Proline t-mass 65 PROFIBUS DP/PA
Installation
Hauser
15
4.2.5
Inlet and outlet runs
The thermal dispersion principle is sensitive to disturbed flow conditions.
As a general rule, the thermal flowmeter should always be installed as far away as possible
from any flow disturbances. For further information
ISO Standard 14511.
!
Note!
• Where two or more flow disturbances are located upstream of the meter, the longest indi-
cated inlet length should prevail. For example if a control valve is additionally mounted
upstream from the measuring device and an elbow on the inlet side, select the recom-
mended inlet length for control valves: 50 × DN
• For very light gases such as Helium and Hydrogen all upstream distances should be dou-
bled.
The minimum recommendations for inlet and outlet runs (without flow conditioner) are:
Flanged sensor
Insertion sensor
!
Note!
A specially designed perforated plate flow conditioner can be installed if it is not possible to
observe the inlet runs required (
1
A0007523
2
A0007524
3
A0007525
4
A0007526
5
A0007527
6
A0007528
1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow,
5 = 2 × 90° elbow (3-dimensional), 6 = Control valve
1
A0007529
2
A0007530
3
A0007531
4
A0007532
5
A0007564
6
A0007534
1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow,
5 = 2 × 90° elbow (3-dimensional), 6 = Control valve or pressure regulator
15 x DN
2 x DN
15 x DN
2 x DN
15 x DN
2 x DN
20 x DN
2 x DN
35 x DN
2 x DN
50 x DN
2 x DN
20 x DN
5 x DN
20 x DN
5 x DN
20 x DN
5 x DN
25 x DN
5 x DN
4
0 x DN
5 x DN
50 x DN
5 x DN
Содержание Proline t-mass 65 PROFIBUS DA
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