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gas flow measurements

International Journal of Metrology and Quality Engineering (1)

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Gas flow calibrations performed at the National MetrologyInstitute of South Africa (NMISA)
D. Jonker, E.P. Tarnow
Journal:

International Journal of Metrology and Quality Engineering / Volume 5 / Issue 3 / 2014

Published online by Cambridge University Press:

03 November 2014, 303

Print publication:

2014
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The National Metrology Institute of South Africa (NMISA) Gas Flow Laboratory providestraceability to the South African Industry for gas flow measurements. A new primarystandard 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 standardare accuracy, speed and convenience. This paper describes the activities of the NMISA GasFlow Laboratory – a discussion of the primary standard, the validation thereof,calibration methods for client instrumentation, analysis of measurement results and thecalculation of measurement uncertainties.