1. Ambient air temperature: -5oC~+40oC, the highest monthly mean temperature should not exceed +30oC; 2. Altitude for installing place should not exceed 1000m; 3. When the ambient air temperature is +40, the relative humidity should not exceed 50%, and it allows higher relative humidity under lower temperatures. Max's average humidity in the dampest month is 90%, meanwhile, the lowest average temperature of this month is +25oC, and condensation on the product surface caused by temperature change should be taken into consideration.
