Int. J. Metrol. Qual. Eng.
Volume 5, Number 3, 2014
|Number of page(s)||5|
|Published online||03 November 2014|
Gas flow calibrations performed at the National Metrology Institute of South Africa (NMISA)
National Metrology Institute of South Africa (NMISA),
Accepted: 11 June 2014
The National Metrology Institute of South Africa (NMISA) Gas Flow Laboratory provides traceability to the South African Industry for gas flow measurements. A new primary standard for gas flow calibrations was purchased and commissioned. With three flow cells, a flow range of 0.5 mL/min to 50 000 mL/min is covered. The main features of this standard are accuracy, speed and convenience. This paper describes the activities of the NMISA Gas Flow Laboratory – a discussion of the primary standard, the validation thereof, calibration methods for client instrumentation, analysis of measurement results and the calculation of measurement uncertainties.
Key words: Traceability / gas flow measurements / primary standard / calibration methods / measurement uncertainties
© EDP Sciences 2014
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