Method and apparatus to reject electrical interference in a...

Details Method and apparatus to reject electrical interference in a... Method and apparatus to reject electrical interference in a...

2007-03-20

2007-03-20

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

C340S620000

Reexamination Certificate

active

10975658

ABSTRACT:
Methods, systems, and computer program products for measuring a capacitance between a probe and a liquid, pausing movement of the probe based on a rate of change of the capacitance, further measuring the capacitance while the probe is paused, and, based on the further measurements, performing one or more of: resuming movement of the probe, determining a position of the probe, aspirating liquid into the probe, and dispensing from the probe. Resuming movement of the probe can include returning iteratively to measuring a capacitance, and the further measuring can be performed for a time interval that can vary based on the further measured capacitance(s), a probe movement characteristic, and/or a sampling rate.

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“Industrial Liquid Level Measurement & Control Application Notes”, American Magnetics, Inc. http://www.americanmagnetics.com/level/industrial%20applications.html (accessed Nov. 13, 2006).
“The Designing and Application of the Helium Liquid-Level Capacitance Probe”, Ryan D. Swain, Alabama A&M University, 1996. sist.fnal.gov/archive/96-topics/papers/Ryan—Swain/ResearchP.doc (accessed Nov. 13, 2006).

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