Emerson Process management has introduced the DL8000 microprocessor-based batch delivery controller to meet increasingly high industry standards for accuracy and integrity. Preset controllers accurately set the amount of liquid to be delivered and loaded into a truck, railcar, or ship, and control the valves and pumps to load the liquid while monitoring critical circuits to ensure safe loading. These processes must all meet standards set by the American Petroleum Institute. The DL8000 calculates flow for custody transfer using average measured product flow rates, measured temperature, pressure, and density to achieve a measurement of flow at standard conditions. The DL8000 can be configured for different batch loading applications using ROCLINK(TM)800 software and is fully programmable for PLC tasks using FST (Function Sequence Tables) or any of the languages defined by IEC Standard 61131-3, including ladder logic, structured text, function block diagrams, instruction list, or sequential function chart language.
