Equivalent standard volume correction systems for gas meters

Details Equivalent standard volume correction systems for gas meters Equivalent standard volume correction systems for gas meters

G - Physics

01

F

354/30

G01F 1/36 (2006.01) G01F 1/68 (2006.01) G01F 15/04 (2006.01)

Patent

CA 1133140

EQUIVALENT STANDARD VOLUME CORRECTION SYSTEMS FOR GAS METERS Abstract of the Disclosure A self-contained correction unit operable in conjunc- tion with a gas meter measuring an actual gas volume emits a digital output signal correlated to an equivalent standard gas volume therefor by correcting the actual gas volume for prevailing conditions of temperature and/or pressure. A temperature and/or pressure transducer is utilized which when exposed to the gas flow emits an analog voltage signal proportional to absolute values of the sensed parameter. By scaling the transducer output signal to a base condition voltage representing unity, a signal proportional to the desired correction is derived which is converted to a digital signal for supplying to a divider- counter. Within the divider-counter, a series of repeti- tive pulses corresponding to the actual volume measured by the meter is divided by the digital correction signal to yield a digital output signal of the corrected volume at the base condition for which correction was being sought.

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