Yokogawa - PX8000 Precision Power Scope

Yokogawa - PX8000 Precision Power ScopeYokogawa - PX8000 Precision Power ScopeYokogawa - PX8000 Precision Power ScopeYokogawa - PX8000 Precision Power Scope
Traditional power measurement instruments cannot provide accurate time measurements; oscilloscopes are not designed to measure power. The PX8000 is the world's first precision power scope, bringing oscilloscope-style time-based measurement to the world of power measurement. It can capture voltage and current waveforms precisely, opening up applications and solutions for a huge variety of emerging power measurement problems. 
  • Released firmware Version 3.01
  • Released sensor power supply option (/PD and dedicated accessories)
  • Released dedicated software, PowerViewerPlus


Transient power measurements and analysis

The PX8000 has a number of innovative features that support the crucial measurement and analysis of transient power profiles. 

Simultaneous power calculation Provides simultaneous voltage and current multiplication to give real-time power sampling.
Cycle-by-cycle power trend measurement Trend measurements between waveforms can be calculated by mathematical functions (up to four million points). 
Specific time-period measurement Supports the capture of power parameters over specific periods of time through the definition of start and stop "cursors". 
Specified time-period waveform measurement Supports the capture of waveform parameters over specific periods of time through the definition of start and stop "cursors".
X-Y display and phase analysis Supports X-Y axis displays as standard. It can also display lissajous waveforms of input and output for phase analysis.
Capturing sudden or irregular phenomena An always-active History function automatically records up to 1,000 historical waveforms. 
Long-period data capture and analysis An accompanying PC application called PowerViewerPlus can be used to capture waveform data for further analysis. 
FFT analysis Features arithmetical, time-shift, FFT and other computations that enable users to display waveforms with offsets and skew corrections. 
Simultaneous harmonic measurement Makes it possible to simultaneously measure the harmonic components of voltage and current waves as well as the harmonic distortion factor. 
Multifunction snapshots Up to 16 different waveforms- including voltage, current and power, can be displayed side-by-side, giving engineers instant snapshots of performance. 
Detailed transient analysis Supports the measurement of all power waveform parameters between precisely defined start and stop cursors.
Trend calculation Built-in functions for the direct calculation of variables, such as root mean square (RMS) and mean power values, to enable the identification of cycle-by-cycle trends.
De-skew compensation Automatic de-skewing function eliminates offsets between current and voltage signals that may be caused by sensor or input characteristics.
Powered by isoPRO technology Offers industry-leading isolation performance at the highest speeds. Delivers the performance needed to develop high-efficiency inverters that operate at high voltages, large currents, and high frequency. 


The PX8000 is an immensely versatile instrument, unlocking precision power measurement capabilities for researchers working on everything from renewable power to advanced robotics. 

Inverter and motor testing

Electric and hybrid vehicles have many electrical and mechanical components, and overall performance evaluation requires measuring the efficiency of both. The PX8000's flexibility, accuracy and wide bandwidth make it ideal for drawing together the range of power readings needed to optimize the efficiency of boost circuits and inverters- two key elements in overall electric vehicle performance.

Wide bandwidth With a 12-bit resolution, 100 MS/s sampling, and 20MH bandwidth, the PX8000 can be used for accurate measurement of inverter pulse shaped, which can then be used to fine-tune inverter efficiency.
Transient measurement by cycle-by-cycle trend The ability to analyze cycle-by-cycle trends makes it ideal for the measurement of transient effects. When the load changes rapidly, engineers can gain insights that will enable them to improve the control of the inverter.
Harmonic and FFT analysis With both harmonic and FFT measurement capabilities, the PX8000 can measure fundamental waveforms from 20Hz to 6.4kHz. This is particularly useful for analyzing higher harmonic component and causes of noise in electromechanical systems.
Offset cancels by individual NULL function A common problem when testing inverter motors is the presence of ambient noise that can mean test values are nonzero even before testing begins. The PX8000's offset capabilities mean such effects can be nullified and specific inputs can be isolated for testing and analysis. 

