Yokogawa WT3004E Precision Power Analyzer

The Yokogawa WT3004E is a 4-channel precision power analyzer designed for high-accuracy measurement of electrical power parameters in power electronic devices, supplies, inverters, and demanding power applications. It delivers simultaneous voltage, current, and power measurement with ±0.2% reading accuracy and ±0.1% range accuracy across DC to 100 kHz. The instrument integrates harmonic analysis to the 50th order, energy integration functions, and a color LCD display for comprehensive power characterization across development, testing, and evaluation workflows.

Technical Specifications

• 4-channel simultaneous measurement: voltage, current, active/reactive/apparent power, frequency, power factor, crest factors, peak values, directional active/reactive power, and energy (Wh, varh, VA·h)


• Voltage: 15 V to 1000 V AC+DC; ±0.2% reading ±0.1% range accuracy (DC, 10 Hz to 20 kHz); 1 MΩ input impedance


• Current: 0.1 A to 20 A AC+DC; ±0.2% reading ±0.1% range accuracy (DC, 10 Hz to 20 kHz); 10 mΩ input impedance


• Power: ±0.3% reading ±0.2% range accuracy


• Sampling: up to 100 kS/s (1-channel voltage/current)


• Frequency bandwidth: DC to 100 kHz at rated current Harmonic Analysis


• Up to 50th order harmonics


• Measures harmonic voltage, current, and power


• 100 kHz resolution Integration Function


• Modes: Forward, Reverse, Auto


• Trigger options: Continuous, Manual, External Trigger


• Units: Wh, varh, VA·h Interfaces & Control


• USB Type-A for external storage


• Ethernet 10/100 BASE-TX for remote control and data transfer


• RS-232C


• GW-BASIC compatible command set Physical


• 430 mm × 177 mm × 575 mm (W × H × D); 15 kg


• 100–240 V AC, 50/60 Hz operation


• Operating: 0°C to 40°C; Storage: -20°C to 60°C

Key Features

• Simultaneous 4-channel measurement with ±0.2% voltage/current accuracy


• Harmonic analysis extending to 50th order at 100 kHz resolution


• Multiple integration modes with programmable trigger options


• Wide voltage range (15 V to 1000 V) and current range (0.1 A to 20 A)


• Color LCD display for real-time parameter visualization


• DC to 100 kHz measurement bandwidth

Typical Applications Power supply evaluation, inverter testing, switching power conversion analysis, renewable energy system characterization, motor drive assessment, harmonic distortion measurement, and power quality validation in industrial and laboratory environments.

Compatibility & Integration Ethernet and RS-232C connectivity enable remote operation and automated data acquisition. USB port supports direct file export. GW-BASIC command compatibility allows integration into custom test sequences and legacy control systems.