DTT31, DTT35
8 Endress+Hauser
Operating conditions: Installation instructions
Installation instructions
• Electrical rotation of display by 180°
• Housing can be rotated up to 310 ° mechanically
Orientation
No restrictions, but self draining.
Inlet and outlet run
The sensor requires a fully developed flow profile for correct monitoring. For this reason, steadying sections
(5x DN) must be provided in the pipe after a pump, pipe bend, internal fittings and cross-sectional changes.
• The sensor tip should be completely surrounded by medium.
• Position the sensor tip in the area of maximum fluid velocity
(pipe center).
• Minimum sensor immersion length: L
i
≥10 mm (0.4 in)
A0007163
Installation conditions
Orientation
• For horizontal pipes: lateral installation.
!
Note!
Installation from above only if the pipe is completely filled
with medium.
• For vertical pipes: installation in the ascending pipeline.
• DTT35: min. 3° inclination, because of self draining.
A0006977
Correct orientation
"
Caution!
• Do not install in down pipes open towards the end.
• The sensor tip should never touch the pipe wall.
A0006978
Incorrect installation!
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