Endress+Hauser Prosonic M FMU40 Brief Operating Instructions page 8

Mounting
2.3.2 Installation in narrow shafts
In narrow shafts with strong interfe-
rence echoes, we recommend using an
ultrasound guide pipe (e.g. PE or PVC
wastewater pipe) with a minimum dia-
meter of 100 mm (3.94 in).
Make sure that the pipe is not soiled by
accumulated dirt. If necessary, clean
the pipe at regular intervals.
2.3.3 Installation conditions for flow measurements
• Install the Prosonic M at the inflow side, as close above the maximum water level H
possible (take into account the blocking distance BD).
• Position the Prosonic M in the middle of the channel or weir.
• Align the sensor membrane parallel to the water surface.
• Keep to the installation distance of the channel or weir.
• You can enter the "Flow to Level" linearisation curve ("Q/h curve") using operating program
FieldCare or manually via the on-site display.
Example: Khafagi-Venturi flume
Khafagi - Venturi - flume
8
inflow
BD
direction of flow
1 x b
0
b
0
Prosonic M FOUNDATION Fieldbus
ENDRESS+HAUSER ENDRESS+HAUSER ENDRESS+HAUSER ENDRESS+HAUSER
Prosonic M Prosonic M Prosonic M Prosonic M
venting
hole
L00-FMU4xxxx-17-00-00-en-010
L00-FMU4KAxx-17-00-00-en-003
Endress+Hauser
as
max
outflow