Working condition 1. The ambient air temperature of -5℃ to +40℃, 24-hour average does not excead +35℃; 2. Installation site altitude does not exceed 2000m; 3. The atmospheric relative humidity in the ambient air temperature is +40℃ less than 50%, at a lower temperature cam have a higher relative humidity, the wet months,the average maximum humidity of 90%, while the monthly average minimum monthly temperature to +25℃, and taking into account changes in temperature o...