Industrial applications of dissolved oxygen meters
The dissolved oxygen meter is used to continuously monitor the dissolved oxygen value in solutions such as chemical fertilizers, metallurgy, environmental protection, pharmaceuticals, biochemistry, food and sewage treatment, municipal sewage engineering, etc. The microcomputer in the meter can store, calculate and compensate for the measured dissolved oxygen value. All parameters can be set for related data, such as altitude, salinity, etc. Not only that, this instrument also has the characteristics of full functions, stable performance, and easy operation. It is an ideal instrument for dissolved oxygen testing and control. In addition, the background light of the dissolved oxygen meter also uses LCD display, with error indication and automatic temperature compensation functions. Isolated 4-20mA current output, dual sets of relay control, high and low point alarm indication, power-down memory, no backup battery required, data can be saved, these properties are very suitable for use in industrial practice.
The application industries of dissolved oxygen meters span a wide range, because 70% of the earth is water, and most of the substances in the human body are also water. It can be seen how important water is in the human life process and living environment, and ensuring that water resources are used in daily life Drinkability is also extremely important in life.
Therefore, dissolved oxygen meters have now been applied in many fields. When the staff tested the water source, the top film of the dissolved oxygen meter sensor was covered with a layer of fluorescent dye. When a beam of short-wavelength light irradiated the fluorescent dye, the fluorescent dye would emit long-wavelength light when it returned to the ground state from the stress state. The red light is the test signal. The concentration of dissolved oxygen can be known by testing the duration of the red light. The higher the concentration of dissolved oxygen, the shorter the duration of the red light.
Use and maintenance of dissolved oxygen meter electrodes
When measuring, the electrode should be cleaned first in distilled water (or deionized water) and dried with filter paper to prevent impurities from being brought into the liquid being measured. 1/3 of the electrode should be inserted into the solution being measured. When the electrode is not in use, it should be washed and inserted into a protective sleeve with 3.5 mol of potassium chloride solution, or the electrode should be inserted into a container with 3.5 mol of potassium chloride solution.
Check whether the terminal block is dry. If there is any stain, please wipe it with absolute alcohol and blow dry before use.
Long-term immersion in distilled water or protein solutions should be avoided, and contact with silicone grease should be avoided.
If the electrode has been used for a long time, its glass film may become translucent or have sediments attached. In this case, it can be washed with dilute hydrochloric acid and rinsed with water.
The electrode has been used for a long time and when measurement errors occur, it must be calibrated with the instrument. Make corrections.
When the Hetai dissolved oxygen meter electrode is maintained and maintained in the above manner and still cannot be calibrated and measured, it means that the electrode has failed. Please replace the electrode.、
