Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1988-10-11
1990-05-22
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01F 2500
Patent
active
049266780
ABSTRACT:
A method and apparatus for proving an electronic gas meter at low flow rates includes comparing the rate of descent of the test bell of a bell prover with the instantaneous flow rate measured by a fluid flow measuring circuit for the meter, the rate of descent of the test bell being determined by counting the number of clock pulses which are generated by a clock pulse generator of the test circuitry signal to provide a measure of actual volume flow rate for comparison with the measured volume flow rate obtained from the electronic gas meter.
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On Set Computer Corp., "Tattletale Model III", Application Note, pp. 4, 5 and 10-11, published by Oct. 1988.
Hewlett Packard, "Quadrature Decoder/Counter Interface IC", HCTL-2000; 14 pages; pp. (4-67) through (4-80), from 88-89 Opto Electronic Designers Catalog; Technical Data dated Jan. 1986, published by Oct. 1988.
Gas Research Institute
Noland Tom
Speckman Thomas W.
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