... measurementPrecisionThe range of 600 VResolution 0.1 V50 Hz to 400 Hz ± (% reading + Digital) ± (2% + 3)Input impedance3 M Ω ( ... C, 18 ° C temperature < or > 28 ° C (64 ° F < or > 82 ° F).Relative humidityFrom 0% to 95%, from 10 ° C to ... 30 ° C (50 ° F to 86 ° F).From 0% to 75%, from 30 ° C to 40 ... from 40 ° C to 55 ° C (104 ° F to 131 ° F)Vibration resistance:Randomly, 2 g, 5-500 Hz, with ...