Apparatus for determining the flow characteristic of a volumetric flowmeter

摘要: A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder connected between inlet and outlet thereof. flow meter that produces flow-representative pulses is in line. rod to piston adapted travel through as barrier. The drives at predetermined, constant speed thereby determines rate calibration. sensed it travels during test run, while produced by are counted time interval which displaces given volume. preferably pressure null point. First second annular edge seals around periphery form an cavity into pressurized fluid, lubricant, injected. Before line, cylinder, induced, establishing closed loop lines cylinder. To initiate blocked operate piston. Simultaneously therewith, driven from end-to-end execute run.