Height difference effects between the standard and the equipment under test in calibration process for sphygmomanometers in Colombia

Abstract

Height difference effects between the standard and the equipment under test, in calibration process for sphygmomanometers in Colombia is contemptible unto onemeter height differences within them. When is applied for standard lecture corrections and uncertainty measures effects with a 95,45% probability with T Student distribution, calculated for Colombian’s cities with most and less gravitational acceleration, relative humidity (RH) among 20% and 80% and temperatures within 15ºC and 25ºC according to the R 16-1 Annex A.1 of International Organization of Legal Metrology OIML. The demonstration was realized with simplified calculus of air density given by the International Committee for Weights and Measures 2007, which are based on RH, temperature and atmospheric pressure, and the gravitational accelerations given by the national gravimetric network of first and second order SIGNAR in the thesis Determination of the vertical reference surface for Colombia made by Laura Sánchez Rodríguez Technische Universität Dresden Germany 2003.