FIELD: physics.
SUBSTANCE: apparatus has an aspirating chamber with a power supply, switches, a processing device and a display device, a control device for transmitting an arithmetic shift signal to the display device, an integrator, a voltage comparator and two circuits, each consisting of series-connected capacitor and switch and each of the circuits is connected in parallel to the capacitor of the integrator in the processing device, wherein capacitance of the capacitor in the first circuit is n times greater than that of the capacitor of the integrator of the processing device, and capacitance of the capacitor in the second circuit is n times greater than the sum of capacitances of the integrator and the capacitor in the first circuit, wherein the base of the number system used in the display device is equal to (n+1). The first input of the comparator is connected to the output of the processing device, the second input is connected to a reference voltage source, and its output is connected to the control device, whose additional outputs control the state of the switches.
EFFECT: wider range of measuring concentration of ions.
2 cl, 4 dwg
| Title | Year | Author | Number |
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SU892285A1 |
