Endress+Hauser HART Proline t-mass I 300 - Page 24

Installation Proline t-mass I 300 HART
24 Endress+Hauser
%
DN
1086
4
2
0
0
1
2
3
4
5
A
B
1
2
3
4
A0039508
 12 The additional measured error to be expected with flow conditioners depending on the disturbance type
and inlet run
A Additional measured error (%)
B Inlet runs upstream of the flow conditioner (DN)
1 2 × 90 ° elbow, 3-dimensional
2 Expansion
3 2 × 90° elbow
4 Reduction or 90° elbow
The pressure loss for flow conditioners is calculated as follows: ∆ p [mbar] = 0.0085 ⋅ ρ
[kg/m
3
] ⋅ v
2
[m/s]
Example of air
p = 10 bar abs.
t = 25 °C → ρ = 11.71 kg/m
3
v = 10 m/s
∆ p = 0.0085 ⋅ 11.71 ⋅ 10
2
= 9.95 mbar
ρ : density of the process medium
v: average flow velocity
abs. = absolute
Outlet runs with pressure measuring points
Install the pressure measuring point downstream of the measuring system. This prevents
the pressure transmitter from potentially affecting the flow in the measuring point.