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Title: Testing Flow Recorders Under Operating Conditions
Author: Bruce J. Caldwell
Source: 1969 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1969
Abstract: My approach to this topic entails some criticism of conventional gas measurement practice, I shall attempt to show that many measurement errors stem from poor instrument calibration techniques, and then attempt to offer substitute methods which I feel will add to accuracy in the field of gas measurements. It is timely that we should first differentiate between testing flow meters under flow conditions and under operating conditions. In the first instance it is quite unlikely that satisfactory test results could be obtained under flowing conditions. It follows that static pressures are something less than static in operating practice and differential pressures are seldom characterized by lack of movement. Therefore, any attempt to precisely measure and compare readings against a reference standard must be undertaken under conducive circumstances. If meaningful resolutions are to be expected, pressures must be gaged under truly static conditions.

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