What levels of verification/calibration are there?

Although there are many ways to provide a better level of confidence, there is only one true way to calibrate – comparing one flow reading against another to a level of confidence outlined in the testing practice to achieve the level of accuracy for each meter.

Typical instrumentation programs for annual certificate of approvals doesn’t truly yield a “verification” nor “calibration” since the flow meter is not being challenged against a know value of throughput.

manufacturers “flow tube simulators” only validate the electronics converter for display, outputs, and volumetric registration.  This does not prove the overall performance or accuracy statement of the meter being verified.

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