Abstract
The article describes the implemented system of pneumatic lifting of the bell of the state primary standard gas volume and volume flow rate units. The system is composed of unified elements of industrial air preparation. There are elements for air purification in front of the compressor, dehumidifier, refrigerator dryer. With the use of a pneumatic system, the bell can be filled with prepared air with different values of excess pressure. The system is installed as a backup to the current to increase security. Pneumatic lifting of the bell allows you to connect a set of cylinders with pure inert gases or mixtures thereof to determine the impact on the gas meters metrological characteristics.
Highlights
When calibrating the reference gas meters, the bell is periodically raised with its filling with air and lowered with different speed
The lifting of the bell is carried out by means of a fan, which is controlled by the information-measuring system (IMS) of the primary standard
In order to increase the efficiency of calibration works and the stability of the reproduction gas volume and volume flow rate units and optimizing the filling and holding times the bell, it is proposed to implement a controlled pneumatic lifting of the bell
Summary
When calibrating the reference gas meters, the bell is periodically raised with its filling with air and lowered with different speed (reproduction gas volume flow rate unit). The lifting of the bell is carried out by means of a fan, which is controlled by the information-measuring system (IMS) of the primary standard.
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