Autor: Mikhal, A. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of AC field distribution on impedance of the conductivity cell
Autorzy:: Mikhal, A. A.
Warsza, Z. L.
Powiązania:: https://bibliotekanauki.pl/articles/114302.pdf
Data publikacji:: 2015
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: measurement
electrolytic conductivity
electrical field
error
Opis:: The АС impedance model of a liquid conductivity has been developed to assess the influence of electromagnetic vector potential. It has been proved that the field in a liquid conductor is quasi-static. Approximation error, even taken for very concentrated solutions (e.g. sea water), does not exceed 0.01 ppm. The calculation of resistance of the four-electrode cell is given with the account of Ampere's circuit law. Two types of errors are defined: DC error due to finite thickness of electrodes, and AC error due to presence of displacement currents when using an impedance model.
Źródło:: Measurement Automation Monitoring; 2015, 61, 11; 521-525
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Experimental evaluation of dynamic properties of the four electrode reference conductivity cells
Autorzy:: Mikhal, A. A.
Warsza, Z. L.
Gavrylkin, V. G.
Powiązania:: https://bibliotekanauki.pl/articles/114164.pdf
Data publikacji:: 2015
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: primary conductivity standard
cell dynamics
uncertainty
Opis:: 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.
Źródło:: Measurement Automation Monitoring; 2015, 61, 10; 456-459
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja