Regensburg 2000 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
VA: Vakuumphysik und Vakuumtechnik
VA 2: Vakuummesstechnik I: Totaldruckmessung
VA 2.6: Vortrag
Montag, 27. März 2000, 17:00–17:20, H\"orsaal 47
System of primary vacuum metrology in Czech republik — •Jiri Tesar1, L. Peksa2, P. Repa2, and F. Stanek1 — 1Czech Metrological Institute (CMI), Okruzni 31, Brno 63800, Czech Rep. — 2Faculty of Math. ands Physics, Charles University, 18000 Praha 8, Czech Rep.
Since 1993 a distributed system of national measurement standards in Czech republic has been implemented. Czech metrological Institute in Brno coordinate all the activities on the national and primary metrolgical level. The building of system of national primary vacuum metrology in CMI has been started in 1996 in cooperation with Charles University in Prague and cooperation still continue. The primary system is based on piston-cylinder standards (rotating and non-rotating design) and static expansion system, for calibration service in the range from 100 kPa to 0,1 Pa is used system of capacitance gauges MKS Baratron with traceability for Czech primary standards. The calibration service in range 10-1 Pa to 10-4 Pa is realized by spinning rotor gauge with actual traceability to DKD Laboratory Leybold in Germany, but the Czech primary standard for this range based on dynamic expansion techniques is in process of development and realisation. For calibration service is used method of direct comparison with secondary standards in chamber with possibility set up pressure statically or dynamically.
The presentation will be described basic information on primary standards and calibration system include uncertainty budget for each range on primary and secondary level and requirements of Czech industry for vacuum calibration divided by range, physical base of gauge and accuracy.