Abstract
Oxygen is a necessity of life that is very rarely owned even though it has a very high value for humans. Our respiratory system directly takes oxygen intake from the surrounding air either or not consciously. Oxygen therapy is a method of administering oxygen at a higher concentration than ambient oxygen, with the treatment or prevention of symptoms and the appearance of hypoxia. The oxygen concentration to be administered to a person is determined by the flow titration required for sufficient SPO2. The accuracy of the oxygen flow delivery system to the patient is very high, so it is necessary to calibrate to determine the correctness of the indication of measuring instruments and measuring instruments stated. This study uses an Arduino microcontroller to process the oxygen concentration output from the OOA101-1 oxygen concentration sensor, then the processed oxygen concentration will be displayed on the TFT LCD. The variable in this study is the oxygen concentration setting value, while the independent variable is the OOA101-1 oxygen concentration sensor. The concentration value is set using an oxygen blender, while the comparison tool used is a gas flow analysis (Citrex H3). At the testing stage, the measurement value is 50% to 100% with a time of 1 minute at each point. Based on the measurements that have been made, the largest error value is obtained at a concentration of 50%, which is 3.07% and the smallest error value is at 100%, which is 0.40%. Data retrieval using a compressor and central oxygen is very influential on the results of the flow and oxygen concentration. The results obtained are more stable than without the use of a compressor and central oxygen.From these results, the calibrator module has an error (value) that is still within the relative limits of the conclusion, which is ±5%. And also the design of this tool is portable and low cost and made for use in hospital establishments as maintenance of HFNC equipment.
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