Helium Leak Testing
The requirement of leak testing is quantized by the maximum allowable leak rate. It can be of two types, 1) Pressure increase in a vacuum - reservoir or 2) Pressure decrease in pressure - tank.
The leak rate value is 1 mbar l/s, if in a vacuum-reservoir with a volume of one litre, the pressure rises in one second about one mbar or in a pressure-reservoir it drops about one mbar in one second.
Helium Leak Testing Graph :