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Thermocouple Calibration and Accuracy in a Materials Testing LaboratoryA consolidation of information has been provided that can be used to define procedures for enhancing and maintaining accuracy in temperature measurements in materials testing laboratories. These studies were restricted to type R and K thermocouples (TCs) tested in air. Thermocouple accuracies, as influenced by calibration methods, thermocouple stability, and manufacturer's tolerances were all quantified in terms of statistical confidence intervals. By calibrating specific TCs the benefits in accuracy can be as great as 6 C or 5X better compared to relying on manufacturer's tolerances. The results emphasize strict reliance on the defined testing protocol and on the need to establish recalibration frequencies in order to maintain these levels of accuracy.
Document ID
20020061400
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Lerch, B. A. (NASA Glenn Research Center Cleveland, OH United States)
Nathal, M. V. (NASA Glenn Research Center Cleveland, OH United States)
Keller, D. J. (Real World Quality Systems Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
April 1, 2002
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:211507
E-13284
NASA/TM-2002-211507
Funding Number(s)
PROJECT: RTOP 708-31-13
Distribution Limits
Public
Copyright
Public Use Permitted.

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