Method and device for detecting faults in inductive conductivity measurements of a fluid medium

摘要

A method for detecting a failure of a measuring device for inductively measuring the electrical conductivity ofa fluid medium with a sensor comprising at least one coil (L1, L2), in particular an excitation coil (L1) or an induction coil (L2), to apply to the fluid medium or received from the fluid medium an alternating current, said method comprising the following steps: - applying at least one coil (L1, L2), an additional excitation signal which is a continuous stream , additional cuyaseñal is delivered from a power supply to said coil (L1, L2) through a resistance devalor high, to generate in said coil (L1, L2) a corresponding derived signal, that characterizes a condiciónde fault / no fault measuring device; - measuring submitted to obtain a measurement value signal; - comparing the measured value to at least one threshold value; - depending on the result of the comparison operation, fire or cause an action demedición device.