PREVENTING OVERLOADING OF THE ELECTRONIC EVALUATION SYSTEM OF VOLTAGE TIPS IN MAGNETO-INDUCTIVE FLOWMETERS

摘要

The invention relates to a circuit arrangement for preventing overloading of magneto-inductive flowmeters according to the preamble of patent claim 1. The aim of the invention is to protect the amplifiers which are connected downstream thereof or the electronic evaluation system against overloading. To this end, the signal input circuit (D) is provided with additional voltage-limiting diodes (10) disposed downstream of the impedance converters so that eventual voltage tips are prevented during modulation in the downstream amplifiers of the evaluation electronics.