FIELD: measuring equipment.
SUBSTANCE: invention relates to flow meter checking device and method. Flow meter calibration device comprises flow tube; located in flow tube displacer with multiple seals; fluid line communicated with flow tube via fluid medium; pumping mechanism communicated with fluid line via fluid medium to create pressure difference between flow tube volume surrounding displacer, and volume limited by displacer seals; and pressure indicator, communicated with fluid line via fluid medium to indicate pressure of fluid medium contained in volume limited by displacer seals. Method of flow meter checking, which includes: initiation of pumping mechanism connected with fluid medium line, wherein said fluid medium line is connected with flow meter calibration device flow tube via fluid medium; and detection of pressure difference between volume limited by located in flow tube displacer multiple seals, and flow tube volume surrounding displacer, in response to pumping mechanism action.
EFFECT: higher accuracy of calibration.
13 cl, 16 dwg
