CALIBRATING AND METERING DEVICE FOR A MIXTURE OF GASES

摘要

The invention is directed to an arrangement for generating and metering a gas mixture which includes controllable adjusting elements whereby the gas mixture is either conducted through a bypass line past a vaporizer unit to a consumer or is conducted through the vaporizer unit and from there to the consumer. With this arrangement, a calibration of the carrier gas metering especially at low flow quantities is obtained which is continuously reproducible and either carried out manually or automatically without interruption of the metering operation. This is achieved in that a calibrating line opens into a calibrating vessel upstream of the vaporizer unit and the calibrating vessel can be separated by way of shutoff valves from the vaporizer line and a level indicator is connected to the calibrating vessel.