API MPMS 6.2 pdf download.Manual of Petroleum Measurement Standards Chapter 6—Metering Assemblies 5.1 DISPLACEMENT METERS Displacement meters (API MPMS Ch. 5.2) will require some form of signal output, either mechanical or electronic. Note that whenever a meter with a manual calibrator mounted below the pulser is retrofitted with an electronic pulse output device, the calibrator must be removed. Displacement meters...