International Standard 4185
Measurement of liquid flow in closed conduits -
Weighing method
First edition - 1980-12-15
Ref. No. ISO 4185-1980 (E)
Comparison of instantaneous and mean of flow rate
lt should, however, be emphasized that only the mean value of flow-rate for the filling is given by the weighing method. Instantaneous values of flow-rate as obtained on another instrument or meter in the flow circuit tan be compared with the mean rate only if the flow is maintained stable during the measurement interval by a flow-stabilizing System, or if the instantaneous values are properly time-averaged during the whole filling period.
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