideal for engineers performing stand-by power measurements, Energy Star®, SPECpower and IEC62301 / EN50564 testing, battery charger and other low-level power measurements.

WT500 Mid-Range Power Analyzer

The WT500 Power Analyzer excels at single- and three-phase power measurements. Standard features include a color TFT display and USB interface for communications and memory. The instrument has a basic power accuracy of 0.1%, maximum inputs of 1000 V, 40 A and a measurement bandwidth of DC to 100 kHz.

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