The creation of specialized measurement tools for deep integration into modern digital process control systems is became possible only when using microprocessor devices in measuring converters. However, today the improvement of the main characteristics of measuring instruments in modern systems of automatic control systems through the use of microprocessors is largely exhausted with a significant margin of performance of the latter. Therefore, it is now an urgent task for the further improvement of means of measurements is to search for new variants of creation of intellectual means of measurement. Within the framework of this task, the functional schemes of intelligent temperature measuring transducers are studied in the article and the algorithms for assessing their metrological serviceability in the process of operation in modern ACS are proposed. Proposed, justified and tested on the experiment an algorithm for evaluating the accuracy of the measurement of thermocouple resistance in the process.