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Orientation
Installation instructions
Pipes
Insertion depth
38
Installation
As a prerequisite for correct flow measurement, thermal measuring devices require a fully developed
flow profile. For this reason, please pay attention to the following points and document sections
when installing the device:
• Avoid flow disturbances, as the thermal measuring principle reacts sensitively to them.
• Give priority to dry gases.
• Take measures to avoid or remove condensation (e.g. condensation trap, thermal insulation etc.).
The direction of flow must match the direction of the arrow on the sensor. In the case of the
bidirectional sensor, the arrow points in the positive direction. When performing bidirectional
measurement, the sensing element must be installed with an accuracy of 3°.
Vertical orientation
Horizontal orientation,
transmitter head up
Horizontal orientation,
transmitter head down
Horizontal orientation,
transmitter head at side
Inclined orientation,
transmitter head down
1)
In the case of saturated or impure gases, vertical orientation is preferred in order to minimize
condensation or contamination. For bidirectional sensors, select horizontal orientation.
2)
Select inclined orientation (α = approx. 135°) for very wet or water-saturated gas (e.g. digester gas,
undried compressed air), or if deposits or condensate are constantly present.
For mechanical reasons and to protect the pipe, support is recommended for heavy sensors (e.g.
when installing a hot tap).
The measuring device must be professionally installed, and the following points must be
observed:
• Weld pipes professionally.
• Use seals of the correct size.
• Align flanges and seals correctly.
• Remove protection cap from sensing element.
• Following installation, the pipe must be free from dirt and particles in order to avoid damage to
the sensors.
• For further information → ISO standard 14511.
The minimum length of the insertion version can be determined using the Endress+Hauser
Applicator program or with the calculation formula below. The calculated necessary insertion depth
must be within the adjusting range of the selected insertion version.
Orientation
Proline t-mass I 500
Recommendation
1)
A0015591
A0015589
2)
A0015590
A0015592
2)
A0015773
Endress+Hauser
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