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RUSKA 2470
Users Manual
B-2
Nitrogen Density — SI Units (0 to 6.9 MPa)
To calculate the density of Nitrogen at pressures from 0.01 MPa gauge to 6.9 MPa, use the
following equation;
()
()
PxEmkgDENSITY 051347.1/
3
−=
where;
PRESSUREP =
in Pa absolute (if P is in gauge, convert it to Pa absolute by adding
barometric pressure, e.g.
101325 P +
)
Nitrogen Density — SI Units (6.9 MPa to 100 MPa)
To calculate the density of Nitrogen at pressures from 6.9 MPa gauge to 100 MPa, use the
following equation;
()
()( )
23
0.055087016.11573.6/ PPmkgDENSITY −+=
where;
PRESSUREP = in MPa absolute (if P is in gauge, convert it to MPa absolute by
adding barometric pressure, e.g.
101325 P + )
Zero Air Density — SI Units (0 MPa to 20.7 MPa)
To calculate the density of Zero Air at pressures to 20.7 MPa, use the following equation;
()
()
PxEmkgDESNSITY 0517.1/
3
−=
where;
PRESSUREP =
in Pa absolute (if P is in gauge, convert it to Pa absolute by adding
barometric pressure, e.g.
101325 P + )
Helium Density — SI Units (0 to 6.9 MPa)
To calculate the density of Nitrogen at pressures from 0.01 MPa gauge to 6.9 MPa, use the
following equation;
()
()
PxEmkgDENSITY 06585.1/
3
−=
where;
PRESSUREP =
in Pa absolute (if P is in gauge, convert it to Pa absolute by adding
barometric pressure, e.g.
101325 P + )
Helium Density — SI Units (6.9 MPa to 100 MPa)
To calculate the density of Nitrogen at pressures from 6.9 MPa gauge to 100 MPa, use the
following equation;
()
()
()
23
03886.3508.1013136.0/ PEPEmkgDENSITY −−+−=
where;
PRESSUREP = in MPa absolute (if P is in gauge, convert it to MPa absolute by
adding barometric pressure, e.g.
101325.0+P )