Yokogawa WT1806E Precision Power Analyzer

The Yokogawa WT1806E is a precision power analyzer delivering guaranteed 0.05% power accuracy for comprehensive electrical characterization across renewable energy, electric vehicle, and industrial applications. The instrument combines high-speed sampling at 2 MS/s with 16-bit resolution to capture instantaneous voltage and current waveforms from DC to 1 MHz, enabling accurate power efficiency evaluation and harmonic distortion assessment up to the 500th harmonic.

Technical Specifications

• Power accuracy: 0.05% of reading + 0.05% of range


• Sampling rate: 2 MS/s (16-bit resolution)


• Measurement bandwidth: DC, 0.1 Hz to 1 MHz


• Frequency bandwidth: 5 MHz (-3 dB, typical) for voltage and current


• Harmonic analysis: Up to 500th order (50/60 Hz fundamental)


• Input channels: Up to 6 channels Input Ranges


• Voltage (direct): 1.5 V to 1000 V with crest factor of 3 (ranges: 1.5/3/6/10/15/30/60/100/150/300/600/1000 V)


• Current (direct): 10 mA to 5 A or 1 A to 50 A


• External current sensors: 50/100/200/500 mV, 1/2/5/10 V outputs Filtering


• Analog filter: 1 MHz / 300 kHz options


• Digital filter: 100 Hz to 100 kHz (100 Hz increments, independently configurable per input)

Key Features

• Integration measurement for battery charge/discharge evaluation from high-speed instantaneous samples


• User-defined arithmetic expressions (up to 20 settable functions) for power loss and ripple factor computation


• Optional motor evaluation module: rotation speed, torque, mechanical power, electrical angle, and directional measurement via analog/pulse sensor inputs


• Optional dual harmonic measurement for simultaneous analysis of two sources (inverter input/output, motor configurations)


• Optional frequency measurement add-on


• Delta computation function for differential current measurement

Typical Applications

• Renewable energy system efficiency characterization


• Electric vehicle powertrain and charging analysis.


• Industrial motor and drive performance evaluation.


• Harmonic compliance assessment and power quality diagnostics.


• Battery management system testing.