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How to Calibrate the Dissolved Oxygen Analyzer?

Dissolved oxygen analyzer is an instrument that mainly detects oxygen content in solution. It consists of transmitter and electrode. Through electrode measurement, the data is fed back to the transmitter in real time. The instrument has a self-diagnosis function and high data reliability; the waterproof structure and enhanced electrode lineup allow you to freely match and use it indoors and outdoors; simply connect to a computer, quickly transmit measurement data and save the data in a table.

The calibration method of the dissolved oxygen analyzer is the air calibration technique. That is, the electrode of the dissolved oxygen meter is placed in an air environment saturated with water at a certain temperature, and after equilibrium, the corresponding saturated dissolved oxygen value at that temperature is used as the reference standard value for calibration. Now based on the three characteristics of the dissolved oxygen meter measurement basis, it is not difficult to explain the calibration process of the dissolved oxygen meter: at a certain temperature (Henry coefficient does not change), the oxygen partial pressure in air-saturated water and water-saturated air is the same, and because the physical quantity directly measured by the dissolved oxygen meter electrode is the oxygen partial pressure, the dissolved oxygen concentration displayed by the conversion is also the same。

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