FIRST INTERLABORATORY COMPARISON ON CALIBRATION OF DIAMETER STANDARTS IN TURKEY

O. Ganioglu, I. Meral
Abstract:
Having successfully completed two EURAMMET Key Comparisons (EUROMET Project No. 384 and Project 812) with very good results led us as TUBITAK UME Dimensional Laboratory to organize the first interlaboratory comparison on calibration of diameter standards in Turkey as a pilot laboratory during 2012 and 2013. Interlaboratory comparisons are one of the best ways to disseminate SI units within the country, thus assuring the reliability and quality of calibrations and their results for accredited/non-accredited laboratories. The main purpose of the comparison is to demonstrate the differences between the capability of the laboratories and their uncertainty declarations on accreditation scopes.
12 accredited laboratories which provide routine calibration services to the industry, participated in the comparison. The standards to be calibrated were one ring gauge of diameter 40 mm, one plug gauges of diameters 50 mm, one sphere of diameter 25 mm and a pin gauge of diameter 2.5 mm. The measurand is the diameter of transfer standards in a given measurement direction at different heights, determined for each standard. All measuring instruments used by the participating laboratories are commercially available universal measurement devices. Determination of the statistical consistency of the results with the uncertainties given by the participants can be assessed by the method of “En” value assessment for each laboratory. “En” values for all measurement results between pilot and each participated laboratory is calculated.
In this paper the comparison method and results are explained and “En” values of the participants are presented.
Keywords:
diameter standards, interlaboratory comparison
Download:
IMEKO-WC-2015-TC14-286.pdf
DOI:
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Event details
Event name:
XXI IMEKO World Congress
Title:

Measurement in Research and Industry

Place:
Prague, CZECH REPUBLIC
Time:
30 August 2015 - 04 September 2015
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