The thermoelectric inhomogeneity as a function of position along wires is one the significant uncertainty of measurement using thermocouples. Here we report development of an electrical annealing system for thermoelectric inhomogeneity treatment. Two inhomogeneous type-S thermocouples, which had the inhomogeneity greater than 0.04%emf, are successfully recovered using the system. An improvement on thermocouple performance as large as 0.28 °C (at temperature of 1000 °C) can be obtained using the system. This article provides detailed information and may help the reader to obtain a quick grasp about the system.
To accommodate current technological developments and laboratory conditions, ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) published the latest version of the ISO/IEC 17025 standard in 2017.Complying with ISO/IEC 17025:2017 enables laboratory to provide measurement results that are valid and traceable to international unit system. SNSU-BSN as National Metrology Institute (NMI) in Indonesia has transformed its management system from the old version ISO/IEC17025:2005 to the current ISO/IEC 17025:2017 in 2019. This study explains the process of SNSU-BSN transition in order to establish a management system complying with ISO/IEC 17025:2017. A comparison between the implementation of the old and the current ISO/IEC 17025 was explained along with its impacts and benefits.
Komponen yang memiliki kontribusi terbesar pada ketidakpastian sistem kalibrasi termometer inframerah adalah emisivitas media kalibrasi (benda-hitam). Pada penelitian ini telah dilakukan verifikasi terhadap nilai ketidakpastian emisivitas benda-hitam tersebut. Dari penelitian ini diperoleh kenyataan bahwa nilai ketidakpastian emisivitas benda-hitam yang untuk panjang gelombang (8-14) µm besarnya pada t = 50 ⁰C adalah 0,12 ℃, dan pada t = 500 ℃ adalah 0,69 ℃. Substitusi ketidakpastian ini kedalam persamaan ketidakpastian sistem kalibrasi termometer inframerah menghasilkan ketidakpastian sebesar 2,2 C ~ 2,4 C untuk panjang gelombang (8-14) m dan rentang suhu 50 C -500 C.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.