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Study of performance characteristics of noble metal thermocouple materials to 2000 CThree performance characteristics of noble metal thermocouples in various environments are discussed. Catalytic effects cause significant errors when noble metal thermocouple materials are exposed to air containing unburned gases in temperature ranges from 25 C to 1500 C. The thermoelectric stability of the iridium 40 rhodium to iridium thermocouple system at 2000 C in an oxidizing medium is described. The effects of large and small temperature gradients on the accuracy and stability of temperature measurements are analyzed.
Document ID
19730008851
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Freeze, P. D. (National Bureau of Standards Washington, DC, United States)
Thomas, D. (National Bureau of Standards Washington, DC, United States)
Edelman, S. (National Bureau of Standards Washington, DC, United States)
Stern, J. (National Bureau of Standards Washington, DC, United States)
Date Acquired
September 2, 2013
Publication Date
August 1, 1972
Subject Category
Instrumentation And Photography
Report/Patent Number
NBSR-10-949
NASA-CR-120990
Report Number: NBSR-10-949
Report Number: NASA-CR-120990
Accession Number
73N17578
Funding Number(s)
CONTRACT_GRANT: NASA ORDER C-67546-B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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