Yokogawa WT210 Digital Power Meter

The Yokogawa WT210 is a half-rack digital power meter for precise AC and DC power measurement across DC to 100 kHz frequency ranges. Delivering ±0.1% of reading + ±0.1% of range basic accuracy, it measures voltage from 15 V to 600 V and current from 5 mA to 20 A, with capability to extend to 26 A. The instrument captures measurement updates as fast as 10 readings per second with display intervals as short as 0.1 seconds, enabling transient phenomenon capture.

An external sensor input option accommodates large-current measurement via /EX1 (2.5/5/10 V) or /EX2 (50/100/200 mV) configurations. The WT210 is recognized as an Accepted Device by the Standard Performance Evaluation Corporation (SPEC) for power efficiency benchmarking.

Technical Specifications

• Basic Accuracy: ±0.1% of reading + ±0.1% of range


• Input Voltage Range: 15 V to 600 V


• Input Current Range: 5 mA to 20 A (25 µA minimum on 5 mA range)


• Maximum Input: 26 A (rated 20 A, assured to 130%)


• Frequency Range: DC to 100 kHz (0.5 Hz to 100 kHz for AC; DC measurement 0.5 Hz to 100 kHz)


• Measurement Update Rate: 10 readings per second maximum; 0.1 second display intervals


• Data Storage: Internal memory; maximum integration time 10,000 hours


• Line Filter: 500 Hz cutoff frequency


• User Calibration: Available


• Accuracy Guaranteed Input: 1% to 130% of rated range

Key Features

• Harmonic analysis up to the 50th order harmonic


• MAX Hold function for peak voltage, current, and power values


• Integration measurement with polarity separation (positive/negative) and average active power for intermittent operations


• DC component measurement for intermittent and half-wave rectified signals


• IEC62301 standby power measurement compliance


• External I/O signals: EXT HOLD, EXT TRIG, EXT START, EXT STOP, EXT RESET, INTEG BUS


• D/A output (±5 V rating) with comparator function option (/CMP)

Interfaces and Integration

• GP-IB interface (Option: -C1)


• Serial RS-232-C interface (Option: -C2)


• External sensor inputs: /EX1 (2.5/5/10 V) and /EX2 (50/100/200 mV) for extended current measurement