Open AccessA program for conformity assessment of the calibration results with the specification
Author(s) -
Srđan Damjanović,
Predrag Katanić
Publication year - 2019
Publication title -
international journal of electrical engineering and computing
Language(s) - English
Resource type - Journals
ISSN - 2566-3682
DOI - 10.7251/ijeec1901009d
Subject(s) - accreditation , calibration , conformity assessment , computer science , conformance testing , certificate , traceability , certification , metrology , multimeter , process (computing) , reliability engineering , software engineering , statistics , engineering , mathematics , programming language , operating system , electrical engineering , algorithm , voltage , political science , law , economics , economic growth
This paper describes the procedure for calculating the conformance probability of the results of the calibration with therequirements or specifications (standards or manufactures), including borderline cases. An original program created in Excel waspresented, which makes it easy to calculate in a Metrology Laboratory. During the development of this program, the recommendationsof the European Accreditation Team (EA), as well as the requirements of ISO / IEC 17025: 2017, were taken into account. The goal ofthis program is to provide the customer with a certificate of calibration with the declared uncertainty as well as the compliance of theresults of the calibration with the requirements or specifications. The program was developed for the needs of the MetrologyLaboratory, which is located in the company ORAO a.d. Bijeljina. The accreditation body at the accreditation examination of theMetrology Laboratory checked the results of the program. The international standard ISO 10576-1: 2003 describes the procedure forcalculating the conformance probability of the calibration results with the specification. According to the described procedure, eachcalibration result must first be graphically presented according to normal PDF (Gaussian distribution). Then, in order to determine theprobability of occurrence of any measured value, use the z-value and the standard surface tables below with normal PDF. In metrologylaboratories, this is a difficult and long-lasting process because the digital multimeter can be calibrated at even a hundred measuringpoints.