Yokogawa WT230 Digital Power Meter

The Yokogawa WT230 is a compact, half-rack digital power meter engineered for precise AC and DC power measurements across a broad spectrum of applications. It delivers 0.1% basic accuracy on voltage, current, power, power factor, and frequency measurements, with support for DC operation to 100 kHz and maximum assured accuracy to 26 A. The instrument integrates harmonic analysis, multi-mode integration (up to 10,000 hours), peak value capture, and MAX HOLD functions for both steady-state and intermittent load characterization.

User calibration capability and external sensor input accommodate non-standard measurement scenarios. High-speed data acquisition - up to 10 readings per second - combined with selectable display update rates from 0.1 to 5 seconds enables real-time power quality assessment. Dual synchronization modes (voltage, current, or entire period) and configurable line and frequency filters (500 Hz cutoff) provide measurement flexibility across equipment types from low-frequency supplies to high-frequency inverters.

Technical Specifications

• Measurement Accuracy: 0.1% of reading (basic); DC power 0.3% of reading + 0.2% of range; AC power 0.1% of reading + 0.1% of range


• Frequency Range: DC measurement 0.5 Hz to 100 kHz; voltage/current frequency to 100 kHz


• Maximum Input: 26 A with assured accuracy; supports 1 to 130% of rated range


• Data Update Rate: 10 readings per second; display rate selectable at 0.1, 0.25, 0.5, 1, 2, or 5 seconds


• Integration Modes: Standard (timer), continuous (repeat), manual; maximum integration time 10,000 hours


• Harmonic Measurement: Available


• User Calibration: Available


• Line/Frequency Filters: 500 Hz cutoff frequency


• DC Component Measurement: Yes


• Peak Value Display: Yes


• Polarity-Based Integration: Positive and negative power and current separation supported

Key Features

• External sensor input for large-current measurement beyond 26 A


• MAX HOLD function for voltage, current, and power


• Average active power display for intermittent operation analysis


• Measurement synchronization selectable across three modes


• Power supply: 100 to 240 VAC; maximum consumption 55 VA

Compatibility & Integration

• Standard Interfaces: USB, GPIB (IEEE 488.1-1978, IEEE 488.2-1992), RS-232-C (1200–9600 baud)


• Optional Interfaces: Ethernet, D/A output (/DA4, /DA12), comparator output (/CMP)


• External I/O: Remote control, D/A output, and comparator function connectors