Why is calibration accuracy important?
Most manufacturers use a process known as wet calibration to test flow meters under good flow conditions on a flow rig. This process is critical in ensuring the flow meter delivers the best possible accuracy in everyday use. The resulting data is then used by the manufacturer to show that the flow meter has been calibrated for accurate measurement within the limits of its specification. In the majority of applications, where flow meters are used to give an indication of the rate at which a liquid or gas is moving through a pipeline, high accuracy is not a crucial factor. However, for processes such as in the food processing or chemical industries, flow meter accuracy is often the deciding factor between optimum product quality and wasted product potentially running into thousands of pounds. The problem is that no two manufacturers flow rigs are exactly the same. Consequently, it is impossible for them to guarantee to customers that their flow meters are calibrated under exactly the sam
