CCRI, RMO Or Bilateral COMPARISON REPORT

DOCUMENT JCRB-9/9(1)

STATUS REPORT ON CCXX OR RMO COMPARISON 1. CCM Section/Field: Density 2. CCXX Ref No (to be completed by the BIPM): 3. Type of comparison: CCXX RMO X 4. Subject area: Liquid density Key Supplementary X Pilot study 5. Participating institutes (and countries): INRIM (IT), LNE (FR), GUM (PL), NMI (RO), IPQ (PT) Bilateral 6. Pilot laboratory: INRIM (IT)

7. Measurand, unit and nominal value(s): Density,g. cm-3 ; 0,600 g.cm-3 – 1,300 g.cm-3 8. Description: During the EURAMET TC – Mass Contact Persons Meeting in Malta (2nd to 4th March), it was proposed that a "Supplementary Comparison" on Density Hydrometer calibration shall be conducted. This comparison deals with the calibration of three hydrometers with the aims:  Upgrade the existing CMC entries and allowing to new participant laboratories to submit new CMC for the hydrometer calibration at the temperature of 20 °C;  Extend the CMC entries for the hydrometer calibration in the range of temperature 15°C and 30 °C;  Evaluate the temporal stability of hydrometers used as Transfer standards. For the purpose of this comparison it is proposed to calibrate three hydrometers previously used as transfer standards in the regional Key comparisons EUROMET.M.D-K4, each one on four stated scale marks.

9. Progress: (Please note date and tick appropriate box to indicate current status)

Date Status Pilot Supplementary Key 7/4/11 Proposed to CCMD X Accepted and registered Protocol submitted to CCXX Protocol agreed Measurements in progress Measurements completed Report in progress Draft A Draft A Draft B Draft B Report submitted to CCXX Results approved Approved for Equivalence Progression to Key Comparison Abandoned Comments: Publication reference:

Completed copy to be forwarded to a) CCXX Executive Secretary, b) relevant Key Comparison WG Chairman and c) Regional coordinator as appropriate DOCUMENT JCRB-9/9(1) 10. Measurement start date: 11. Expected measurement completion date: May 2011 2012

12. Contact person’s name: Salvatore Lorefice Address:

Telephone: Fax: e-mail Web address:

13. Contact Person’s signature: 14. Date:

Completed copy to be forwarded to a) CCXX Executive Secretary, b) relevant Key Comparison WG Chairman and c) Regional coordinator as appropriate