| 摘要 |
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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