... energy. The meter is for indoor use,and the temperature should be -10°C to +50°C;relative humidity should be not more than 85 ... %(temperature is 25°C);at the same time,pls confirm ... the meter\ DTS480 3(6)A,5(20)A,10(40)A,15(60)A,20(80)A,30(100)A2 ... more than 1 circle3.more pic: Three phase electronic type Power Meter with LCD display DTS480