Specifications
Parameter Specification
Model Yokogawa WT1804E
Input Elements 4 fully isolated elements
Power Accuracy ±0.05% of reading (45-66 Hz, specific conditions)
Voltage Range 1.5 V to 1000 V (extendable to 2000 V with optional sensor)
Current Range Direct input: 10 mA to 50 A (5 A and 50 A ranges)
External sensor: Comprehensive support available
Bandwidth DC, 0.1 Hz to 1 MHz (-3 dB)
Basic Accuracy ±0.05% reading + ±0.05% range (45-66 Hz)
Power Factor Range 0.0000 to 1.0000
Harmonic Measurement Simultaneous measurement up to 500th order
Integration Function High-precision energy measurement (Wh, Ah)
Data Update Rate 500 ms (2 readings/s) for all inputs
10 ms (100 readings/s) for selected inputs
Display 8.4-inch TFT color touchscreen (800 × 600 pixels)
Interfaces LAN, USB (Host & Device), Optional GPIB
Operating Temperature 0°C to +40°C
Dimensions (W×H×D) 434 × 177 × 520 mm
Weight Approx. 14 kg
Key Features
Four isolated channels for complex system measurements

High precision: ±0.05% power accuracy

Wide bandwidth: DC to 1 MHz for high-frequency applications

Low power factor capability: Accurate measurement down to 0.0001 PF

Advanced harmonic analysis: Simultaneous 500th order measurement

High-speed sampling: 10 ms update rate for transient analysis

Large touchscreen: Intuitive operation and clear visualization

Comprehensive interfaces: LAN, USB, optional GPIB

Advanced Capabilities
Simultaneous multi-point measurements with perfect synchronization

Three-phase power calculations (3V3A, 3V2A, 2V2A methods)

Summing function for total power calculation

Motor evaluation mode with torque calculation

Custom mathematical functions for advanced calculations

Data logging for long-term trend analysis

Typical Applications
Three-phase motor and drive system testing

Dual-inverter system evaluation

Power quality analysis in industrial facilities

Advanced research on multi-phase systems

Energy efficiency testing of complex electrical systems

Manufacturing quality control of multi-component systems