Proline Prosonic Flow 91 Maintenance
Endress+Hauser 45
7 Maintenance
No special maintenance work is required.
7.1 Exterior cleaning
When cleaning the exterior of measuring devices, always use cleaning agents that do not attack the
surface of the housing and the seals.
7.2 Coupling fluid
A coupling fluid is required to ensure the acoustic link between the sensor and the piping. This is
applied to the sensor surface during commissioning. Periodic replacement of the coupling fluid is
usually not required.
!
Note!
If too much coupling fluid is applied, signal transmission is reduced by up to 10 dB.
a0005750
Fig. 33: Application of the coupling fluid
1 Coupling fluid
2 Sensor surface, Prosonic Flow W
2
1
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