FIELD: physics.
SUBSTANCE: proposed system comprises process control system, feed fluid source, controlled fluid source made up of tank, pressure regulator, first and second pressure transducers, first, second and third selectively activated solenoid valves. Process control system comprises controller and at least one process control device. Controlled fluid source features known constant volume and contains gas kept at preset pressure and communicated with aforesaid controller. First pressure transducer is connected with controlled fluid source while second transducer is connected with controller output.
EFFECT: higher accuracy of measurement.
19 cl, 10 dwg
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