Technical Working Areas
TÜBİTAK UME Vacuum Laboratory serves in the field of vacuum measurement science. Its main purpose is to provide the pressure unit pascal (Pa) derived from the international system of units SI base units, through absolute pressure (vacuum) measurements at the primary level. Its main tasks are to establish, realize, maintain and develop relevant vacuum measurement standards, to be included in the international measurement system with the international comparisons, and to ensure traceability chain within the country with the services it provides. In this scope, the laboratory provides calibration services through the secondary level vacuum calibration system. It provides the traceability independently from abroad through a primary level National Vacuum Standard, the Multi-Stage Static Expansion System (MSSE1). The laboratory also performs secondary level calibration by comparison method determining the gas flow rate of helium leakage standards. For primary level very low gas flow rate determination measurements in vacuum, constant pressure gas flowmeter (CPFM) installation, performance analysis and characterization studies are underway.Vacuum gauge calibrations are performed on the secondary standard, the VGMS (Vacuum Gauge Metrology System), with a working pressure range of 1 x 10-4 Pa to 1.3 x 105 Pa and relative uncertainty of 8.3 x 10-2 - 7.9 x 10-3. The traceability of the reference standards are provided through the primary vacuum system. The pressure range of the primary system is between 9 x 10-4 Pa and 103 Pa, and the relative uncertainty is 2.1 x 10-3 - 9.5 x 10-4. The primary vacuum standard has been recognized by the European Union, with key intercomparisons (EUROMET.M.P-K1.a and EUROMET.M.P-K1.b).TÜBİTAK UME Vacuum Laboratory has recently participated in the EURAMET.M.P-K15.1 international key comparison and has ensured the continuity of its reliability by getting successful results. TÜBİTAK UME Vacuum Laboratory provides consultancy services on vacuum metrology field, calibration methods of vacuum gauges, measurement techniques and uncertainty calculations, technical requirements required by the relevant organizations during the laboratory establishment and laboratory accreditation.