... V CAT2) Power measurement of 3-phase 3-wire, 3-phase 4-wire, single-phase mode 3) V, A, W, VA, VAR, KWh, PF ... consumption: 250 mW9) Storage temperature: - 20 °C ~ 70 °C 10) Operating temperature: 0 °C ~ 40 °C 11) Temperature Coefficient:0.05×(specified accuracy ... #) ambient temperature: 18°C ~ 28°C, Humidity 80%, frequency for voltage, current: 45 Hz ~ 65 Hz Three Phase Digital Power Clamp Meter