Field meter tester able to check 48 different wrong wiring connection for P3 Field meter testerMain features: 1) Large color LCD, friendly user' ... current, frequency, phase, power factor at work site3) Energy meter data memory: >4,000 meters with completely computer management system4 ... : temperature: -25 - +55°C, relative humidity: 30 - 80% MT3000D Portable field Energy Meter Multifunctional tester