Chapter 3
Description
General Information
The RUSKA Gas Lubricated Piston Pressure Gauge, model 2470 is a pneumatic pressure standard designed for the accurate generation and measurement of gas pressures to 3000 psig. This measurement is accomplished in the basic manner of using the fundamental pressure equation PRESSURE = FORCE/AREA (see Chapter 2, General Piston Pressure Gauge Considerations, for more information). The gauge is used as the precision measuring device in the RUSKA Gas Lubricated Piston Pressure Gauge System.
It may be seen from the above general equation that when a known force produced by a known mass is applied to a piston of a known area, a pressure will be produced that may be calculated (see Appendix A for detailed information). The RUSKA gauge is arranged for the application of carefully determined masses on a piston of known area.
A key feature of the gauge is its ability to accurately reproduce its performance at the lower pressures. The low viscosity of the gas provides excellent lubrication for the
The nominal range of pressure (interval) over which the gauge is capable of operating is the span from 1.4 kPa (0.2 psig) to 20.6 MPa (3000 psig). This interval is covered by three interchangeable piston/cylinder assemblies having sufficient overlap for establishing continuity of measurement and for making detailed investigations of subintervals within the total range (span).
Some of the most important industrial uses of the gas lubricated piston pressure gauge is that of a standard for calibrating transducers,
