Patent ID: 6106144
Filing Date: 2000-08-22
Classification: B01F

Abstract:
A process for gravimetric production of test gas by means of reweighing, comprising the following sequential steps:a. weighing an evacuated gas container (2) on a scale (1);b. connecting a gas feed line (7) to a controllable valve (3) that is connected to the gas container (2) by means of a controllable adjustment element (9) that is connected to the scale (1);c. automatically opening the controllable valve (3);d. filling a first test gas component in the gas container with an amount automatically monitored by weighing the gas container (2) and, after a required amount of that gas is reached, closing the controllable valve (3);e. detaching the connection between gas feed line (7) and the controllable valve (3) by means of the adjustment element (9) and automatically detaching the gas feed line (7) from the scale (1);f. reweighing the gas container (2);g. repeating steps b. to f. for each subsequent test gas component put into the gas container (2).