Expressing uncertainty of measurement

Abstract

Master´s thesis is focused on measurement uncertainty problems, particularly on the uncertainty determination and then on the practical application. The thesis is divided into three parts. A theoretical part deals with issues concerning uncertainties on the theoretical level, transition from the measurement error to the measurement uncertainty. This part also clarifies the basic terms concerning this issues based on “ČSN ISO 5168” standard and another legislative materials. The other part is focused on temperature regulations by thermostatic heads and valves. This part also handles thermostatic heads and valves history, division, generally use and legislative background represented by standard „EN 215“. Practical part follows previous sections. I am determining the measure uncertainty of thermostatic heads and valves flow characteristic determining device. All the results and knowledge obtained are given in the conclusion of the thesis