Endress+Hauser Prosonic T FMU30 - Page 12

Installation Prosonic T
12 Endress+Hauser
3.3.2 Installation in narrow shafts
3.3.3 Installation conditions for flow measurements
• Install the device at the inflow side (B), as close above the maximum water level H
max
as possible
(take into account the blocking distance BD).
• Position the instrument 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.
Example: Khafagi-Venturi flume
A0019607
A Khafagi-Venturi flume BD Blocking distance
B Inflow E Empty calibration
C Outflow F Full calibration
V Direction of flow
In narrow shafts with strong interference
echoes, we recommend using an ultrasound
guide pipe (e.g. PE or PVC wastewater pipe)
with a minimum diameter of 100 mm (3.94 in).
Make sure that the pipe is not soiled by accumu-
lated dirt. If necessary, clean the pipe at regular
intervals.
L00-FMU30xxx-17-00-00-xx-010
1 Venting hole
1
1 x b
0
b
0
BD
A
E
BC
V
H
max
=F