Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2007-11-13
2007-11-13
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C702S047000, C702S050000, C702S140000, C073S861030, C073S861420
Reexamination Certificate
active
11355148
ABSTRACT:
Apparatus and associated systems, methods and computer program products relate to monitoring the performance of an operating gas meter by automatic and substantially continuous differential pressure (dP) measurement. Measured dP may be compared against a baseline dP characteristic to determine if the measured dP exceeds a threshold value above a baseline dP characteristic. If the threshold is exceeded, then the system may generate a signal to request repair or replacement of the meter. After installation, some embodiments collect dP data over time and/or over a range of flow rates to automatically learn a baseline dP characteristic under installation conditions. A system may switch from a default baseline dP characteristic to a learned baseline dP characteristic. Some embodiments may further correct volume or flow rate signals for line pressure and/or temperature. Further embodiments provide a passive apparatus to protect a dP sensor against transients in line pressure and/or differential pressure.
REFERENCES:
patent: 6505134 (2003-01-01), Poleshuk et al.
patent: 6654697 (2003-11-01), Eryurek et al.
patent: 2004/0249583 (2004-12-01), Eryurek et al.
patent: 2006/0036404 (2006-02-01), Wiklund et al.
“Testing Large-Capacity Rotary Gas Meters,” by Bean, et al, Research Paper RP1741, vol. 37, Sep. 1946.
“Differential Testing of Rotary Gas Meters” by R. B. Crawford dated May 8, 1968 presented to the American Gas Association Distribution Conference.
“Rotary-Type Gas Displacement Meters,” ANSI B109.3 approved Apr. 13, 2000.
“Differential Testing of ROOTS® Rotary Meters,” RM-90, published Sep. 1998.
IM 5700.3 RPM Series Rotary Meter, American Meter Company, no date.
Dresser, Inc.
Fish & Richardson P.C.
LandOfFree
Flow meter performance monitoring system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flow meter performance monitoring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow meter performance monitoring system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3803167