Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual page 94

Technical data
94
Measuring ranges for gases
The full scale values depend on the density of the gas.
Use the formula below to calculate the full scale values:
⋅ ρ
g = g
/ x [kg/m
max(G) max(F) (G)
g
= Max. full scale value for gas [kg/h]
max(G)
g
= Max. full scale value for liquid [kg/h]
max(F)
ρ
= Gas density in [kg/m
(G)
Here, g can never be greater than g
max(G)
Measuring ranges for gases (Promass F, M)
DN
[mm] [inch]
8 3/8"
15 ½"
25 1"
40 1½"
50 2"
80 3"
100 4"
150 6"
250 10"
Measuring ranges for gases (Promass A)
DN
[mm] [inch]
2 1/12"
4 1/8"
Calculation example for gas
• Device: Promass F, DN 50
• Gas: air with a density of 60.3 kg/m
• Measuring range: 70000 kg/h
• x = 90 (for Promass F DN 50)
Max. possible full scale value:
· ρ
g = g
÷ x [kg/m³] = 70000 kg/h · 60.3 kg/m³ ÷ 90 kg/m³ = 46900 kg/h
max(G) max(F) (G)
Recommended full scale values
→ ä 107 "Limiting flow"
3
]
3
] for process conditions
max(F)
3
(at 20 °C and 50 bar)
Proline Promass 84 MODBUS RS485
x
60
80
90
90
90
110
130
200
200
x
32
32
Endress+Hauser