Characterization of liquid thermometry bath

U sklopu Završnog rada provedeno je ispitivanje karakteristika termometrijske kupke Heto Calibration, koja će se koristi kao zona kontrolirane temperature pri usporedbenom umjeravanju termometara. Kupka je ispunjena vodom, a ispitivanje je provedeno u temperaturnom rasponu od 10 °C do 70 °C. Kao i u svim drugim umjeravanjima, i ovdje su prisutne određene nesigurnosti, stoga se provedenim ispitivanjem određuju parametri koji imaju utjecaj na mjernu nesigurnost kupke. Ispitivanjem je obuhvaćeno određivanje horizontalnih i vertikalnih temperaturnih gradijenata te stabilnosti temperature u izotermalnom bloku uronjenom u radni medij, a provodi se prema metodi Laboratorija za procesna mjerenja, koja je razvijena na Fakultetu strojarstva i brodogradnje u Zagrebu. U radu je opisana i objašnjena korištena metoda ispitivanja uz prikaz pripadajućih shema, parametara i formula. Rezultati ispitivanja prikazani su tablično i grafički, te je uz njih također opisana i korištena oprema te cijeli postupak mjerenja.Within this bachelor thesis thermometric characteristics of Heto Calibration bath are examined and will be used as controled temperature zone with simultaneous calibration of the thermometer. The bath is filled with water and research is conducted in the temperature range from 10°C to 70 °C. Just like with any other calibration there is some uncertainty. Because of that certain parameters that influence measurement uncertainty of the bath, are determined. This research covers determination of horizontal and vertical temperature gradient and stability of temperature in isothermal block submerged in work media. It is conducted according to the method of the Laboratory for process measurements, developed at the University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. In the paper examination methods are described and explained with associated schemes, parameters and formulas. The results of the examinations are exhibited in the table and graphically also the equipment and measurement procedure are described