1.Measurement principle and composition

Working principle of electrolytic trace water analyzer:The tested gas enters the electrolytic cell of the analyzer, and its moisture is absorbed by the moisture absorbing agent(Phosphorus pentoxide coating layer)Absorbed and electrolyzed into hydrogen and oxygen, while phosphorus pentoxide is regenerated. When the absorption and electrolysis reach equilibrium, all the water entering the electrolytic cell is absorbed by the pentoxide coating layer and completely electrolyzed. According to Faraday's law of electrolysis and gas law, it can be deduced that there is a logarithmic relationship between the electrolysis current of water and the water content of gas. Therefore, the water content of gas can be measured by measuring the electrolysis cell current through a detection circuit.
2. Daily maintenance
(1)Before putting into operation, the electrolytic trace water analyzer must be purged with dry gas to prevent gases with high water content from entering the electrolytic cell and contaminating it, causing inaccurate measurements and affecting the normal use of the instrument.usi-1}rbWhen the micro water analyzer is put into operation for the first time or restarted after a long-term shutdown, due to the high humidity of the electrolytic cell, it must be dried before measurement to keep the electrolytic cell in a dry state. The length of drying time is related to the humidity level of the electrolytic cell, room temperature, and type of gas sample. Drying and blowing of electrolytic cells generally require24~ 72Hours, summer requires even longer time. But once the electrolytic cell is dried, it can be quickly measured.

(2)The sealing of the gas system of the electrolytic trace water analyzer must be good to prevent moisture leakage from the external environment.

(3)The sample gas is directly discharged into the atmosphere after passing through the analyzer measurement room. Considering that moisture in the atmosphere will diffuse into the measurement system, a suitable length of pipe can be connected to the exhaust port, with the principle of not affecting the pressure of the measurement chamber in terms of length and diameter.

(4)The sampling pipeline should be as short as possible, minimizing the number of joints and avoiding the generation of "dead space". Welding should be used at the pipeline connection instead of sleeve connection to reduce the interference of background moisture.

(5)The sampling pipeline and measuring chamber walls should strive for cleanliness and good smoothness. Stainless steel or copper pipes are generally used for the sampling tubes of analytical instruments on air separation equipment.