INTERLABORATORY COMPARISON IN CALIBRATION OF HARDNESS TESTING MACHINES IN TURKEY

C. Kuzu, E. Pelit

Abstract

One of the best ways for assuring the quality of the calibration results for accredited/non-accredited laboratories is to participate in interlaboratory comparisons. For this reason TURKAK (Turkish Accreditation Agency) and TÜBÝTAK UME (National Metrology Institute of Turkey) for first time had decided to organize an interlaboratory comparison which was piloted by UME Hardness Laboratory in the field of verification/calibration of hardness testing machines (HTM). Besides UME, 9 accredited laboratories participated in the comparison and <i>E</i><sub>n</sub> numbers for all ranges between pilot and each participating laboratory were evaluated. It was a good practice to see differences between laboratories’ uncertainty declarations and applications. In this paper the comparison method and results are explained.

Keywords: Rockwell, Brinell, Vickers, interlaboratory comparison, hardness testing machine
Download: IMEKO-WC-2012-TC5-P4.pdf
DOI: -
IMEKO TC: TC5 - Hardness Measurement

Event details

Event: XX IMEKO World Congress
Place: Busan, REPUBLIC of KOREA
Time: 9 September 2012 - 12 September 2012
Website: http://imeko2012.kriss.re.kr

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