RMG EC 24 - Equations used with the EC 21 temperature corrector and the EC 24 volume corrector

ANNEXES
...............................................................................................................................................................................................................
...............................................................................................................................................................................................................
Manual EC 24 · EN05 · 2015-02
29
Annexes
A Equations used with the EC 21 temperature corrector and
the EC 24 volume corrector
Symbol Unit Designation
q
m
= m
3
/h Flow rate at measurement conditions
f
v
= Hz Frequency of the volume transducer
K
V
= P/m
3
Meter factor
V
m
= m
3
Volume at measurement conditions
P
v
= 1 Volume pulse
KZ1 = m
3
/P Totalizer factor (for output contacts only)
q
b
= m
3
/h Flow rate at base conditions
V
b
= m
3
Volume at base conditions
C(p,t) = 1 Conversion factor
K
Z2
= m
3
/P Totalizer factor (for output contacts only)
p = bara, (Absolute) pressure at measurement conditions
(barg, kg/cm
2
)
p
b
= bara Pressure at base conditions
(barg, kg/cm
2
) (= 1.01325 bar absolute)
T = °C Temperature at measurement conditions
T
K
= K Temperature at measurement conditions in Kelvin
T
b
= K Temperature at base conditions (= 273.15 K)
K = 1 K coefficient
Z = 1 Compressibility factor at measurement conditions
Z
b
= 1 Compressibility factor at base conditions
Z and Z
b
are calculated in compliance with GERG-88 as per G9.