PVTt primary flow standard for small gas flow rates

• Abstract:

  A PVTt primary flow standard operates on the principle of determining the change of density of the measured gas in the tank of a known volume and the corresponding time interval. The PVTt standard presented in this paper is based on the diverter-operated flying start and finish method. It contains the gas collection tank that is constructed as a dismountable assembly, which enables determining its internal volume by dimensional measurements. The standard is designed for the flow range from 0.12 mg/min to 12 mg/min and it achieves the relative expanded measurement uncertainty between 0.12% and 0.24%. We performed a comparison of the realized PVTt flow standard with the piston-prover flow standard for flow rates above 1.2 mg/min, and the results were found successful in view of normalized errors, En.
• Download:

  IMEKO-TC9-2019-063.pdf
• DOI:

  _unreg_tc9-2019.063

Event details:

• IMEKO TC:

  TC9
• Event name:

  FLOMEKO 2019
• Title:

  18^th International Flow Measurement Conference 2019

• Place:

  Lisbon, PORTUGAL
• Time:

  26 June 2019 - 28 June 2019