Fluke RUSKA 2470 - Manual (Page 70)

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;
( ) ( )
P x E m kg DENSITY 05 1347 . 1 / 3 − =
where;
PRESSURE P =
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;
( )
( ) ( )
2 3 0.055087 016 . 11 573 . 6 / P P m kg DENSITY − + =
where;
PRESSURE P =
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;
( ) ( )
P x E m kg DESNSITY 05 17 . 1 / 3 − =
where;
PRESSURE P = 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;
( ) ( )
P x E m kg DENSITY 06 585 . 1 / 3 − =
where;
PRESSURE P =
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;
( )
( )
( )
2 3 03 886 . 3 508 . 1 01 3136 . 0 / P E P E m kg DENSITY − − + − =
where;
PRESSURE P = in MPa absolute (if P is in gauge, convert it to MPa absolute by
adding barometric pressure, e.g. 101325 . 0 + P )