1. Start the vacuum selaomh performance tester and adjust the pressure into 0kPa, then open the transparent pressure vessel, do not open the inner bag seal, sink into the water and cover the lid;
2. Use vacuum selaomh performance tester reduce pressure to 90kPa, then fully sealed and maintain 30s, if the bag swell as a ball and no bubbles, it prove that the sealing of inner bag is qualified.
