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Requirements for the gas circuit of the sulfur and nitrogen analyzer: Dry and clean polytetrafluoroethylene tubes, copper tubes, or stainless steel tubes should be used for gas circuit connections. Before use, new tubes must be thoroughly cleaned with methanol or propane, as well as other solvents capable of dissolving oil-based contaminants, and then dried to ensure that the high-purity gas is not contaminated. Connections between gas lines should use cleaned two-way or three-way valves, to ensure that each gas line remains free from contamination or leaks. Gas cylinders must be equipped with two-stage pressure regulators. High-purity gases must be decompressed to pressure before they can be fed into the instrument’s gas circuit system. Requirements for dust and corrosive gases in sulfur and nitrogen analyzers: The instrument should be kept away from areas with dust and corrosive gases. Because corrosive gases can reduce electrical performance, affecting the proper operation of the cooler. Dust can affect the operation of the fan, causing the temperature outside the pyrolyzer to rise and affecting the stability of the instrument ； At the same time, dust can also adhere to the surface of the reaction chamber, resulting in a decrease in the luminous intensity and thus affecting the sensitivity of the instrument. Requirements for the indoor space of a sulfur and nitrogen analyzer: The indoor work surface must be stable enough to allow the entire set of instruments to be arranged in order, with the surface capable of bearing their weight. Environmental requirements for using a sulfur and nitrogen analyzer: The temperature and lighting conditions for such an analyzer require that the room temperature remain between 10°C and 30°C, with relative stability; the instrument should also be protected from direct light. Note: To ensure the proper and stable operation of the analysis system, it is recommended to use an air-conditioned room. Ventilation and flammability requirements for sulfur and nitrogen analyzers: It is necessary to maintain good air circulation inside the room, and the presence of any flammable gases is strictly prohibited.