Emerson Exchange 365

Tip #84: Use Signal Characterization in the DCS to Linearize Valve Installed Flow Characteristic

Signal characterization to linearize valve installed flow characteristic has a bad reputation due to some practical implementation problems. These problems can be addressed today by doing the characterization in the distributed control system (DCS), but the stigma remains. With pneumatic positioners, signal characterization was done by the use of a cam. Standard cams were based [...] Read the full text.

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