METHOD OF CONTROL OF ELECTROLYTES AND OF CONDUCTIVITY METER FOR ITS REALIZATION Russian patent published in 1998 - IPC

FIELD: chemical and other industries. SUBSTANCE: method of control of electrolyte located in cell placed into circuit of frequency generator consists in measurement of frequency after equal time intervals, in check of resonance frequency and in calculation of parameters of electrolyte frequency. Examinations are performed in unstabilized temperature field and additional control across cell with normed characteristics is carried out in same temperature field. Frequency of generator is controlled, errors of frequency measurement caused by instability of temperature field are recorded. Resonance frequency corresponding to frequency of electrolyte solution is found and is used to determine sougth-for concentration. F conductivity meter for realization of method includes working and exemplary conductometric cells, code-to-frequency and frequency-to-code converters which information outputs are connected through bus to corresponding inputs of code-to-frequency converter, on-line storage and computer which information inputs-outputs are connected by corresponding bus. F conductivity meter is provided with channel commutator which input and output are connected correspondingly to output and input of code-to-frequency converter and frequency-to-code converter. Second and third outputs of channel commutator are connected through exemplary and working conductometric cells to its inputs. Address and controlling inputs of channel commutator are tied up together with proper inputs of code-to-frequency and frequency-to-code converters and through on-line storage to outputs of computer. Information inputs of channel commutator are coupled through bus to outputs of frequency-to-code converter and to inputs-outputs of on-line storage. EFFECT: expanded application field, improved operational characteristics. 4 cl, 5 dwg