Electromagnetic flowmeter and method for operating an electromagnetic flowmeter

摘要

A magnetic inductive flow (1) sensor has a voltage test unit (7) with separate voltage supply to the amplifier (4) and analogue-to-digital converter (5) and adding a test voltage to the electrode (2, 3) voltages feeding the amplifier with an output comparator (6) to warn (8) if a threshold is exceeded. Independent claims are included for procedures used by the above sensor.