| 摘要 |
FIELD: physico-chemical investigation in chemical and allied industries. SUBSTANCE: method of control of concentration of electrolyte located in cell connected in circuit of frequency generator consists in measurement of frequency in equal time intervals, control of resonance frequency and calculation of electrolyte parameters by frequency. Investigation is carried out in unstable temperature field. Additionally carried out are control on a cell with rated characteristics in same temperature field, control of generator frequency, registration of measurement error of frequency, which is used for determination of resonance frequency of electrolyte solution corresponding to extreme error of frequency measurement by which sought electrolyte concentration is determined. F-meter-conductivity apparatus additionally has channel switch whose input and output are connected, respectively, with output and input of code-frequency converter and frequency-code converter. The second and third outputs of channel switch are connected via reference and working conducometric cells to its inputs. Address and control inputs of channel switch are combined with respective inputs of code-frequency and frequency-code converters and with outputs of computer. Channel switch information inputs connect, via busbar, the outputs of frequency-code converter and inputs-outputs of other unit. F-meter-conductivity apparatus also has pulse generator, electronic gate, computer, multiplexor, successive connection of registers, digital-analog converter, varicap inserted in generator circuit. EFFECT: higher accuracy of control of electrolyte concentration under conditions other than normal. |
