This is a paper written for Infrared Thermographers, presented at the IR/INFO Conference, January 2003, in Orlando Florida, USA.
It is intact in every way, except it has been reformatted slightly to make it easier to read online. There is also a PDF version that can be downloaded from a link at the end of the article, if you wish to keep a copy for further reading.
The R&R (Repeatability and Reproducibility) of temperature-measuring devices applies to quantitative thermal imagers as well as the most precise temperature sensors used in standards calibration laboratories. Once you understand what’s involved with R&R and how it can affect the results of your measurements, you will think about real temperature and temperature difference measurements in a new way. The links to calibration and traceability are then relatively easy steps to take. The significance of calibration of a temperature-measuring thermal imager and the likely uncertainty of results in the field begin to make real sense. A better understanding of these measurement fundamentals can help you relate measurement results and their confidence limits. Continue reading →