PROCESS AND DEVICE FOR GRAVIMETRIC TEST GAS PRODUCTION BY MEANS OF REWEIGHING

摘要

The invention relates to a process and device for gravimetric test gas production by means of reweighing. In order fully to automate test gas production it is proposed to weigh an evacuated gas container fitted with a controllable valve on a balance, to connect a gas supply to the valve via a controllable adjuster fitted to the balance, to open the controllable valve automatically, to fill the first test gas component. The quantity allowed in is automatically checked by weighing, and after the required quantity has been filled the controllable valve is closed, the connection between the gas supply and the controllable valve is released by means of the adjuster, the gas supply is separated from the balance automatically and the gas container reweighed. These steps are suitably repeated for each test gas component to be fed into the gas container.