Check Motors and Compressors, Check for Energized Circuits & Loads, Ideal for Electrical Energy Audit of Heating, Ventilation & Aircom Systems (HVAC, To Identify Low Voltage Control Signal, To Identify Power Sources, 1Φ 3 Φ (3p3w 3p4w) Power Calculations, Evaluate Electrical Contacts, Verify the Stability of Voltage