Screen Shot 2014 01 09 At 4.26.18 PM

Reactor loss measurement of inverter boost circuits

A reactor is used to filter out noise and boost voltage levels prior to the use of an inverter. It consists of an electromagnetic material core and a coil. A main focus for electrical engineers is to reduce power loss across the total inverter system, and reactor performance is of particular interest. There are two potential evaluation methods: direct loss measurement of the reactor and iron loss measurement. The PX8000 supports either methodology because it can accommodate both high frequency measurement and low-power-factor conditions. 

Low-power-factor measurement Higher sampling rates and broad bandwidth make the PX8000 particularly useful for testing devices, such as transformers and reactors that have lower power factors. It is particularly important to measure the precise power consumption of such devices at high frequency.
De-skew functionality To analyze power consumption in low-power-factor devices it is particularly important to minimize any time differences between voltage and current caused by sensor input characteristics. The PX8000 provides precise de-skew adjustment to compensate for this time difference. 
Core loss measurement under high frequency Analyzing reactor core loss is an example of how the PX8000's user-defined functions can be utilized to provide an instant analysis of system performance. In the example below, core loss is calculated based on primary coil current and secondary coil voltage, while magnetic flux density (B) and magnetic field (H) are calculated by factoring in input frequency, cross-sectional area and other parameters. All values can be displayed directly by the PX8000. 

Screen Shot 2014 01 09 At 4.26.18 PM

Wireless charger efficiency measurement

The development of wireless charging technology for mobile devices like smartphones and tablet devices is a focus for research. Automotive manufacturers are looking into the possibility of charging electric vehicles wirelessly. Wireless charging depends on two electromagnetic coils being configured to support particular frequency profiles. Efficient power transfer and the prevention of power loss are naturally particularly important. The PX8000 is ideally suited for measuring such systems because of its ability to operate at high frequencies and low power factors.

Wireless charger efficiency evaluation To evaluate the efficiency of wireless transfer, at least three power measurement elements are required. The PX8000, with its four input channels, can analyze the performance of the whole system simultaneously.
Low-power-factor device measurement Higher sampling rates and broad bandwidth make it ideally suited for wireless power transfer systems. The PX8000 supports 12-bit resolution, sample rates of up to 100MS/s and a 20MHz bandwidth. The PX8000 supports the measurement of low-power-factor systems operating at very high frequencies.

De-skew functionality Because the PX8000 provides a de-skew function, differences between voltage and current that are introduced by sensor and input characteristics can be compensated for and eliminated from the analysis of low-power-factor systems. 


Screen Shot 2014 01 09 At 4.43.00 PM

Power distribution

Power distribution systems have to maintain constant voltage and constant power during load switching or in the case of a short circuit. Distribution protectors or circuit breakers for three-phase electrical systems must therefore be tested at transient voltage and power levels. The PX8000 can capture fluctuation voltage and current waveform, calculate power parameters (including voltage and current values), determine an average over a specified period and display all values.

Simultaneous three-phase data capture To evaluate three-phase electrical systems, at least three power measurement inputs are required. The PX8000 has up to four inputs and enables the simultaneous capture and display of voltage and current across all three phases.
Specific time-period measurement For a true evaluation of distribution protection, it is necessary to measure a full cycle of voltage current and power values half a cycle after the recovery from a short circuit. The PX8000 can easily be set up to focus on such a specific period.
Harmonic and FFT analysis The PX8000 has capabilities for both harmonic measurement and FFT for frequency analysis. The harmonic function can measure fundamental frequencies from 20Hz to 6.4kHz, and FFT has 1k to 100k points calculation across two channels. Such measurements are vital for identifying harmonic currents and identifying sources of noises. 

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Transient responses of industrial robots

To evaluate motor-driven robots, power consumption of all motors and controllers are measured throughout all operational speeds and action patterns. Design engineers need to measure inrush voltage, current and power over the pattern of repeated actions. Efficiency is calculated by comparing mechanical output with input power. During actual operating conditions, the time to accelerate and decelerate such motors can range from several hundred milliseconds to several seconds. As a PWM-driven motor rotates from the reset position to the top speed, the drive frequency from the rest position to the top speed, the drive frequency changes from DC to several hundred Hz. The PX8000 gives design engineers insight into power consumption and efficiency throughout a robot's operational performance. 

