It is important for manufacturers (of food products
especially) to be sure that their flow-measurement equipment is performing
within its designed specifications. Equipment that is not
configured or operating correctly can over-read or under-read, dosing too
little or too much of a
particular liquid into the mix. This can cause
changes to the finished product and cost the company a considerable amount of
money over time, likewise for the measurement of Clean In Place
chemicals and effluent discharge.
A series of tests are performed over the flow range in
which the meter operates. This generally consists of five results:
upper and lower limits, midpoint and two intermediate points.The results obtained are compared for flow rate
against K-factor/meter error; any results that show a marked deviation from
the line of best fit are repeated. This either confirms the result or
eliminates an error.