Endress+Hauser Proline Promass F 200 FOUNDATION Fieldbus Operating Instructions Manual page 118

Technical data
Operable flow range
Input signal
118
Measuring ranges for gases
The full scale values depend on the density of the gas and can be calculated with the
formula below:
 =  · ρ : x
max(G) max(F) G
 Maximum full scale value for gas [kg/h]
max(G)
 Maximum full scale value for liquid [kg/h]
max(F)
 <  
max(G) max(F)
ρ Gas density in [kg/m³] at operating conditions
G
[mm]
8
15
25
40
50
80
Calculation example for gas
• Sensor: Promass F, DN 50
• Gas: Air with a density of 60.3 kg/m³ (at 20 °C and 50 bar)
• Measuring range (liquid):70 000 kg/h
• x = 90 kg/m³ (for Promass F, DN 50)
Maximum possible full scale value:
 =  · ρ : x = 70 000 kg/h · 60.3 kg/m³ : 90 kg/m³ = 46 900 kg/h
max(G) max(F) G
Recommended measuring range
"Flow limit" section (→  130)
Over 1000 : 1.
Flow rates above the preset full scale value are not overridden by the electronics unit, with
the result that the totalizer values are registered correctly.
External measured values
To increase the accuracy of certain measured variables or to calculate the corrected volume
flow for gases, the automation system can continuously write the operating pressure to the
measuring device. Endress+Hauser recommends the use of a pressure transmitter for
absolute pressure, e.g. Cerabar M or Cerabar S.
Various pressure transmitters and temperature measuring devices can be ordered
from Endress+Hauser: see "Accessories" section (→  116)
It is recommended to read in external measured values to calculate the following measured
variables:
• Mass flow
• Corrected volume flow
Proline Promass F 200 FOUNDATION Fieldbus
can never be greater than 
max(G)
DN
[in]
³⁄₈
½
1
1½
2
3
max(F)
x
[kg/m
60
80
90
90
90
110
Endress+Hauser
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