Methods for calibrating intelligent differential pressure transmitters in the laboratory
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There are pressure calibration instruments available on the market; in the past, compression devices, pressure gauges, output display units were used in combination with differential pressure transmitters. Which method is the best? Can the accuracy of pressure calibration instruments meet the requirements of intelligent differential pressure transmitters? If a single gauge is used for the connection, what should be the appropriate accuracy level for the digital display gauge, and what should be the accuracy level of the input pressure gauge?
Can the accuracy of the pressure calibrator meet the requirements of intelligent differential pressure transmitters?... It seems not; the accuracy of intelligent differential pressure transmitters is 0.075, while that of precision pressure gauges is 0.5. In fact, an accuracy level of 0.1 would already be quite accurate. As you asked whether this is suitable, it definitely isn’t. The accuracy of modern intelligent differential pressure transmitters is simply too high. Haha
It can be calibrated using Fluke’s process calibration tools. Fluke pressure calibrators typically have an accuracy of 0.025%; the F744 model also features Hart protocol support. Together with a pressure testing device, it can be used to calibrate smart transmitters (HART protocol), and can serve as a replacement for the Rosemount 375 handheld communicator. I work for Fluke. Fluke’s products are a bit expensive; you can get in touch with me at long.li@fluke.com