FlowCERT
Flow Cert Second Edition.pdf - Pulsar Process Measurement
Flow Cert Second Edition.pdf - Pulsar Process Measurement
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BS3680 Rectangular Broad Crested Weir<br />
Point of Measurement<br />
The transducer must be above the maximum head P704 by at least the near<br />
blanking distance P107.<br />
The head is measured at a point 3 to 4 times the maximum head upstream<br />
from the weir crest, to ensure the surface of the liquid is not affected by<br />
turbulence or drawdown.<br />
Calculations<br />
ABSOLUTE<br />
If the flow calculation is to be absolute P702 = 1 the flow will be calculated<br />
using the formula: q = (2/3) 1.5 C e b(gh 3 ) 0.5<br />
Where: q = flowrate<br />
Ce = discharge coefficient calculated by <strong>FlowCERT</strong> P723<br />
b = approach width P710<br />
g = gravitational acceleration (nominal value = 980.66 cm/s 2 )<br />
h = head<br />
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