Yokogawa 2531 - Power Meters

The Yokogawa 2531 is a digital power meter engineered for precise electrical signal measurement across DC and AC frequencies. It employs a 16-bit A/D converter with a 32-bit high-speed computation DSP to deliver power accuracy of ±0.04% of reading plus ±0.04% of range. The instrument samples 36 data items per 250 ms, enabling real-time power analysis and efficiency characterization in industrial test and calibration environments.

Technical Specifications

• Power Accuracy: ±0.04% of reading + ±0.04% of range


• Bandwidth: DC, 2 Hz to 500 kHz


• Direct Input: Maximum 30 A, 600 V


• A/D Conversion: 16-bit digital sampling technology


• Signal Processing: 32-bit high-speed computation DSP


• Control Architecture: 8-bit ARM Cortex-M3 processor


• Measurement Rate: 36 data items per 250 ms


• Noise and Common-Mode Voltage Rejection: Excellent

Key Features

• High-resolution digital sampling architecture minimizes measurement error in both voltage and current channels


• Wideband operation from DC through 500 kHz supports analysis of PWM-modulated and harmonic-rich signals


• Direct measurement capability to 30 A and 600 V eliminates external transducer dependency


• Fast computation throughput enables transient capture and dynamic efficiency profiling


• Superior common-mode and noise rejection ensures signal integrity in noisy industrial settings

Typical Applications

• PWM inverter efficiency characterization


• Power factor and harmonic analysis across industrial frequencies


• Electrical signal monitoring in wide frequency ranges


• Precision calibration and validation testing

Compatibility & Integration The 2531 integrates local control and data storage via its ARM Cortex-M3 processor, supporting standalone operation or integration into larger test benches. Its direct input architecture and wideband response make it suitable for measurement chains requiring high accuracy without intermediate conditioning stages.