... electronic or mechanical meter can be tested, directly measure voltage, current, frequency, phase, power factor at work site3 ... with completely computer management system4) Automatic voltage and current range selection5) Measure low voltage and current transformer (CT) ratio ... temperatureTechnical index: 1) Accuracy class: 0.05, 0.12) Voltage range: 60V, 100V, 200V, 400V3) Current: direct measure: 1A ...