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Summary
This study calibrated Gapmeter flowmeters using air, argon, and oxygen, finding linear calibration graphs. Low flow Gapmeters showed high susceptibility to back-pressure, indicating a critical operational limitation.
Area of Science:
- Fluid dynamics
- Instrument calibration
- Metrology
Background:
- Accurate flow measurement is crucial in various scientific and industrial applications.
- The Gapmeter Lab Kit series is commonly used for flow rate determination.
Purpose of the Study:
- To calibrate the Gapmeter Lab Kit series of flowmeters.
- To assess the impact of different priming gases on flowmeter calibration.
- To identify operational limitations, particularly concerning back-pressure.
Main Methods:
- Flowmeters from the Gapmeter Lab Kit series were calibrated using air as the primary calibration gas.
- Two specific flowmeters were further calibrated using argon and oxygen as priming gases.
- Calibration data was plotted to generate linear calibration graphs.
Main Results:
- Linear calibration graphs were successfully obtained for all tested Gapmeters.
- The calibration process yielded consistent results across different priming gases for the two tested flowmeters.
- A significant finding was the extreme susceptibility of the two low flow Gapmeters to back-pressure.
Conclusions:
- The Gapmeter Lab Kit series flowmeters demonstrate linear calibration characteristics when used with air.
- Argon and oxygen can be effectively used as priming gases for calibrating certain Gapmeter models.
- The operational range of low flow Gapmeters is severely limited by their sensitivity to back-pressure, necessitating careful system design to avoid this issue.