METHOD FOR CALIBRATION OF GAS FLOW METRE AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC G01F25/00 G01F1/86 

FIELD: physics, measurements.

SUBSTANCE: in process of calibration working gas supplied from calibrated flow metre 5 is used to displace liquid without direct contact from reservoir in the form of volumetric flask 6 with calibrated volumes 10, 11 and photoelectric detectors of liquid level 7, 8, 9 of calibrated volume. Using given formula, which includes difference between masses of working gas in the moments of liquid level passage through initial and final sections of calibrated volume and time gap between these moments, mass consumption of working gas is identified. Device for method realisation comprises separating tank 1 with drainage electromagnetic valve 2 and separating gas impermeable membrane 3. Lower part of volumetric flask is connected to expansion reservoir 12, in upper part of which barometre 13 and additional reservoir 14 are installed, and at the outlet to atmosphere - drainage electromagnet valve 15 is installed.

EFFECT: provides for possibility to perform calibration of gas flow metres in the field, without their dismantling off the test bench and other systems of working gas supply, and to identify mass flow of working gas with higher accuracy.

2 cl, 1 dwg