METHOD OF CALIBRATING PRESSURE GAUGES OF TIGHTNESS CONTROL Russian patent published in 2020 - IPC G01M3/00 

FIELD: control means.

SUBSTANCE: invention relates to the field of dynamic calibration methods of automatic tightness control devices, in particular manometric instruments based on the test pressure change recording. Disclosed is a method of calibrating pressure gauges, based on the principle of flow of air from a closed measurement chamber, in which a reference sealed article is placed and to which a measuring manometer is connected, which records change in test pressure, into atmosphere, wherein air flow passage from measuring chamber to atmosphere is created through active resistance, having linear dependence of flow from pressure drop and based on frequency principle of molecules transfer from larger potential to smaller, which leads to change in test pressure to a reliable value equal to the dividing value of the measuring pressure gauge corresponding to the total number of active resistance switching, and one switching cycle is equal to the permissible measurement error.

EFFECT: providing small pressure changes independent of ambient parameters (temperature, barometric pressure, humidity).

1 cl, 2 dwg