The ME440 is a professional-grade, portable three-phase data logger and power analyzer engineered for precision electrical measurement and power quality diagnostics. It delivers lab-grade accuracy, comprehensive harmonic analysis, and flexible data logging in a rugged, handheld device for field and industrial applications.

Key Technical Features:

1. High-Accuracy Measurement Compliance

   • Class 0.5s accuracy for active energy (IEC 62053-22)

   • Class 0.5 accuracy for active/apparent power

   • 0.2% voltage accuracy (5–600V), 0.01% frequency accuracy (45–65Hz)

   • Measures true RMS values for voltage, current, power, power factor, and unbalance

2. Advanced Harmonic Analysis

   • Analyzes individual harmonics up to the 51st order

   • Calculates THD (Total Harmonic Distortion) and HD (Harmonic Distortion)

   • Configurable display of up to 5 simultaneous harmonic orders (2–51)

3. Versatile Sensor & Input Compatibility

   • Four BNC terminals support Rogowski coils (up to 6kA), 333mV CTs, and 320mV current clamps

   • Programmable CT/VT ratios with configurable primary/secondary scaling

   • Direct voltage input or voltage transformer (VT) connection

4. Robust Data Logging & Storage

   • 30GB internal memory for CSV data recording

   • Configurable logging intervals: 1 second to 9999 seconds

   • Captures all electrical parameters, harmonics, min/max, and demand values

   • Sliding-block and fixed-interval demand calculation (1–60 minutes)

5. Industrial Connectivity & Durability

   • MODBUS-TCP communication via RJ45 port (default IP: 192.168.1.5)

   • Operates from -25°C to +55°C, IP20 rated, Overvoltage Category III

   • Dual power: 2×18650 batteries (10 hours) or 5V DC supply

   • 3.5-inch TFT display with contextual menu navigation