Specific time-period analysis Supports the measurement of waveform data between specific Start/Stop cursors. Combined with its multi-channel capabilities and its Long memory and History functions, this makes the PX8000 particularly useful in rating a robot's operational power consumption. 
Efficiency measurement of boosters, inverters and motors A single PX8000 unit can measure both the input/output power of inverters and the mechanical output of a motor. By installing three power units and one AUX module, the PX8000 can be configured to provide an instantaneous measure of component efficiency.

Transient measurement by trend computation With its instantaneous power calculations, the PX8000 is ideal for evaluation and optimizing transient effects. Its cycle-by-cycle trend analysis provides further insights into this crucial area of robotics engineering.

Longer time-period measurement To analyze some robotic operations, it may be necessary to perform cycle-by-cycle trend analysis over a long period of time. The PowerViewerPlus software extends this mathematical capability to enable deep insights to be obtained from the data.

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More Product Information

Yokogawa - WT5000 Precision Power Analyzer
The WT5000 is the Next Generation in Precision of Yokogawa’s Power Analyzers product line. It is a versatile platform that delivers extraordinary precision and exceptional performance for the most demanding applications. Equipped with 7 user swappable and reconfigurable input elements plus 4 motor channels, the WT5000 is an ideal instrument for both electrical and mechanical power and efficiency measurements. Its highly responsive touchscreen, intuitive menu operations, and out of the box software solution make the WT5000 an ideal instrument for your testing needs.

Sorensen - ASD FLX Series Programmable Precision High Power DC Power Supply
  • Precise programming of voltage and current slew rate for sensitive loads.
  • Industrial field bus interface (Modbus-TCP, Modbus-RTU, Ethernet) enable real-time digital control.
  • Built in power quality monitoring detects and saves input voltage anomalies which can be saved for later diagnostic analysis.
  • Programmable analog interface scaling facilitates integrating the ASD FLX with existing systems easily.
  • Built-in energy meter calculates the delivered energy throughout a process or period of time.
  • Optional real time clock enables accurate timestamping of events.

Sorensen - ASD Series 10kW-320kW Programmable Precision High Power DC Power Supply
  • Precise programming of voltage and current slew rate for sensitive loads.
  • Modules within one chassis can be connected to different loads and controlled independently.
  • Industrial field bus interface (Modbus-TCP, Modbus-RTU, Ethernet/IP (Industrial Protocol)) enable real-time digital control.
  • Built-in energy meter calculates the delivered energy throughout a process or period of time.
  • Optional real time clock enables accurate timestamping of events.
  • Built in power quality monitoring detects and saves input voltage anomalies which can be saved for later diagnostic analysis.
  • Programmable analog interface scaling facilitates incorporating the ASD to existing systems with minimal effort.
  • Load impedance measurement, including rate-of-change calculations, enable load "state of health" monitoring and implementation of system preventive maintenance algorithms
  • Programmable filter bandwidth of the output voltage, current and power monitors let the user accommodate their response speed to particular needs.
  • Full featured GUI (Graphical User Interface) helps to test and debug the system by communicating with the power supply in real time.

Sorensen - SG Series 5kW-30kW Modular Programmable Precision High Power DC Power Supply
  • High Power Density: up to 15 kW in 3U, 30 kW in a 6U chassis
  • Wide Voltage Range: 0-10V up to 0-1000V, from 4 to 30 kW
  • Fast Load Transient Response: Protection from undesired voltage excursions
  • Low Ripple and Noise
  • Hardware Trigger (Ethernet Option)
  • Parallelable up to 150 kW
  • Sequencing: Free system controller & speed up test
  • Low audible noise: Temperature controlled variable speed fans

Yokogawa - 2553A Precision DC Calibrator
The 2553A Precision DC Calibrator, like our other Calibrators and Sources, offers users the simple operation and reliability they have come to trust from Yokogawa.
  • Digital Display of Output
  • High Basic Accuracy
  • High Stability and Low Noise
  • High Resolution
With output ranges of ±10 mV to ±30 V and ±1 mA to ±100 mA plus 10 different types of Thermocouples and Pt100 RTD, the 2553A can effectively solve the calibration requirements for DC Analog Meters and various temperature measuring instruments and controllers.

