METHOD FOR COMPENSATING THE ELECTRIC VOLTAGE SENSING IN THE ELECTRODE CIRCUIT OF A MAGNETIC-INDUCTIVE FLOWMETER ARRANGEMENT, AND OFFSET VOLTAGE REPLACED BY THE ELECTRICITY CIRCUIT

摘要

In a magneto-inductive flow meter arrangement, compensation for noise voltages occurring in its electrode circuit (1) and for offset voltages originating from amplifier stages (9, 11) connected behind the electrode circuit (1) is carried out by deriving a compensation voltage (UK) from a measuring voltage (UM; UM+; UM-) which, dependent on a threshold value, is generated for as long as the measuring voltage (UM; UM+; UM-) exceeds a predetermined threshold value and is added by way of compensation to a signal voltage (UE) at the input of the amplifier stage (11). …IMAGE…