Yokogawa WT310E Digital Power Meter

The Yokogawa WT310E is a single-phase digital power meter engineered for precise AC and DC measurements across voltage, current, power, and frequency. It delivers simultaneous RMS, MEAN, and DC parameter acquisition with optional harmonic analysis to the 50th order and THD calculation. The instrument integrates energy and current over periods up to 10,000 hours, making it suitable for power supply evaluation, electronic device characterization, and energy consumption analysis in laboratory and field environments.

Technical Specifications

• Voltage (RMS): 15 V to 600 V


• Current (direct input): 5 mA to 20 A across 12 ranges (WT310E); 1 A to 40 A across 6 ranges (WT310EH)


• Lowest measurable current: 50 µA with specified accuracy


• Frequency bandwidth: DC, 0.1 Hz to 100 kHz (WT310E); DC, 0.1 Hz to 20 kHz (WT310EH) Accuracy & Sampling


• Basic power accuracy (50/60 Hz): ±(0.1% of reading + 0.05% of range)


• Voltage and current accuracy: ±0.1%


• Crest factor support: Up to 300


• Sampling rate: 100 kS/s, 16-bit


• Data update rate: 100/250/500 ms, 1/2/5/10/20 s, Auto


• Power factor influence: ±0.1% of S External Inputs


• EX1: 2.5 V, 5 V, 10 V


• EX2: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V

Key Features

• Active, reactive, and apparent power measurement


• Automatic range switching for integration mode measurements


• MAX Hold function for RMS/PEAK voltage and current, active, reactive, and apparent power


• Line filter and frequency filter for noise and harmonic rejection


• Comparator function with threshold setting capability


• Auto-ranging in normal and integration modes


• Two-channel frequency measurement (voltage and current)

Typical Applications Power supply characterization, standby power analysis, high-current device testing, harmonic content assessment, and long-duration energy integration studies.

Compatibility & Integration Standard USB interface with optional RS-232, GP-IB/IEEE488, and Ethernet (Modbus/TCP) connectivity. Optional 4-channel ±5 V D/A output available.