Coherent Solutions - epIQ-Scope™ – Sampling Oscilloscope
  • 4 channel, 25 GHz bandwidth sampling oscilloscope
    • Cost-effective solution for high-speed data analysis across a broad range of applications: telecom and radar manufacturing, design of digital systems, optical fiber and transceiver testing and semiconductor characterization.
  • 16-bit vertical resolution
    • 16-bit vertical resolution generates crisp, high-resolution waveforms so you can generate more insight in less time.
  • 60 dB dynamic range
    • Get detailed and accurate insight into the low-intensity features of your signal with the high 60 dB dynamic range.
  • Direct and prescaled trigger input modes up to 15 GHz
    • epIQ-Scope operates with wide range of trigger frequencies either directly for repetition rates up to 2.5 GHz, or via a prescaling divider input for repetition rates up to 15 GHz.
  • Compact instrument with USB and Ethernet connectivity
    • epIQ-Scope’s compact size takes up very little benchtop space and makes it a portable, versatile instrument.
  • Product warranty
    • This product comes with a standard 1 year warranty. Optional 3 or 5 year extended warranties are also available.

Yokogawa - 2560A High Voltage and High Current Precision DC Calibrator
The Model 2560A is a simple, precise and cost effective solution for calibrating DC measuring instruments such as analog meters, thermometers, temperature transmitters and data loggers
The 2560A Precision DC Calibrator offers high voltage and high current generation and intuitive operation for the analog meters calibration.
  • Wide output range of voltage and current generation
  • Dials and switches for each digit and function
  • High accuracy, stability, and resolution
  • Various effective functions for analog meters calibration.
With output ranges of 100 mV to 1000 V and 100 µA to 30A, plus 10 different types of Thermocouples and Pt100 RTD, the 2560A can effectively solve the calibration requirements for DC Analog Meters and various temperature measuring instruments and controllers.

Yokogawa - LS3300 AC Power Calibrator
Built upon the technology of its predecessor, the 2558A, the LS3300 is an AC signal generator capable of outputting both current and voltage simultaneously, thus allowing it to calibrate power meters. Providing output ranges of  10mV-1250V, and 0.3 mA to 62.5 A, and upto 78.125 kW, the unit is capable of calibrating up to 0.15 % Class Power meters. New features on the LS3300 include a high definition LCD display, a vector diagram, and the ability to synchronize up to three units to emulate anything from single phase two wire to three phase four wire systems.

VTI Instruments - EX1032A 32-Channel Precision Thermocouple, 16-Channel Precision Voltage Measurement Instrument
  • 32 thermocouple channels, 16 voltage channels
  • Very high-performance thermocouple measurements, <0.3° C accuracy
  • Supports all thermocouple types
  • Built in cold junction compensation, open transducer detection, self-test and self-calibration
  • Supports wide range of static measurements and transducer types including thermocouples, RTDs, thermistors, strain gauge, pressure transducers, etc. using EX10SC signal conditioning modules
  • Signal conditioning configurable on a per channel basis
  • Sampling rates up to 1000 Sa/sec/ch
  • Standalone, compact 1U footprint
  • LXI compliant with IEEE-1588 and wired trigger bus for distributed, synchronized measurements
  • Unlimited expansion for High-Channel counts


Yokogawa has been developing measurement solutions for over 100 years, consistently finding new ways to give R&D teams the tools they need to gain the best insights from their measurement strategies. As well as offering a wide ranging product lineup and an extensive range of calibration and other services, the company has pioneered accurate power measurement throughout its history, and is the market leader in digital power analyzers.

Yokogawa instruments are renowned for maintaining high levels of precision and for continuing to deliver value for far longer than the typical shelf-life of such equipment. Yokogawa believes that precise and effective measurement lies at the heart of successful innovation – and has focused its own R&D on providing the tools that researchers and engineers need to address challenges great and small.

Yokogawa takes pride in its reputation for quality, both in the products it delivers – often adding new features in response to specific client requests – and the level of service and advice provided to clients, helping to devise measurement strategies for even the most challenging environments.

Contact Details

North America Headquarters - Texas

Yokogawa Corporation of America

12530 West Airport Blvd.

Sugar Land, TX 77478

Phone: (281) 340-2800

Sales: (800) 888-6400

Technical Support and Service: (800) 524-7378

Fax: (281) 340-3838

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