Non-dismantling method of testing of thermocouples electrodes conditions

Abstract

The goal of this paper is to create the method of selftesing of thermocouples on operating place. This goal is achieved using equivalent operating time of thermocouples use. The method doesn’t require replacement of thermocouples from operating place. It is provided during operation of thermocouples. The necessary condition that makes selftesting possible is constant hot junction temperature during procedure of selftesing. Determined equivalent operating time allows finding place of a given thermocouple in thermocouple drift model as well as in model of the thermoelectric inhomogeneity.