The Yokogawa WT1805E Precision Power Analyzer delivers ±0.05% basic power accuracy across demanding electrical characterization tasks in R&D, manufacturing, and energy efficiency assessment. This six-channel instrument simultaneously measures power, voltage, and current with 2 MS/s sampling at 16-bit resolution, enabling precise analysis of complex electrical systems from DC to 1 MHz bandwidth (5 MHz typical at -3 dB).
Technical Specifications
Measurement Accuracy
• Basic Power Accuracy: ±0.05% of reading + ±0.05% of range (1% to 110% of selected range)
• Voltage/Current Accuracy: ±0.1%
• Power Factor Error: 0.1% of apparent power
• Crest Factor: Up to 280% of range while maintaining specification
• Sampling: 2 MS/s, 16-bit resolution
Input Ranges
• Voltage: 1.5 V to 1000 V (12 ranges), DC to 1 MHz
• Current (direct): 10 mA to 5 A (9 ranges) or 1 A to 50 A (6 ranges)
• Input Channels: Up to 6 simultaneous
• Frequency Bandwidth: DC, 0.1 Hz to 1 MHz (voltage/current); 5 MHz typical at -3 dB
Harmonic Analysis
• Harmonic Order: Up to 500th order on 50/60 Hz fundamental
• Dual Simultaneous Harmonic Measurement: Independent analysis of two sources
• Total Harmonic Distortion (THD): Full computation and display
• Low-Frequency Capability: 0.1 Hz minimum for low motor speeds
Filtering & Conditioning
• Digital Filter: 100 Hz to 100 kHz configurable
• Analog Filters: 1 MHz and 300 kHz options
• Offset Correction: Individual null function per input channel
Power Supply
• Input: 100 V or 200 V, 48 Hz to 63 Hz
• Maximum Consumption: 150 VA (standard), 450 VA (with /PD or /PD2 option and printer)
– Key Features
• Voltage Fluctuation/Flicker Measurement per IEC 61000-3-2, JIS C61000-3-2, IEC 61000-3-3, IEC 61000-3-11, and IEC 61000-3-12 (optional)
• Optional mechanical parameter measurement: rotational speed, direction, torque, slip, electrical angle, and mechanical power
• Individual offset correction for each input channel
– Typical Applications
• Power supply testing and characterization
• Motor drive and inverter analysis
• Harmonic distortion assessment
• Energy efficiency evaluation
• Power quality compliance verification
– Compatibility & Integration
Direct voltage input supports 1.5 V to 1000 V. Current input accepts 10 mA to 50 A depending on range selection. Operates on standard 100 V or 200 V single-phase power, 48 Hz to 63 Hz.
