Yokogawa PZ4000 Power Analyzer

The Yokogawa PZ4000 Power Analyzer is a precision instrument for comprehensive electrical power measurement and analysis in research and development of energy-efficient products. It delivers high-speed sampling at 5 MS/s, detailed waveform capture, and harmonic analysis up to the 500th order, making it ideal for characterizing high-frequency power electronics and devices with complex waveforms.

Technical Specifications

Measurement Ranges and Accuracy

• Voltage: 30–2000 Vpk direct input (maximum 1000 Vrms)


• Current: 0.1–100 Apk depending on module configuration (maximum 20 Arms with 253752 module)


• Frequency bandwidth: DC to 2 MHz


• Sampling rate: 5 MS/s maximum


• Basic accuracy at 50/60 Hz: ±0.1% of reading + 0.025% of range (voltage/current and power); ±0.5% of S reading for power factor efficiency Analysis and Signal Processing


• Harmonic analysis capability to 500th order


• Fast Fourier Transform analysis up to 2.5 MHz


• Waveform capture and display with instantaneous power calculations


• Delta computation for fluorescent lamp ballast current measurement


• Vector display for 3-phase load balance assessment


• Motor evaluation with optional sensor module (253771): torque, speed, mechanical power, efficiency, synchronous speed, and slip Memory and Display


• Acquisition memory: 4 Mega Words per channel (expandable to 4 M word/CH)


• Color LCD: displays up to 64 measurement values and 10 waveforms simultaneously


• Data storage via floppy disk drive with optional SCSI interface for external media (HDD, MO, ZIP, PD)

Key Features

• Modular mainframe accommodates up to 4 plug-in power modules


• Synchronized multi-unit operation: Master-Slave configuration supports 8 channels with ±3 microsecond timing alignment


• Multiple current input options: direct measurement, current sensor input (100–1000 mVpk), or 253751/253752 modules

Typical Applications

• Power electronics R&D and device characterization


• Motor efficiency and mechanical parameter measurement


• Harmonic distortion and power quality analysis


• Fluorescent lighting ballast evaluation


• 3-phase system load balancing assessment

Compatibility & Integration

• Standard interfaces: GPIB, RS232-C, Centronics printer port


• Optional SCSI interface for data export


• External I/O connector for synchronized measurements and system control