Yokogawa WT1800 High Performance Power Analyzer

The Yokogawa WT1800 is a power analyzer delivering precision measurement and analysis across power supplies, inverters, motors, and industrial loads. It combines dual-channel simultaneous harmonic measurement capability with extended harmonic analysis up to the 500th order, motor efficiency evaluation functions, and 2 MS/s sampling at 16-bit resolution. The instrument achieves ±0.1% basic AC power accuracy and ±0.1% power factor error, making it suitable for applications requiring stringent measurement fidelity and compliance validation.

Technical Specifications

• Harmonic Measurement: Simultaneous voltage, current fundamental, harmonic components, and THD analysis in Harmonic mode; conventional RMS measurements in Normal mode


• Harmonic Range: Up to 500th order at standard frequencies; up to 100th order at 50 ms update rate; capable at 400 Hz fundamental


• Dual-Line Harmonic Analysis: Two-line simultaneous harmonic measurements within single unit


• Frequency Range: 0.1 Hz to 400 Hz fundamental


• Sampling Rate: Approximately 2 MS/s, 16-bit resolution


• Data Update Rate: Nine selectable options from 50 ms to 20 s


• AC Power Accuracy: ±0.1% of reading


• DC Power Accuracy: ±(0.05% of reading + 0.1% of range)


• Power Factor Error: 0.1% of apparent power


• Voltage Bandwidth: 5 MHz (-3 dB, typical)


• Current Bandwidth: 5 MHz (-3 dB, typical)


• Voltage Input Range: 1.5 V to 1000 V across 12 ranges


• Direct Current Input Range: 10 mA to 5 A (9 ranges); 1 A to 50 A (6 ranges)


• External Current Sensor Input: 0.05 V to 10 V


• Maximum Input Elements: Six elements

Key Features

• Motor evaluation with rotation direction detection and electrical angle measurement


• Pulse and analog signal inputs for rotation speed and torque


• Total motor efficiency computation


• Low-frequency capability down to 0.1 Hz


• High-speed simultaneous multi-channel data collection

Typical Applications Power supply testing, inverter evaluation, motor characterization, harmonic distortion analysis, energy efficiency optimization, and standards compliance verification.