The WT500 Power Analyzer is a Mid Range product for single-phase and three-phase power measurements. It is designed into a compact half-rack size chassis which can also be double rack mounted. Standard features include a color TFT display and USB interface for communications and memory. The instrument has a basic accuracy of 0.1%, maximum inputs of 1000 Vrms, 40 Arms and a measurement bandwidth of DC to 100 kHz.

- Simultaneous measurement of voltage, current, power, and harmonics
-  High-speed data updating (100 ms)
-  Display of numerical values, waveforms and trends
-  Measurement of bought and sold watt hours
-  Easy setup and operation

Current range: 0.5 to 40 A
Voltage range: 15 to 1000 V
Basic Power Accuracy: 0.1%
frequency range: DC 0.5 Hz to 100 kHz

Key layout offers intuitive control

  1. Cursor Keys
    Cursor keys can be used to move the on-screen cursor in four different directions. The cursor keys and SET key can also be used for making selections in soft menus. The WT500's menu structure is even more user-friendly than other models.
  2. RANGE Keys
    The RANGE keys can be used to set the voltage and current ranges. Quick intuitive range control is available by using direct keys.
  3. DISPLAY Keys
    DISPLAY keys can be used to switch between numerical values, waveforms, and other displays. The display format can easily be changed.
  4. SETUP Key
    The SETUP key can be used to enter various settings required for power measurement such as the wiring method and filters.
  5. FILE, IMAGE, and STORE Keys
    The keys related to data storage are located in the same area. Data can be easily stored to USB memory.
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  • Simultaneous measurement of DC and AC signals
    Evaluation of DC/AC signal conversion technology is critical in the renewable energy market. With input from 2 or more elements, the WT500 can measure DC and AC signals simultaneously and calculate input-to-output efficiency.
  • Separate integration functions for charge/discharge and bought/sold power
    The WT500 is equipped with integration functions that can not only evaluate charge and discharge current such as from secondary cells, but also bought and sold power in photovoltaic power generation systems.
  • Saving measured data directly to USB memory
    Measured data can be saved in CSV format directly to USB memory.
  • Easy setup with cursor keys
    Menu-type screen offers intuitive setting.
  • Simultaneous measurement of normal data and harmonic data with the harmonic measurement, /G5 option
    RMS voltage, RMS current, power values, and harmonic components up to the 50 order can be measured simultaneously.
  • WT series for power evaluation of energy-saving equipment 
    The WT series have been used as powermeters for Green IT, Energy Star, CO2 reduction and other energy-saving equipment. The WT series-Including the WT500--supports your power evaluation needs.

Newly Designed Architecture

Tm Wt500 03Intuitive control by using cursor keys in four different directions.
To reduce setting errors, menus display settings in order of relative importance in order.





Measured Value Direct Save Function

Tm Wt500 04Two USB ports for peripherals are installed for direct data saving (up to 1 G byte) in USB memory at shortest intervals. The saved data can be opened in applications such as Excel.

* Excel is a registered trademark of Microsoft Corporation in the U.S.A.





A Variety of Display Formats

Tm Wt500 05In addition to numerical data, the WT500 can display input signal waveforms and trends (time variation of numerical data).  Bar graph display and vector display are also available with the harmonic measurement (/G5) option.

*1 Waveforms of up to approximately 5 kHz can be displayed.
*2 Excludes single-phase models.
Split screen display for numerical values and waveforms is not available.







Simple Setting and Display of Efficiency

Two efficiency calculations can be set by selecting input elements or output elements from a list. Example: η1 = PΣ/P1 x 100% 
η2 = PΣ/P2 x 100%

USB Memory Storage Function

Tm Wt500 06Only necessary items within the measured data like voltage, current, and power can be saved
in USB memory in binary or CSV format (up to 1 GB).

Files saved in CSV format can be opened in general-purpose applications such as Excel to allow
displaying of data in graphs.


Variety of Integration Functions

Tm Wt500 07In addition to integration functions of active power (WP), current (q), reactive power (WQ), and apparent power (WS), a new feature provides measurement of bought and sold watt hours. Also, average active power can be calculated over an integration interval.
This feature is useful for evaluating the power consumed by intermittent-control instruments in which the power value fluctuates. Average active power is calculated by using user-defined settings.






GP-IB Communication (/C1)

 GP-IB communication enables you to control the WT500 or transfer data from a PC.

Ethernet Communication (/C7)

Tm Wt500 17Data can be transferred via Ethernet*communication.
It enables file transfers using an FTP server.

* 100BASE-TX 


External Current Sensor Input (/EX1, /EX2, /EX3)

Current can be measured by using current clamps without disconnecting power supply wiring (voltage output type). By setting an external current sensor conversion ratio, it can support various types of current clamp-on probes.

VGA Output (/V1)

By connecting to a monitor, you can create large displays of numerical values and waveforms. This function is convenient for simultaneously confirming data on multiple monitors, or to check data remotely.

Harmonic Measurement (/G5)

This function enables simultaneous measurement of normal and harmonic data. Harmonic components of up to the 50th order can be measured. With the WT500 you can simultaneously confirm voltage, current, and the distortion factor (THD) as well as measure the distortion factor without switching modes.

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Harmonic Dual List   THD measurement

Delta Computation (/DT)

This function allows you to calculate individual phase voltages and phase currents from the line voltages and phase currents measured in a three-phase, three-wire (3P3W) system. The phase voltage can be calculated from the line voltage measured with the three-phase, three-wire (3V3A) method. This is useful when you want to determine the phase voltage in a DUT with no neutral line by using the three-phase, three-wire (3V3A) method.

Note: This function cannot be installed on products with only one element. 

Added Frequency Measurement (/FQ)

In addition to the standard two channels of frequency measurement, an option is available for frequency measurement on all channels. This option provides frequency measurement of voltage and current on all channels with input elements 1 through 3 installed.This is necessary when you want to measure voltage and current frequency from the instrument's I/O as well as voltage and current frequencies of multiple items under test at the same time.

Note: This function cannot be installed on products with only one input element.

Rear Panel

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Standard feature

  1. Voltage input terminals 
  2. Current input terminals 
  3. USB communication interface 
  4. External trigger Signal, External clock input Connector
    Optional feature
  5. External Current Sensor Input Terminals (/EX option) 
  6. GP-IB communication Interface (/C1 option) 
  7. Ethernet Port (/C7 option) 
  8. VGA Output (/V1 option) 


Example of basic characteristics showing the WT500's high precision

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