FACILITY MEASURING SPECIFIC RESISTANCE OF LIQUID MEDIA AND GROUND Russian patent published in 2003 - IPC

FIELD: measurement technology, measurement of technological parameters. SUBSTANCE: facility can be employed to measure specific resistance of liquid media in food, chemical, petrochemical, wood-pulp and paper industries, in metallurgy. Given device includes conductometric cell and measurement unit incorporating generator of rectangular pulses, counter-frequency divider, inverter, source of reference current, bridge commutator of reference current, bridge commutator of measured voltage and D C voltage meter. Output of generator of rectangular pulses is connected to input of counter-frequency divider which first output is connected to inverter and which second output is coupled to input of bridge commutator of reference current. Output of source of reference current is connected to second input of bridge commutator of reference current. Third input of bridge commutator of reference current is connected to inverter and output of bridge commutator of reference current is connected to electrodes of conductometric cell. Input of bridge commutator of measured voltage is connected to output of counterfrequency divider, inverter and electrodes of conductometric cell. Output of bridge commutator of measured voltage is connected to D C voltage meter. EFFECT: raised measurement accuracy. 8 cl, 3 dwg