ANNEXES
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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.
