Endress+Hauser Proline Promass I 100 - Page 77

Proline Promass I 100 Modbus RS485 Technical data
Endress+Hauser 77
DN Measuring range full scale values 
min(F)
to 
max(F)
[mm] [in] [kg/h] [lb/min]
50 2 0 to 70 000 0 to 2 570
50 FB 2 FB 0 to 180 000 0 to 6 600
80 3 0 to 180 000 0 to 6 600
FB = Full bore
Measuring ranges for gases
The full scale values depend on the density of the gas and can be calculated with the
formula below:

max(G)
= 
max(F)
· ρ
G
: x

max(G)
Maximum full scale value for gas [kg/h]

max(F)
Maximum full scale value for liquid [kg/h]

max(G)
< 
max(F)

max(G)
can never be greater than 
max(F)
ρ
G
Gas density in [kg/m³] at operating conditions
DN x
[mm] [in] [kg/m
3
]
8 ³⁄₈ 60
15 ½ 80
15 FB ½ FB 90
25 1 90
25 FB 1 FB 90
40 1½ 90
40 FB 1½ FB 90
50 2 90
50 FB 2 FB 110
80 3 155
110
FB = Full bore
Calculation example for gas
• Sensor: Promass I, 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 I, DN 50)
Maximum possible full scale value:

max(G)
= 
max(F)
· ρ
G
: x = 70 000 kg/h · 60.3 kg/m³ : 90 kg/m³ = 46 900 kg/h
Recommended measuring range
"Flow limit" section (  86)
Operable flow range 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.