| 摘要 |
means measuring chemical composition of substances, control over disinfection of drinkable water at water-treatment plants. SUBSTANCE: analyzer has potentiometric cell 1, measuring amplifier 2, programming device 3, processor 4 of measurement results. Inputs I and II of measuring amplifier 2 are correspondingly connected to first 5 and second 6 electrodes of potentiometric cell 1 and its output is connected to input I of processor 4 of measurement results. Vessel 7 with base electrolyte is connected via metering pump 8 to potentiometric cell 1. Current generator 9 is connected to input of first switch 10. Potentiometric cell 1 also houses third 11 and fourth 12 electrodes, inlet valve 13 and mixer 14. Temperature-sensitive element 15 located jointly with potentiometric cell 1 inside flow chamber 16 is connected to input III of measuring amplifier 2. Third electrode 11 of potentiometric cell 1 is connected to output I of second switch 17 and to output II of third switch 18. Fourth electrode 12 of potentiometric cell 1 is connected to output II of second switch 17 and to output I of third switch 18. Outputs I and II of programming device 3 are connected correspondingly to inlet valve 13 and mixer 14 of potentiometric cell 1, output III is connected to controlling input of metering pump 8, output IV is connected to controlling input of first switch 10, output VII is connected to controlling inputs of second 17 and third 18 switches, outputs V, VI, VIII and IX are correspondingly connected to inputs II, III, IV and V of processor 4 of measurement results. EFFECT: simplified maintenance of analyzer with simultaneous increase of authenticity of results of measurement of mass concentration of residual active chlorine. 1 dwg |
