Yokogawa WT310EH Digital Power Meter

The Yokogawa WT310EH is a single-phase digital power meter engineered for high-accuracy AC and DC power measurements in compact form. It delivers ±0.15% basic power accuracy at 50/60 Hz across all ranges and supports simultaneous measurement of voltage, current, power, frequency, power factor, harmonics, and THD without mode changes. The instrument handles currents from 5 mA to 40 A RMS directly, with voltage measurement capability from 15 V to 600 V, making it suitable for applications ranging from low standby power measurements to high-current device testing.

– Technical Specifications

• Current input range: 5 mA to 40 A RMS
• Voltage measurement range: 15 V to 600 V
• Frequency bandwidth: DC, 0.1 Hz to 20 kHz
• Basic power accuracy (50/60 Hz): ±(0.1% of reading + 0.05% of RMS range)
• Basic DC accuracy: ±(0.1% of reading + 0.2% of RMS range)
• Data update rate: 100 ms maximum; auto-adjustable down to 0.1 Hz for fluctuating frequencies
• Crest factor: Up to 300 (or 6 A, depending on mode)
• Integration measurement: Energy (Wh) and charge (Ah) over extended periods up to approximately 10,000 hours
• Harmonics analysis: Up to 50th order (with optional -G5 configuration)

– Key Features

• High-speed auto-ranging in integration mode ensures continuous accuracy when input levels exceed selected ranges, eliminating test repetitions
• Auto-ranging function across selected measurement ranges
• Simultaneous AC and DC parameter measurement including harmonic and THD analysis
• Fast display update enables quick test procedures
• Automatic data rate adjustment for tracking motor frequencies and other variable input conditions
• Standby power measurement compliance with IEC62301, Energy Star, and SPECpower standards
• High measurement resolution: 100 µW on 5 mA range

– Typical Applications

• Low standby power characterization
• Induction cooker and high-current device testing
• Motor and variable-frequency equipment analysis
• Energy consumption profiling over extended durations
• Harmonic distortion assessment

– Compatibility & Integration

• USB (standard)
• GP-IB (optional; standard on -C1)
• RS-232 (selectable; standard on -C2)
• Ethernet via Modbus/TCP (optional -C7)
• External sensor input support