1. 1 EUROMET TC FLOW MEETING Thessaloniki - 2005 LPGF subgroup Review of activities during year 2004 Zoe Metaxiotou

2. 2 EUROMET TC FLOW LPGF subgroup members * NMiThe NetherlandsG. Blom FORCEDenmarkJ. Busk UMETurkeyV. Cifci IMGCItalyG. Cignolo OMHHunguryC. Czibulka MIKESFinlandS. Sillanpaa GUMPolandM. Kusyk-Ring BEVAustriaM. Macek PTBGermanyR. Kramer / B. Mickan CMICzech Rep.T. Valenta LNEFranceJ.P. Vallet EIMGreeceZ. Metaxiotou / Convenor *As configured within Euromet TC Flow 13.04.2004

3. 3 Bratislava meeting – Main conclusions I.Several CMC entries need supporting evidence for claimed capabilities in the field of low pressure gas flow. II.Gas flow measurement at low flow rates (below 30 l/min) is an area of major metrological interest where no extended intercomparisons within Euromet Flow group have taken place.

4. 4 LPGF Current status I. BIPM CMC database - Questions 1.Are claimed capabilities as depicted in the database fully supported? 2.If NOT why? New lab, equipment, personnel? Supporting evidence “too old”? 3.Has supporting evidence “expiration date”? If YES: Criteria? Agreement upon realistic rules?

5. 5 LPGF Current status I. BIPM CMC database - What next? 1.Revision – When? Each LPGF subgroup member creates an up-to- date list of the submitted entries that need supporting evidence. LPGF subgroup convenor summarizes the findings and starts a discussion about actions to be taken. 2.Main Target  By the end of 2005 reach an agreement about certain actions that will provide the basis for scientific support for all claimed capabilities within LPGF field.

6. 6 LPGF Current status II. New Proposed Project Registered as Euromet No 806 Discussions started in Bratislava last March. NEL offered a Molbox1/Molbloc system as TS. Euromet Project No 806. Comments received from members of LPGF subgroup and other Euromet members contributed to the formulation of a new proposal which has been registered as Euromet Project No 806. Pilot Labs: Pilot Labs: NEL (UK), EIM (Greece) Organization: Organization: Z. Metaxiotou (EIM), Cliff Probert (NEL) Assisting Lab: Assisting Lab: M. Van der Beek (NMi)

7. 7 LPGF Current status Brief Technical Description  Transfer package consists (basically) of:  2 Molbloc flow meters  2 Mass flow controllers  Test gases:  Nitrogen 99,998 % (1 st circulation)  Air from lab supply (2 nd circulation)  Test flow rates:  2.0 – 20 mg/s (0.1 – 1 l/min) – Molbloc A  65 – 650 mg/s (3.0 – 30 l/min) – Molbloc B

8. 8 LPGF Current status Current Project Status Eight (8) participants up to date (Others are invited to join!)  NEL (UK) – Cliff Probert  EIM (Greece) – Zoe Metaxiotou  NMi (The Netherlands) – M. Van der Beek / G. Blom  IMGC (Italy) – G. Cignolo  MIKES (Finland) – S. Sillampaa  METAS (Switzerland) – Bernhard Niederhauser  PTB (Germany) – R. Kramer / B. Mickan  CMZ (Czech Republic) – J. Tesar / Z. Krajicek

9. 9 LPGF Current status Current Project Status A detailed draft technical protocol has been prepared by NEL and circulated among all LPGF subgroup members. A provisional project schedule for the 1 st circulation of the TS has been proposed and is subject to discussion. The revised technical protocol will be prepared after the Euromet meeting.

10. 10 LPGF Current status Provisional Project Schedule – 1 st TS circulation CountryCityLaboratoryTypeDate UKEast KilbrideNELPilotOctober 05 GreeceThessalonikiEIMPilotNovember 05 NetherlandsDordrechtNMiAssistingDecember 05 Czech RepPadubiceCMZParticipantJanuary 06 ItalyTurinIMGCParticipantFebruary 06 FinlandHelsinkiMIKESParticipantMarch 06 SwitzerlandBern-WabernMETASParticipantApril 06 GermanyBraunschweigPTBParticipantMay 06 UKEast KilbrideNELPilotJune 06

11. 11 LPGF Current status Project Test Program – 1 st TS circulation MolblocMFC Voltage (V) Nominal Flow Rate (mg/s) Nominal Flow Rate (l/min) Nominal Molbloc Upstream Pressure (kPaa) A0.52.00.1285-295 A2.511.00.5285-295 A5.020.01.0285-295 B0.565.03.0280-290 B2.5320.015.0260-270 B4.5570.025.0250-260 Nitrogen (99.998%) will be used at the test gas

12. 12 LPGF Current status Schematic Diagram of Molbox 1/Molbloc System

13. 13 LPGF Current status Summary 1.New participants? Please, register! 2.Final comments  Send them to Cliff Probert (NEL) cprobert@tuvnel.com or Zoe Metaxiotou (EIM), zoe@eim.org.gr zoe@eim.org.gr  Dead line for replies: April 1st, 2005 3.Finalization of the Project Schedule. 4.Revised technical Protocol to be submitted by C. Probert in July 2005.