FIELD: control systems.
SUBSTANCE: presented group of inventions relates to an apparatus for fluid level loop control. Said control apparatus comprises a comparator to determine if a first pressure output corresponding to a volume of liquid in a tank is within a specified range of deviation from a second pressure output corresponding to the volume of liquid in the tank to determine an operational state of a turbine flow meter, wherein the first pressure output is being transmitted from a pressure sensor in the tank, and the second pressure output corresponding to an output from the turbine flow meter; and an interface to transmit a diagnostic message indicating that the turbine flow meter needs to be serviced based on the operational state of the turbine flow meter, wherein the comparator is to determine a maximum opening for the valve member based on the volume of the liquid, and the actuator driver is to instruct the electric actuator to adjust a flow rate adjuster to the determined maximum opening of the valve member, wherein the comparator is to determine a length of time to open the dump valve based on the volume of the liquid and a pressure of a gas in the tank. Said apparatus has two more embodiments, as well as implements a row of methods for fluid level loop control.
EFFECT: presented group of inventions reduces probability of repair of a separator and provides more reliable determination of threshold levels.
19 cl, 8 dwg
