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Experimental evaluation of dynamic properties of the four electrode reference conductivity cells

Mikhal A. A., Warsza Z. L., Gavrylkin V. G.

Measurement Automation Monitoring

2015

Vol. 61, No. 10

456--459

Dynamic properties of the four-electrode cell with conducting liquid inside are described in the paper. The cell is used as a sensor of the electrolytic conductivity (EC) in the national Ukrainian standard. Electrical model and physical model for the temperature changes of this sensor are presented. To avoid additional measurement errors the stable state in desired temperature should be obtain. To obtain values of parameters describing the dynamic process of EC cell for temperature changes the experimental way was chosen. Installation and measurement procedure is presented. It is found that temperature transition process in the EC cell can be modeled by the first order differential equation and depends mainly on two cell tubes. For establishing the cell temperature within an error less then 0.002ºC time 36 min is needed.