Dears
We carried out the dry calibration factory test of 3418, 8 path 24 inch ultrasonic flow meter and attached are the results of its zero flow verification by individual paths. As per AGA 9 2022, section 4.6.3, the individual path gas velocity shall not be greater than 0.02 ft/sec. Here as can be seen that two paths are outside this limit. What can be done when we have a situation like this?