Flow meters and accuracy
When determining accuracy, calibration is just a link in a chain of quality control measures governed by internationally recognised standards. Equally important are measurement uncertainty, traceability, accreditation and verification.
Measurement uncertainty: The most important quality criterion in any comparison between calibration facilities.
Traceability: An unbroken ‘chain’ of comparisons extending back from the device that is being tested to the testing equipment… and finally to the hierarchically highest national standard of a country.
Accreditation: The formal recognition of a body’s technical competence in performing specific services, such as calibration.
Verification: Confirmation that a flow meter is operating according to the manufacturer’s specifications.
- Calibration is accuracy’s best friend.
- All flow meters require periodic recalibration and verification.
- Calibration can be done in the lab, and more importantly, in the field.
Accuracy means ‘money’
Flow meters and calibration
Electricity+Control, July 2012 (pgs 34 – 36)