... for option CONDITIONS1) Environment:away from rain, sun, high temperature, dust, alkali, acid, strongvibration situation or strong electromagnetic ... 106KPa3) Relative humidity: 10% - 90%4) Noise: <60dB5) Temperature: -10°C - 40°C Technology standards:1) Timing accuracy: <1 ... ≤0.5dB NOTICE1) Meter should work in ventilated and clean surrounding. Be away from rain, sun,high temperature, dust, alkali, ...