Seeking help with a Polymetron conductivity meter malfunction
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A Polymetron9125 conductivity meter was installed on-site, and it kept reporting an error: “POLARIZATION TOO HIGH”. I consulted the manufacturer’s technical staff, who said that the electrode range had been set too low. However, the manual states that there is \"excessive electrode polarization\" – what exactly is the cause of this error? ?
The measured conductivity exceeds the range that the conductivity probe can measure. Did the user specify the maximum range to the manufacturer when placing the order? If it is reported, it is the manufacturer’s responsibility to provide a free replacement probe. If no range is specified, negotiate with the manufacturer to replace it or purchase a suitable probe.
I see, thank you. May I ask again, how many methods are there for on-site calibration of conductivity performance? Which is more suitable, the one-point method or the two-point method?
Either one will do; as long as it is a standard conductivity solution, there is no problem.
In addition to that, the conductivity of a solution is also related to the properties of the electrolyte, its concentration, and the temperature of the solution; try it several times to see
For electrodes with unknown electrode constants, or when it is necessary to correct the cell constant, this electrode can be used to measure the conductivity of potassium chloride solutions with known conductivity (at a temperature of 25 ± 5°C). The cell constant of the electrode can then be calculated based on these measurement results. To reduce errors, it is advisable to use a potassium chloride standard solution whose conductivity is similar to that of the water sample being tested for calibration. The cell constant of the electrode is calculated using the following formula: K = S1/S2, where K is the cell constant of the electrode in CM⁻¹; S1 is the conductivity of the potassium chloride standard solution in US/CM; and S2 is the conductivity of the potassium chloride standard solution measured using the electrode with the unknown cell constant
Thank you, I will have more questions to ask everyone in the future...