A2LA ACCREDITATION MAINTAINED, SCOPE EXPANDED

The DHI Calibration Laboratory underwent a biennial assessment for A2LA accreditation in 2003 FEB. As a result, A2LA accreditation of DHI calibration services to ISO/IEC 17025 and ANSI/NCSL Z540-1-1994 is maintained. The scope of measurement capabilities has been expanded and best measurement capabilities improved in some areas. By Mutual Recognition Arrangement, Test Reports and Calibration Certificates issued by A2LA accredited laboratories are accepted on an equal basis by signatories of International Laboratory Accreditation Cooperation (ILAC), European Cooperation for Accreditation (EA), Asian Pacific Laboratory Accreditaiton Cooperation (APLAC), Inter-American Accreditation Cooperation (IAAC) and many other accrediting bodies (visit www.A2LA2.net for additional information).

UNCERTAINTY ANALYSIS FOR FLOW MEASURED BY molbloc-L AND molbloc-S MASS FLOW TRANSFER STANDARDS
DHI Tech Note No. 2011TN06

TYPICAL PRESSURE MEASUREMENT UNCERTAINTY DEFINED BY AN FPG8601 FORCE BALANCED PISTON GAUGE DHI Technical Note 2090TN05 is written to help metrologists understand the influences on measurement uncertainty when using an FPG8601. The document briefly describes the traceability of the FPG8601, ways to reduce uncertainty and some information on the special challenges of measuring low pressure precisely.