Abstract
The metrology area has taken a step forward with regard to the uncertainty calculation. This mathematical tool used in laboratories is essential to ensure that the values resulting from a measurement are reliable. For this to be possible, all equipment used in a measurement process must be reliable and, above all, traceable to the international metrology system. We propose to present in this work: (i) the development and calibration of a microcontrolled time device with a resolution of 1x10-4 s, in order to characterize the time greatness and make it re-producible; (ii) the calibration of the quartz clock present in a computer present in the dosimetry laboratories; (iii) a more in-depth study of the influence of time quantity on calibrations of instruments used in the area of radiological protection, diagnostic radiology and radiotherapy, with measurements performed on the Kerma magnitude in air or its rate.
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