Standard fluid pressures - Implementation of measurements

The principles, technologies and main characteristics of mechanical pressure gauges, sensors and transducers, instruments used alone or as components of transmission assemblies (transmitters and networks), have been presented successively in previous articles [R 2 040v2][R 2 041v2][R 2 042v2] .

In this fourth and final article, the focus is on interpreting the results of the measurement chain: the instrument, however sophisticated and accurate, interacts with the other elements in the chain. Particular attention must therefore be paid to the design and implementation of the assembly. The associated parameters, defined on the basis of a mechanical model, ensure that the installation measures exactly what is required. Different stages in the design of a measurement chain can thus be proposed, based on instruments that are not only adapted to the environment and the application, but also to the type of transmission required. The use of equipment subject to standards or regulatory constraints is also addressed. Solutions for protection against certain harmful effects of the environment and measurement range are presented. Finally, some examples are given of how to interpret the results.