SELF-DIAGNOSING pH SENSOR

摘要

FIELD: measuring potentiometer electrode impedance for diagnosing and continuously reading measurement results of process parameters. SUBSTANCE: square-wave oscillations are applied to external circuit 78, 84 connected, in its turn, to output of group of electrodes 13 through capacitor 52. Output signal of electrode 13 is converted into width-modulated pulse signal and sampled. These sampled values are used to determine impedance and magnitude of output signal being analyzed. EFFECT: improved design. 1 dwg