Pressure comparison in the range from 0.8 to 8 MPa between the UME (Turkey) and the CNR-IMGC (Italy) in gas media and gauge mode

Orhan, Melek; Kangi, Rifat; Akgül, Ali; Molinar, G F

doi:10.1016/s0263-2241(97)00068-7

Cited by 2 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…The parameters to be measured were the effective area of the UME piston-cylinder assembly, expressed as the effective area at atmospheric pressure and 20 C, and its pressure distortion coefficient λ. Details of the pressure balances, measurement setup and procedures used by participants, together with an analysis of the results, are given in [1].For each measurement, the pressure of the UME system was calculated using the values determined in 1993 [2] for the effective area and the pressure distortion coefficient of the UME piston-cylinder assembly. The corresponding and λ values of the IMGC piston-cylinder unit had been determined by comparison against a national primary standard of the IMGC [3].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Final report: Comparison of pressure standards in the range 0.8 MPa to 8 MPa (gas media, gauge mode)

Orhan¹

1998

Metrologia

View full text Add to dashboard Cite

Comparison of pressure standards in the range 0.8 MPa to 8 MPa (gas media, gauge mode) Participants TR (T ÜB İTAK-UME), IT (CNR-IMGC) Organizing body Bilateral ResultsA comparison of the pressure standards of the T ÜB İTAK, Ulusal Metroloji Enstitüsü (UME), Turkey, and the Consiglio Nazionale delle Richerche, Istituto di Metrologia "G. Colonnetti" (CNR-IMGC), Italy, in the pressure range 0.8 MPa to 8 MPa in gas media and gauge mode took place at the T ÜB İTAK-UME in 1996. This work was carried out using two similar piston-cylinder units in tungsten carbide having a nominal effective area of 49 mm 2 , both units being oil-lubricated. The parameters to be measured were the effective area of the UME piston-cylinder assembly, expressed as the effective area at atmospheric pressure and 20 C, and its pressure distortion coefficient λ. Details of the pressure balances, measurement setup and procedures used by participants, together with an analysis of the results, are given in [1].For each measurement, the pressure of the UME system was calculated using the values determined in 1993 [2] for the effective area and the pressure distortion coefficient of the UME piston-cylinder assembly. The corresponding and λ values of the IMGC piston-cylinder unit had been determined by comparison against a national primary standard of the IMGC [3]. The relative pressure difference between the UME and IMGC systems was found to be between 5.8 10 -6 and 17.4 10 -6 . In all cases, the difference between the UME and IMGC pressures divided by the root-sum-square of their standard uncertainties was found to be much less than one. Thus, this comparison confirmed the agreement between the pressure scales of Italy (CNR-IMGC) and Turkey (T ÜB İTAK-UME) in gas media (gauge mode) from 0.8 MPa to 8 MPa, within the combined relative standard uncertainties of 11 10 -6 for the IMGC and 25 10 -6 for the UME [1]. Using these results, the effective area of the UME system was redetermined (see Table 1). The relative difference between the new (1996) value and the previous (1993) value used by the UME is 11.8 10 -6 . This comparison resulted in a reduction of the uncertainty of the effective area of the UME piston-cylinder assembly, from 40 10 -6 to 22.3 10 -6 ( = 2). Consequently, a reduction has also been achieved in the uncertainty of pressure measurements performed by the UME over the pressure range 0.8 MPa to 8 MPa; this uncertainty is now 23.1 10 -6 ( = 2). The effective area and the pressure distortion values obtained, along with their estimated uncertainties , are given in Table 1; all uncertainties are quoted at the = 2 level.Table 1. Results obtained on the effective area of the UME piston-cylinder assembly.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Final report: Comparison of pressure standards in the range 0.8 MPa to 8 MPa (gas media, gauge mode)

Orhan¹

1998

Metrologia

View full text Add to dashboard Cite

show abstract

“…Measurements are carried out periodically to check the agreement of pressure measurements between countries and to harmonize the network connecting the primary standards of national metrology institutes throughout the world. Within the EUROMET framework, comparisons are made between pressure balances both to verify their metrological characteristics and to standardize the operating conditions for industrial pressure measuring systems worldwide [2]. For this purpose, pneumatic pressure comparison measurements were carried out in the range 15 kPa to 7 MPa between the CMI and the UME in June and July 1999.…”

Section: Euromet (European Collaboration In Measurementmentioning

confidence: 99%

Pneumatic gauge pressure comparison measurements between the UME (Turkey) and the CMI (Czech Republic) EUROMET project No. 537

Orhan¹,

Calkin²,

Tesař³

et al. 2001

Metrologia

View full text Add to dashboard Cite

The results are presented of a bilateral comparison of pneumatic pressure measurements, carried out in the framework of EUROMET Project No. 537, between the Cesky Metrologicky Institut (CMI, Czech Republic) and the TÜBITAK-Ulusal Metroloji Enstitüsü (UME, Turkey). The measurements, in the range 15 kPa to 7 MPa, were carried out in two phases: (i) 18-24 June 1999 at the Pressure Section of the CMI in the range 15 kPa to 350 kPa; (ii) 29 June-8 July 1999 at the Pressure Section of the UME in the ranges 0.25 MPa to 1.75 MPa and 1 MPa to 7 MPa. Three different gas-operated reference standards were used. For the ranges 15 kPa to 350 kPa and 0.25 MPa to 1.75 MPa these were piston-cylinder assemblies with ceramic pistons and tungsten-carbide cylinders and nominal effective areas of 10 cm2 and 2 cm2, respectively. For the range 1 MPa to 7 MPa, a piston-cylinder assembly with tungsten-carbide piston and cylinder and a nominal effective area of 0.5 cm2 was used. The purpose of the measurements was to compare the effective areas of the Czech and Turkish primary pressure standards in gas media and gauge mode, and to confirm the agreement between the pressure scales of the two countries in the range 15 kPa to 7 MPa by application of the cross-floating method. Since the UME and the CMI are participating in different loops of EUROMET Project No. 439, a key comparison of pneumatic pressure, another important goal of this study was to establish a cross-link between the two loops.

show abstract

Pressure comparison in the range from 0.8 to 8 MPa between the UME (Turkey) and the CNR-IMGC (Italy) in gas media and gauge mode

Cited by 2 publications

References 3 publications

Final report: Comparison of pressure standards in the range 0.8 MPa to 8 MPa (gas media, gauge mode)

Final report: Comparison of pressure standards in the range 0.8 MPa to 8 MPa (gas media, gauge mode)

Pneumatic gauge pressure comparison measurements between the UME (Turkey) and the CMI (Czech Republic) EUROMET project No. 537

Contact Info

Product

Resources

About