Međulaboratorijska usporedba rezultata umjeravanja pretvornika tlaka koji koriste ulje kao radni medij

Strapajević, Zvonimir (2017) Međulaboratorijska usporedba rezultata umjeravanja pretvornika tlaka koji koriste ulje kao radni medij. = Interlaboratory comparison of calibration results for pressure transducer using oil as transmitting medium. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Grgec Bermanec, Lovorka.

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Abstract (Croatian)

Najprikladnije sredstvo za praćenje kvalitete rezultata tijela za ocjenjivanje sukladnosti jest, među ostalom, njihovo uključivanje u programe međulaboratorijskih usporedbi. Da bi se mjeriteljski laboratoriji uključili u usporedbeno mjerenje potrebno je sa svima njima postići uniformiran dogovor oko mjernog područja, vrste etalona i korištenog tlačnog medija. Sva mjerenja izvedena su prema DKD-R 6-1 smjernicama, odabran je tip B usporedbe, a mjerni raspon podijeljen je, sukladno normi za tip B, u 9 pojedinačnih mjerenja (0, 2, 4, 6, 7, 9, 11, 13, 15 bar). Proces usporedbe je slijedan, raspodjela predmeta ispitivanja sposobnosti ide od jednog sudionika do drugog, počevši prvo u referentnom laboratoriju (LPM) na Fakultetu strojarstva i brodogradnje, mjerilo tlaka je umjereno prema etalonskoj tlačnoj vagi interne oznake TLVAG_01 koje koristi ulje kao tlačni medij, zatim je išlo redom: BMB Laboratorij Brcković, Gredelj, Laboring, Inspekt, Ravnoteža, DIV Laboratorij i Zavod za ispitivanje kvalitete. Nakon što je predmet usporedbe prošao kroz svih navedenih 7 laboratorija, završno mjerenje je još jednom izvedeno u referentnom laboratoriju. Za sva mjerna područja bilo je potrebno izračunati nesigurnost etalona, rezoluciju mjerila, te doprinose mjernoj nesigurnosti (histereza i ponovljivost) s ciljem dobivanja proširene mjerne nesigurnosti U. Naposljetku je provedena analiza rezultata metodom usporedbe prema E_n vrijednosti .

Abstract

The most appropriate means of monitoring the quality of the bodies' compliance results are, among other things, their inclusion in interlaboratory comparative programs. To have metrological laboratories engaged in comparative measurements, it is necessary to achieve a uniform agreement between them on the measuring area, the type of etalon and the pressure medium used. All measurements were performed according to DKD-R 6-1 guidelines, Type B comparisons were selected and the measurement range was divided into 9 individual measurements (0, 2, 4, 6, 7, 9, 11, 13, 15 bar). The comparison process is followed, the distribution of the subject of the ability test ranges from one participant to the second starting at the Reference Laboratory (LPM) at the Faculty of Mechanical Engineering and Naval Architecture, the pressure measurement is moderate according to the standard pressure vessel of the internal mark TLVAG_01 which uses the oil as a pressure medium, respectively: BMB Laboratory Brckovic, Gredelj, Laboring, Inspekt, Ravnoteža, DIV Laboratory and Zavod za ispitivanje kvalitete. After the subject of the comparison has gone through all of the 7 laboratories, the final measurement was once again performed in the reference laboratory. For all measurement ranges, it was necessary to calculate the uncertainty of the standard, the resolution of the scales, and contribute to the measurement uncertainty (hysteresis and repeatability) with the aim of obtaining the extended measurement uncertainty U. Finally, the result analysis was performed by comparison of E_n values.

Item Type: Thesis (Undergraduate thesis)
Uncontrolled Keywords: međulaboratorijsko; usporedbeno; umjeravanje; tlačna vaga; sljedivost; mjerna nesigurnost
Keywords (Croatian): interlaboratory; comparatively; calibration; pressure scale; traceability; measurable insecurity
Subjects: TECHNICAL SCIENCE > Mechanical Engineering > process energy engineering
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 320 Chair of Thermal and Process Engineering
Date Deposited: 28 Sep 2017 10:32
Last Modified: 10 Oct 2017 15:37
URI: http://repozitorij.fsb.hr/id/eprint/8037

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