METHOD FOR DETERMINING AN ELECTRICAL FAULT OF A CONDUCTIVITY SENSOR, AND CONDUCTIVITY SENSOR

摘要

The present invention relates to a method for determining an electrical fault of a conductivity sensor (100) for determining the electrical conductivity of a medium according to the conductive principle, and to a conductivity sensor (100) having a first electrode pair (110) which is designed to be completely arranged in the medium. The method according to the invention comprises applying an electrical AC voltage to the first electrode pair (110), determining the temporal profile of the electrical alternating current, which is produced in response to the application of the electrical AC voltage to the first electrode pair (110), at the first electrode pair (110), determining a current-amplitude characteristic value of the determined temporal profile of the electrical alternating current, and determining an electrical fault of the first electrode pair (110) if the determined current-amplitude characteristic value is below a first current threshold value or above a second current threshold value. An electrical fault of a second electrode pair (120) of the conductivity sensor can also be determined.