Maintenance and polarization of dissolved oxygen meter electrodes
The dissolved oxygen meter is a polarographic analysis instrument, specially designed for measuring ppb-level dissolved oxygen in boiler feed water and condensate water. It ensures stability and accuracy at (ultra) low concentrations, and greatly improves measurement performance and usage environment.
Maintenance of dissolved oxygen meter electrodes:
(1) The dissolved oxygen meter electrode should be cleaned once every 1 to 2 weeks. If there are contaminants on the diaphragm, it will cause measurement errors. Be careful not to damage the diaphragm when cleaning. Rinse the dissolved oxygen meter electrode in clean water. If the dirt cannot be washed away, wipe it carefully with a soft cloth or cotton cloth.
(2) The zero point and range of the dissolved oxygen meter electrode should be recalibrated every February to March.
(3) The dissolved oxygen meter electrode is regenerated approximately once a year. When the measurement range cannot be adjusted, the dissolved oxygen electrode needs to be regenerated. Electrode regeneration includes replacing the internal electrolyte, replacing the diaphragm, and cleaning the silver electrode. If oxidation is observed on the silver electrode, polish it with fine sandpaper.
(4) If leakage of the dissolved oxygen meter electrode is found during use, the electrolyte must be replaced.
Referring to what has been said above, when you buy a dissolved oxygen meter, it is not only important to use it correctly, but also to maintain it. Many customers have problems after buying it before using it. Most of them are technicians taking the electrodes. When using the film, I accidentally touched the film head and broke the film. This caused too many negotiations and repairs between the customer and the supplier. Therefore, if you can be formal and careful when using it, you will avoid many unnecessary Trouble.
Polarization of dissolved oxygen meter electrodes
When the instrument is in use or is continuously powered off for more than 5 to 10 minutes, polarization occurs after the instrument is connected and powered on. In order to balance the chemical system in the electrode, reduce the zero oxygen current and stabilize the electrode. At the beginning, the current of the electrode is relatively large, decreases exponentially, and reaches a stable state after 6 hours. During this period, the displayed data will gradually decrease until stable. Calibration can then be performed.
The polarization process takes 6 hours. First, connect the electrodes to the secondary meter correctly and then turn on the power supply of the meter. If the power-off time is not long, the polarization time will be shorter and the stability will be faster.
Polarization of dissolved oxygen meter electrode:
When the instrument is in use or is continuously powered off for more than 5 to 10 minutes, polarization occurs after the instrument is connected and powered on. In order to balance the chemical system in the electrode, reduce the zero oxygen current and stabilize the electrode. At the beginning, the current of the electrode is relatively large, decreases exponentially, and reaches a stable state after 6 hours. During this period, the displayed data will gradually decrease until stable. Calibration can then be performed.
The polarization process takes 6 hours. First, connect the electrodes to the secondary meter correctly and then turn on the power supply of the meter. If the power-off time is not long, the polarization time will be shorter and the stability will be faster.\
