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

• Autorzy: Mikhal A. A. , Warsza Z. L. , Gavrylkin V. G.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

primary conductivity standard; cell dynamics; uncertainty

• Wydawca: Wydawnictwo PAK
• Czasopismo: Measurement Automation Monitoring
• Rocznik: 2015
• Tom: Vol. 61, No. 10
• Strony: 456--459
• Opis fizyczny: Bibliogr. 8 poz., fot., rys., wykr., wzory

Twórcy

autor

Mikhal A. A.

• Institute of Electrodynamics, National Academy of Science of Ukraine (NANU), 56 Peremogy Ave., 03680 Kyiv-57

autor

Warsza Z. L.

• Industrial Research Institute of Automation and Measurements, PIAP, 202 Jerozolimskie Ave., 02-486 Warszawa PL

autor

Gavrylkin V. G.

• UKRMETRTESTSTANDARD, 4 Metrologichna St., 03143 Kiev, Ukraine

Bibliografia

• [1] ISO 31-8: 1992. Quantities and units - Part 8: Physical chemistry and molecular physics.
• [2] Shreiner R. H., Pratt K. W.: Standard Reference Materials: Primary Standards and Standard Reference Materials for Electrolytic Conductivity. NIST Special Publication, Ed. 2004 pp. 260 -142.
• [3] Maґriaґssy M., Pratt K. W., Spitzer P.: Major applications of electro-chemical techniques at National Metrology Institutes. Metrologia, Vol. 46, 2009, pp. 199 -213.
• [4] Brinkmann F., Ebbe Dam N., Deák E., Durbiano F., Ferrara E., Fükö J., Jensen H. D., Máriássy M., Shreiner R. H., Spitzer P., Sudmeier U., Surdu M., Vyskocil L.: General paper: Primary methods for the measurement of electrolytic conductivity, Accred Qual Assur., 2003, 8, pp. 346 -353, DOI 10.1007/ s00769-003-0645-5.
• [5] Mikhal A. A., Warsza Z. L., Gavrylkin V. G.: Primary electrolytic conductivity standard of upgraded accuracy. Proceedings of International Conference Mechatronics, 2015, Warsaw (in print).
• [6] Mikhal A. A., Warsza Z. L.: Impact of AC electric field non-uniformity on impedance of the conductivity cell. Proccedings of XXI IMEKO World Congress “Measurement in Research and Industry” Aug. 30 - Sept. 4, 2015, Prague, Czech Republic.
• [7] Gavrylkin V. G., Glukhenkiy A. I., Mikhal A. A.: An analysis of the error when determining the constant of the primary standard conductometric cell. Measurement Techniques. Vol. 56, Issue 8, Nov. 2013, pp. 935–941.
• [8] Mikhal A. A., Warsza Z. L.: Geometric part of uncertainties in the calculation constant of the primary four electrode conductivity cell. ACTA IMEKO, Vol 4, no. 2, June 2015, pp.18-22.