A method for evaluation of the inhomogeneity of thermoelements

Autor:	Y A Abdelaziz, F. Edler
Rok vydání:	2009
Předmět:	Materials science Applied Mathematics Homogeneity (statistics) Mechanics engineering.material Thermocouple Seebeck coefficient Thermoelectric effect engineering Calibration Measuring instrument Noble metal Instrumentation Engineering (miscellaneous) Base metal
Zdroj:	Measurement Science and Technology. 20:055102
ISSN:	1361-6501 0957-0233
DOI:	10.1088/0957-0233/20/5/055102
Popis:	Thermoelectric inhomogeneity is the spatial variation of the Seebeck coefficient along a thermoelement. It is often considered to be the largest contribution of an uncertainty budget in thermocouple calibration. In this work, investigations of inhomogeneities were performed on single thermoelements, using a heater with short movable heating zones (two-gradient method). We chose platinum wires which are commonly used in noble metal thermocouples and copper wires which are available in good homogeneity and which are commonly used in base metal thermocouples. The results of different investigations of the thermoelements are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8a5d119a9fe4e54f0daefc21cfd7f471 https://doi.org/10.1088/0957-0233/20/5/055102 Zobrazit plný text záznamu