Field meter tester able to check 48 different wrong wiring connection for P3 ... , 100V, 200V, 400V3) Current: direct measure: 1A, 5A, clamp transformer 100A (200A, 500A, 1,000A) is optional4) Voltage, current and power ... , relative humidity: 30 - 80% MT3000D Portable field Energy Meter Multifunctional tester