... 3p3w2) Single or three phase active / reactive electronic or mechanical meter can be tested, directly measure voltage, 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