Sensor Arrangement (Clamp-On) - Endress+Hauser Proline Prosonic Flow 90 Operating Instructions Manual

Proline Prosonic Flow 90
!
Endress+Hauser
3.2.7

Sensor arrangement (clamp-on)

The transmitter offers a number of options between 1 and 4 traverses for the type of installation.
Please note that the signal strength is reduced with each additional reflection point in the pipe.
(Example: 2 traverses = 1 reflection point)
To achieve the best signal quality possible, choose the least number of traverses required for a
sufficient transit time difference.
Fig. 10: Sensor arrangement (clamp-on)
1 = 1 traverse, 2 = 2 traverses, 4 = 4 traverses
Recommendations:
Due to their design and properties, the Prosonic Flow sensors are particularly suited to certain
nominal diameter ranges and pipe wall thicknesses. For this reason, various sensor types W, P and
U are offered for these different applications.
Recommendations for sensor installation can be found in the following table.
Sensor type
Prosonic Flow U
Prosonic Flow W
Prosonic Flow P
* see note below
Note!
• The installation of clamp-on sensors is principally recommended in the 2 traverse type of instal-
lation. This type of installation allows the easiest and most comfortable type of mounting and
means that a system can also be mounted even if the pipe can only be accessed from one side.
• If the pipe nominal diameter is small (DN 60 and smaller), the sensor spacing with Prosonic
Flow W/P can be too small for an installation with 2 traverses. In this case, the 4 traverse type of
installation must be used. In all other instances, the 2 traverse configuration is the preferred
method.
• The use of Prosonic Flow W/P sensors DN 100...4000 is principally recommended for pipes with
a wall thickness >4 mm, pipes made of composites such as GRP, pipes with lining and for
applications with media with high acoustic damping, even for nominal diameters < DN 100.
For these applications, we principally recommend mounting the W/P sensors with 1 traverse
configuration.
• In the DN 15...50 nominal diameter range, Prosonic Flow U is preferred for use on plastic pipes.
Both the Prosonic Flow W/P and the Prosonic Flow U sensor types can be used in the
DN 50...100 nominal diameter range. The use of Prosonic Flow W/P sensors is principally
recommended for applications as of DN 60.
• If the measuring device displays an insufficient signal strength, reduce the number of the
traverses.
1 2
Nominal diameter
DN 15...100
DN 50...60
DN 80...600
DN 650...4000
3 Installation
4
A0001108
Type of mounting
2 traverses
2 (or 4) traverses*
2 traverses
1 traverse
17