RMG TME400, Operating Manual

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4 Operation
MANUAL TME400-VCF · EN08 · July, 01 st 2021
61
4.3. Equations in the TME400
The TME400 enables calculation of different values from the measured data and in
the data entered in the TME400. For a better understanding, some variables and for-
mula in this chapter are presented in advance; other equations and definitions of pa-
rameters are found in the
chapter 4.3.3. Coordinates in context.
4.3.1. Variable description
Formula symbol Units Name
q
m
m³/h Operating volume flow at
measurement conditions
f
V
Hz Frequency of the volume
transmitter
K
V
I/m³ Meter factor
V
m
m 3 Operating volume at
measurement conditions
P
V
Nondimensional (1) Volume pulse
K
Z1
m 3 /I Meter factor
(only for output contacts)
q
n
m 3 /h Standard volume flow at normalized
condition
Vn
m 3 Standard volume at normalized
condition
Zu(p, T)
Nondimensional (1) Conversion factor
K
Z2
m 3 /I Meter factor
(only for output contacts)
p
bara, (barg, kg/cm
2
) Measured pressure (absolute)
p
n
bara, (barg, kg/cm
2
) Pressure in standard state
(=1.01325 bar absolute)
T
°C Measuring temperature
T
K
K Measuring temperature in Kelvin
T
n
K Temperature in standard state
(= 273.15 K)
K
Nondimensional (1) Compression factor
Z
Nondimensional (1) Real gas factor
Z
n
Nondimensional (1) Real gas factor in standard state
(calculation for
Z
and
Z
n
takes place
according to GERG-88 in
accordance with G9)