(1) The altitude does not exceed 2000 meters;
(2) The temperature of the surrounding medium is not higher than +40℃ and not lower than -10℃;
(3) The relative humidity of the air is not more than 85% (when the medium temperature is 20℃±5℃);
(4) Places without conductive dust;
(5) An environment without explosion hazard;
(6) An environment that does not contain gases and vapors that can corrode metals and insulation;
(7) In a place where there is no rain or snow;
(8) In a place where the vertical plane is not inclined more than 5 degrees and there is no severe vibration and impact.