Endress+Hauser Proline t-mass A 150, Руководство по эксплуатации, Страница: 16 / 134

Installation Proline t-mass A 150 HART
16 Hauser
Requirement for pipework
The measuring device must be professionally installed, and the following points must
be observed:
• Piping must be professionally welded.
• Seals must be sized correctly.
• Flanges and seals must be correctly aligned.
• The internal pipe diameter on the inlet side must match the internal diameter of the
process connection ordered. The maximum permitted deviation between the internal
diameters is:
1 mm (0.04 in)
• Following installation, the pipe must be free from dirt and particles in order to avoid
damage to the sensors.
Further information → ISO standard 14511
A0005103
Correctly aligned flanges and seals
A0005105
A0005106
A0005104
Incorrectly sized seal Incorrectly aligned flanges and seals Internal diameter of pipe does not
correspond to internal diameter of process
connection ordered
Inlet and outlet runs
The thermal measuring principle is sensitive to disturbed flow conditions.
• As a general rule, the measuring device should always be installed as far away as
possible from any flow disturbances. For further information, please refer to → ISO
14511.
• If possible, the sensor should be installed upstream from valves, T-pieces, elbows etc. To
attain the specified level of accuracy of the measuring device, the below mentioned inlet
and outlet runs must be maintained at minimum. If there are several flow disturbances
present, the longest specified inlet run must be maintained.