Proline Promass 83 FOUNDATION Fieldbus
10 Technical data
Hauser
101
Pressure loss
Pressure loss depends on the fluid properties and on its flow rate.
The following formulas can be used to approximately calculate the pressure loss:
Pressure loss formulas for Promass F, M and E
Pressure loss formulas for Promass A, H and I
Reynolds number
Re
≥
2300
1)
Re < 2300
∆
p = pressure loss [mbar]
υ
= kinematic viscosity [m
2
/s]
= mass flow [kg/s]
ρ
= fluid density [kg/m
3
]
d = inside diameter of measuring tubes [m]
K...K2 = constants (depending on nominal diameter)
1)
To compute the pressure loss for gases, always use the formula for Re
≥
2300.
Reynolds number
Re
≥
2300
1)
Re < 2300
∆
p = pressure loss [mbar]
υ
= kinematic viscosity [m
2
/s]
= mass flow [kg/s]
ρ
= fluid density [kg/m
3
]
d = inside diameter of measuring tubes [m]
K...K3 = constants (depending on nominal diameter)
1)
To compute the pressure loss for gases, always use the formula for Re
≥
2300.
Re
2 m
·
⋅
π
d
υ ρ
⋅ ⋅ ⋅
--------------------------
=
∆
p
K
υ
0.25
m
·
1.85
ρ
0.86
–
⋅
⋅
⋅
=
∆
p
K1
υ
m
·
K2
υ
⋅
0.25
m
·
2
⋅
ρ
------------------------------------
+
⋅ ⋅
=
m
·
Re
4 m
·
⋅
π
d
υ ρ
⋅ ⋅ ⋅
--------------------------
=
∆
p
K
υ
0.25
m
·
1.75
ρ
0.75
–
K3 m
·
2
⋅
ρ
-------------------
+
⋅
⋅
⋅
=
∆
p
K1
υ
m
·
K3 m
·
2
⋅
ρ
-------------------
+
⋅ ⋅
=
m
·
Summary of Contents for Proline Promass 83
Page 24: ...3 Installation Proline Promass 83 FOUNDATION Fieldbus 24 Endress Hauser ...
Page 34: ...4 Wiring Proline Promass 83 FOUNDATION Fieldbus 34 Endress Hauser ...
Page 64: ...6 Commissioning Proline Promass 83 FOUNDATION Fieldbus 64 Endress Hauser ...
Page 66: ...7 Maintenance Proline Promass 83 FOUNDATION Fieldbus 66 Endress Hauser ...
Page 90: ...9 Trouble shooting Proline Promass 83 FOUNDATION Fieldbus 90 Endress Hauser ...
Page 116: ...Index Proline Promass 83 FOUNDATION Fieldbus 116 Endress Hauser ...
Page 118: ...www endress com worldwide BA065D 06 en 12 04 50098623 FM SGML 6 0 ...