FIELD: analytic chemistry. SUBSTANCE: device has three-electrode electrochemical cell which has operation electrode, additional electrode and comparison electrode, and unit which controls rotation of operation electrode. Both three-electrode electrochemical cell and control unit are designed as integral electrochemical detector. In addition device has potentiometer, analog adder, digital-to-analog converter of linear-varying voltage, digital-to-analog converter of alternating voltage, input circuit breaker, input converter-amplifier, sweeping mode selection unit, memory unit, analog-to-digital converter and microprocessor unit which has control unit for input devices, synchronous detector unit, digital filter unit, accumulation buffer unit, text-mode display control unit, indication unit, peripheral devices communication unit, which has assembly of serial data transmission port, assembly of parallel data transmission port. In addition device has read-only memory unit, which has master oscillator with linear-varying voltage, master oscillator with alternating voltage, unit for alternation of sweeping characteristics, setting timer, operation mode selection unit and digital processing unit, which one input is connected to corresponding output of operation mode selection unit. Second input of digital processing unit is connected to output of accumulation buffer unit. Second input of accumulation buffer unit is connected to one output of analog-to-digital converter, which another output is connected to one input of digital filter unit through synchronous detector unit. Another input of digital filter unit is connected to one output of operation mode selection unit. Second input of synchronous detector unit is connected to second output of operation mode selection unit, which third output is connected through setting timer to corresponding inputs of master oscillator of linear-varying voltage and master oscillator of alternating voltage. Second inputs of said oscillators are connected to corresponding outputs of unit for alternation of sweeping characteristics. Input of latter unit is connected to input of operation mode selection unit and to output of text-mode display control unit. Fourth output of operation mode selection unit is connected to one input of indication unit, which another input is connected to third output of setting timer, which fourth output is connected to input of peripheral devices control unit. Fifth output of setting timer is connected to third input of synchronous detector unit. One output of digital processing unit is connected to text-mode display unit. Second and third outputs of digital processing unit are connected respectively to assembly of serial data transmission port and to assembly of parallel data transmission port. Output of peripheral devices control unit is connected to corresponding inputs of serial circuit of analog-to- digital converter, memory unit, sweeping mode selection unit, input converter-amplifier, and input circuit breaker. Output of peripheral device control unit is also connected to one input of unit which controls rotation of operation electrode. Said input is also connected to corresponding input of input circuit breaker and operation electrode. Additional electrode and comparison electrode are connected to corresponding inputs of potentiometer which is connected in series analog adder, which first and second inputs are connected respectively to outputs of digital-to-analog converter of linear-varying voltage and digital-to-analog converter of alternating voltage. First inputs of digital-to-analog converter of linear-varying voltage and digital-to-analog converter of alternating voltage are joined and connected to output of master oscillator of linear-varying voltage. Their second inputs are joined and connected to output of master oscillator of alternating voltage. EFFECT: increased functional capabilities. 3 dwg
