VERIFICATION AND CALIBRATION UNIT OF GAS METERS, FLOW METERS AND VOLUMETERS Russian patent published in 2014 - IPC G01F25/00 

FIELD: measurement equipment.

SUBSTANCE: verification and calibration unit of gas meters, flow meters and volumeters relates to measurement equipment, namely to calibration units on critical nozzles, and is intended for verification and calibration of meters, flow meters and volumeters of different types. The unit includes reference flow meters - critical nozzles 1, each of which is provided with shutoff valve 2, pump 3, receiver 4 (forechamber), control and monitoring system 5 containing control unit 6 of shutoff valves 2, unit 7 for shaping of a set of critical nozzles as per the specified value of flow rate of verification medium.

EFFECT: reduction of measurement error of volumetric flow rate of verification medium till value $$\frac{\delta n}{\sqrt{2}}\ge \delta ,$$ where δn - relative error of a nozzle.

2 cl, 2 dwg