The New PX8000 combines the technology of a Power Analyzer with an Oscilloscope to offer a new dimension in time-based power measurements.
Yokogawa has combined its experience as a world leader in the manufacture and sale of power analyzers with its long tradition of oscilloscope design to create the world's first Precision Power Oscilloscope: The PX8000.
The PX8000 brings oscilloscope-style time-based measurements to the world of power measurements. This new equipment can accurately capture voltage and current waveforms, opening the doors to new applications and solutions for a wide variety of current and emerging power measurement needs.
“The more innovation advances, focusing on power consumption and power-based electronics integration, the more and more engineers are demanding accuracy and precision in their power measurements,” says Terry Marrinan, Yokogawa Vice-President, Test & Measurement. , for Europe and Africa: "With the launch of the new PX8000, R&D professionals will see how a single team covers the needs they may have in time-based power measurements with maximum precision: a need that with the usual power analyzers and oscilloscopes do not contemplate at the same time.”
The power measurement capabilities of the PX8000 build on Yokogawa's long-standing reputation for accurate, stable, and repeatable measurements. The instrument also offers ease of use and a short learning period for the user, while maintaining characteristics similar to any power analyzer or oscilloscope.
The equipment has 12-bit vertical resolution with a sampling rate of up to 100 MS/s and 20 MHz bandwidth. This means that the PX8000 can be used for precise measurements of inverter pulse shapes, which can then be used to -finely- tune the efficiency of the inverter. A variety of input modules covering voltage, current, and sensor measurements up to voltages of 1000 Vrms and currents of up to 5 Arms (higher values are achieved through the use of external sensors), with a basic accuracy down to ±0.1 %. To evaluate three-phase electrical systems, at least three power modules are necessary. The PX8000 has up to four power modules and allows the simultaneous capture and display of the voltage and current of the three phases of a three-phase system.
In addition to providing the highest precision power measurements to provide a true understanding of power consumption and system behavior, the PX8000 incorporates a variety of innovative features to assist you in power profile measurement and analysis. It performs simultaneous voltage and current multiplication to calculate power in real time, supports both transient measurements (comes standard) and averaged numerical values throughout the sampling period. Up to 16 different waveforms – including voltage, current, and power – can be displayed simultaneously, giving engineers instant performance measurements.
The PX8000 is powered by Yokogawa isoPROTM technology that offers industry-leading isolation performance at the highest acquisition speeds. The isoPRO core technology, designed with energy-saving applications in mind, provides the performance needed to develop high-efficiency inverters that work at high voltages, large currents, and high frequencies.
The PX8000 has predefined functions for the direct calculation of variables such as RMS and average power values, to allow the identification of cycle-to-cycle trends.
The PX8000 displays voltage, current and power readings on its display, which can be examined for specific numerical values at any point or by calculations of average values over a given period. The equipment allows the capture of power waveforms during specific periods of time through the definition of beginning and end cursors. This is particularly useful in examining transient phenomena and in the design of periodically controlled equipment. To ensure that certain equipment meets energy standards, it is vital to measure energy consumption across the different operating ranges: from “idle” to full activity, as well as all states of operation in between. The PX8000 can display values on XY axes. This can be used, for example, to display the torque/speed characteristics of a motor. You can also display input and output Lissajous waveforms for phasor analysis.
Like Yokogawa's family of digital oscilloscopes, the PX8000 incorporates a history memory function that automatically stores up to 1000 previously captured waveforms. These waveforms can be recalled and viewed again at any time. They can also be used to redefine trigger conditions. The history waveforms can be explored through condition-based searches to locate abnormal phenomena, difficult to isolate during different high-speed measurements.
A variety of functions including but not limited to arithmetic, time offset, and FFT allow users to display waveforms with corresponding offset and offset corrections. The automatic de-skewing function eliminates phase shifts between voltage and current signals that may be caused by sensors or input characteristics. Users can also define their own calculations using equations that combine differentials, integrals, digital filters, and a host of other functions.
The PX8000 allows simultaneous measurement of current and voltage harmonics, as well as harmonic distortion. Harmonic measurements take place in parallel with conventional voltage and current measurements. The equipment measures up to harmonics of the order 500.
The PX8000 comes with a PC application called PowerViewerPlus that can be used to capture waveforms for post-hoc analysis. This extends the PX8000's ability to use math functions to analyze behavior over long periods of time. The connection to PC is via Ethernet/USB/GP-IB. The software is very user friendly and displays the waveforms in a simple and clear graph, similar to Yokogawa's popular Xviewer. Researchers who want to use their own analysis software will be able to connect to the PX8000 via Labview drivers.
Applications likely to use a PX8000 range from renewable energy to advanced robotics. In almost any location, power consumption has to be taken into account, since in most scenarios power is consumed, and the capabilities of the PX8000 can be used to accurately analyze these types of needs. Typical applications include inverters, motor testing, boost circuit measurements, industrial robot transient responses, wireless charger efficiency measurements, and voltage and power measurements in electricity distribution systems.
For more information on the PX8000, visit http://www.tmi.yokogawa.com/px8000.
