How to determine the conductivity electrode constant Why calibrate the constant

1. According to the formula J = K / G, the electrode constant J can be obtained by measuring the conductivity G of the conductivity electrode in a KCl solution of a certain concentration. At this time, the conductivity K of the KCl solution is known. When measuring, the constant knob of the conductivity meter should be turned to 1.0cm-1. Because the concentration and temperature of the measurement solution are different, and the accuracy and frequency of the measurement instrument are also different, the constant J of the conductivity electrode sometimes has a large error. After a period of use, the electrode constant may also change. Therefore, the newly purchased conductivity electrode, and the conductivity electrode after a period of use, the electrode constant should be re-measured and calibrated. The following points should be paid attention to when measuring the conductivity constant:

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