A Source Measurement Unit (SMU) is a precision instrument designed to both source and measure electrical parameters such as voltage, current, and power. It enables real-time monitoring and recording of power-related data, which is essential for evaluating power performance, diagnosing faults, and optimizing system efficiency.

1. Voltage and Current Measurement：Accurately measures both DC and AC voltage and current from power sources and devices under test.​
2. Power Calculation：Calculates power consumption metrics, including active power, reactive power, and apparent power.​
3. Energy Monitoring：Accumulates energy usage over time, supporting energy efficiency analysis and cost management.​
4. Data Logging：Continuously records and stores measurement data for detailed post-test analysis and diagnostics.​
5. Communication Interfaces：Supports integration with external systems via common protocols such as Modbus, RS485, and Ethernet, enabling seamless connectivity in automated test environments.