Burkert 8138 Mise En Service page 20

4 Mounting
20
Constructional requirements on the bypass pipe:
•
Material metal, smooth inner surface
•
In case of an extremely rough tube inner surface, use an inserted
tube (tube in tube) or a radar sensor with tube antenna
•
Flanges are welded to the tube according to the orientation of the
polarisation
•
Gap size with junctions ≤ 0.1 mm, for example, when using a ball
valve or intermediate flanges with single pipe sections
•
The antenna diameter of the sensor should correspond to the
inner diameter of the tube
•
Diameter should be constant over the complete length
LEVEL TRANSMITTER 8138 • 4 ... 20 mA/HART - two-wire