Throughout industry, flowmeter accuracy and repeatability are scrutinized with different criteria to ensure confidence in a particular application. In utility environments, for example, a government body may require a flowmeter to meet minimum accuracy and repeatability standards. In others, say private industry for example, in-house specifications are likely the source for accuracy and repeatability standards. Whatever the case, be it a government-mandated standard or an internal performance requirement, flowmeter accuracy and repeatability are of the utmost importance.

There are a variety of methods users can employ in an effort to ensure flowmeter performance, but the terminology for describing such practices is often used interchangeably despite the unique nature of different practices. In some applications, flowmeter verification will satisfy requirements for meter performance within a defined tolerance of the original manufactured state. In other applications, however, a traceable calibration is required to fulfill this requirement. And some other scenarios may require in-field proving of the meter to instill confidence in its performance in a specific system. These techniques, which are the most prominent methods for ensuring flowmeter accuracy and repeatability, have inherent differences and can be a good fit in many environments, depending on the requirements of the application.