The correct use of conductivity meter and electrodes

A: In order to ensure the accuracy of the conductivity meter, if necessary, use the conductivity meter to recalibrate the electrode constant before using the conductivity meter. At the same time, conductivity constants should be calibrated periodically. If there is a large error, the electrodes should be replaced in time.

Two: In the measurement of high-purity water should avoid contamination, the correct choice of constant conductivity electrode and the best use of sealed, flow measurement. Otherwise, its conductivity will increase rapidly. This is because after the carbon dioxide in the air dissolves into the high-purity water, it becomes a carbonate ion with conductive properties and affects the measurement value.

Three: In order to ensure the measurement accuracy, the electrode should be washed twice with deionized water (or distilled water) with a volume of 0.5μS/cm before use, and then it can be measured after flushing with the sample to be tested.

Four: The electrode plug seat prevents moisture, so as to avoid unnecessary measurement errors.

Five: The value displayed after the conductivity meter measurement has been converted to the conductance value of 25°C. If there is no need to compensate, pull out the temperature electrode instrument to display 25 °C, the measured value is the conductance value of the solution at that time.