... 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) Automatic voltage and current range selection5) Measure low voltage and current transformer ... 60V, 100V, 200V, 400V3) Current: direct measure: 1A, 5A, clamp transformer 100A (200A, 500A, 1,000A ...