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View Paper |
Session Topic: 9E, Flow Session |
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Paper Title: High-Speed Prover Systems for Cost-Effective Mass Flow Meter and Controller Calibration |
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Date & Time: THURSDAY, August 8, 2002 |
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8:30 - 10:00am PARALLEL SESSIONS - SESSION 9 |
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Speaker: Harvey Padden
Bios International Corp. |
Email: padh@biosint.com www.biosint.com |
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There has long been a need for fast, cost-effective primary flow calibration systems to use with mass flow meters and mass flow controllers in the1 mL/min to 50 L/min range. The provers described here use a clearance seal between a graphite piston and borosilicate glass cylinder. They are small, portable, fast, and contain no toxic materials. Clearance-sealed volumetric laboratory master provers have been produced with an expanded uncertainty on the order of 0.07% (we will review the uncertainty analysis). These are calibrated by dimensions and form the basis for the system. Stable flow generators are used as transfer flow sources for the calibration of 0.5% standardized provers by the laboratory master provers. We will present an uncertainty analysis of these provers. The laboratory master provers also provide the design basis for 0.25% standardized provers. The standardized provers are used in conjunction with the stable flow generator to form a primary calibration system for mass flow meters and controllers. |
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