Product description: Three Phase Energy Meter Field Calibrator is a precision AC energy meter testing instrument, mainly used to test three phase energy meter error on site and measure various of AC parameters. Technical index: Electrical parameters Accuracy class 0.05%, 0.1% Resolution 6 TFT (640-480) Electrical parameters - continued Power supply 220V±10%, 50/60Hz Li-polymer battery (size (mm): 110x51x16, nominal output voltage: 7.2V, capacity: 5000mAh) Power line supply (U1, UN), 85V-265V 50/60Hz Communication port RS232 Test voltage Range 5-480V Error ±0.05% (30V-480V) ±0.1% (5V-30V) Harmonic 2nd-63st Test current Range (direct connection) 5mA-20A Error (direct connection) ±0.05% (100mA-20A) ±0.1% (10mA-100mA) Range (clamp CT) 10mA-3000A Error (camp CT) �±0.2% (100mA-100A) ±0.5% (100A-3000A) Harmonic 2nd-63st