| Issue |
Int. J. Metrol. Qual. Eng.
Volume 5, Number 3, 2014
|
|
|---|---|---|
| Article Number | 303 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/ijmqe/2014012 | |
| 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),
Pretoria,
South Africa
⋆ Correspondence:
djonker@nmisa.org
Received:
24
September
2014
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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