
Handheld Energy Meter Field Calibrator, Three Phase Electric Energy Quality Analyzer. Online Real Load Detection: Tests comprehensive metering error without power failure or circuit changes. Auto-Ranging Voltage: Covers 0-400V with auto-ranging options for 57.7V, 100V, 220V, and 400V. Vector Diagram Display: Visualizes voltage and current vectors to verify correct metering equipment connections. Optional HV Clamp: Detects current transformer ratios up to 500A for 35kV and below voltage levels. Remote Control Capability: Optional WIFI/Bluetooth module allows remote control via Android or Windows apps. Multi-Connection Judgment: Automatically identifies 48 connection modes for three-phase three-wire systems. Power Quality Analysis: Analyzes frequency deviation, voltage fluctuation, harmonics, and three-phase unbalance.