Key points for daily maintenance of trace dissolved oxygen meter
Selection experience of trace dissolved oxygen analyzer In air separation equipment, trace oxygen analyzer is widely used. It can be used to measure process control parameters such as the purity of nitrogen in the upper and lower towers and the trace oxygen content in the argon in the refined argon tower. It can also measure the final product. Quality control parameters such as trace oxygen content in pipeline gas, liquid nitrogen and storage tank argon. The selection of the trace dissolved oxygen meter can be based on the different measurement principles of the trace dissolved oxygen meter, taking into account various factors such as production control quality requirements, economic costs, maintenance workload and repair costs.
Routine maintenance of trace dissolved oxygen meter. During routine maintenance of the instrument, you should pay attention to:
(1) Avoid sample gas with high oxygen content from entering the fuel cell. Excessive oxygen content in the sample gas will intensify the corrosion of the lead electrode. When the corrosion of the lead electrode is normal, you can prepare a nitric acid solution at a ratio of 1:4 and use diluent to clean the lead electrode. When there is severe corrosion, you can only replace the lead electrode and replace the electrolyte regularly.
(2) Keep the pressure and flow rate of the measurement sample gas constant.
(3) Regularly add distilled water to the container and adjust the humidifier to ensure the electrolyte level.
(4) For calibration gas, use 80% of the measuring range standard gas for range calibration to ensure measurement accuracy.
(5) The discharge pipeline of the trace dissolved oxygen meter must ensure smooth flow at normal pressure to prevent the vent pipe from being pressurized and blocked, which will affect the measurement accuracy of the instrument. Currently, the micro fuel cell type trace oxygen analyzer is the most widely used in air separation equipment. Its measurement principle is the same as that of the trace oxygen analyzer. However, the micro fuel cell is sealed. After two years of use, the sensor performance declines and the micro fuel cell needs to be replaced. The fuel cell.
Precautions for trace dissolved oxygen meter
(1) In normal measurement, every 100 ml of electrolyte can react with no less than 1 gram of water. If the measurement time is too long and the sensitivity of the reagent decreases, new reagents should be replaced.
(2) Do not touch the reagent with your hands. If it comes into contact with the skin, the trace dissolved oxygen meter should be rinsed thoroughly with water. Good ventilation facilities should be used when updating the reagent.
(3) Storage of reagents; they must be protected from light and the storage temperature should be below 8 degrees.
