Normal service conditions

■ Ambient air temperature:  Maximum air temperature: +40℃, Minimum air temperature: -15℃ (Under a special process, up to -45 ℃);

■ Altitude: ≤ 1000m;

■ Humidity:Daily average value of relative humidity: ≤95%

                   Monthly average value of relative humidity: ≤90%

■ Earthquake grade less than Degree 8

■ The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt.

■ No serious contamination and severe vibration recurrent, severe degree designed to meet the harsh conditions of Class 1 requirements; 

■ When used in excess of the normal environmental conditions specified in GB3906, negotiated by the user and the manufacturer. 

Note:① relative humidity greater than 70% should be turned on the electric heater. 

   ② Where 1000m altitude over the place, according to JB/Z102-71 regulations.