Intercomparison of 100 Ω Pt Thermometers of Some Secondary Laboratories of Germany and México (DKD and SNC)

Abstract

On the basis of the Mutual Recognition Agreement signed by different organizations not only the calibration certificates of the National Metrology Institutes, but also the certificates of accredited calibration laboratories should be accepted worldwide. Therefore international intercomparisons should include also secondary laboratories. Such an intercomparison was organized between eight secondary laboratories in Germany and México using platinum resistance thermometers in the temperature range between −20 °C and 250 °C. The results are analyzed using different methods, including Youden diagrams for the evaluation of the capabilities of the laboratories.