Endress+Hauser Proline Prosonic Flow 90U Technical Information page 5

Proline Prosonic Flow 90U, 90W, 91W, 93C, 93U, 93W
Endress + Hauser
• If the pipe nominal diameter is small (DN 60 and smaller), the sensor spacing with Prosonic Flow W can be
too small for an installation with 2 traverses. In this case, the 1 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 sensors DN 100 to 4000 is principally recommended for plastic pipes with a
wall thickness > 10 mm, pipes made of composites such as GRP, pipes with lining, even for nominal
diameters < DN 100. This applies also to applications with media with high acoustic damping. For these
applications, we principally recommend mounting the W sensors with 1 traverse configuration.
• In the DN 15 to 50 nominal diameter range, Prosonic Flow U is preferred for use on plastic pipes. Both the
Prosonic Flow W and the Prosonic Flow U sensor types can be used in the DN 50 to 100 nominal diameter
range. The use of Prosonic Flow W 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.
Dual-channel measuring devices
Prosonic Flow 93 has two measuring channels which are independent of one another. In other words, the
transmitter supports the simultaneous operation of two sensor pairs at two individual measuring channels. In
doing so, the resources of the transmitter are split evenly between the two channels.
This ability of the transmitter can be used in many different ways:
• For dual-channel measurement
• For dual-path measurement
The transmitter can output the measured values of both channels either individually or arithmetically linked
(as total, difference or mean).
Dual-channel measurement
In the case of dual-channel measurement, the measured values of two independent measuring points are
determined and processed by one transmitter.
a Cable for power supply
b Signal cable (outputs)
If required, the measured values of measuring channel 1 and measuring channel 2 can be arithmetically linked
together. The following possibilities for outputting measured values are suitable for dual-channel measurement:
• Individual output of measured values from channel 1 and 2
• Total of measured values from channel 1 and 2
• Difference of measured values from channel 1 and 2
a
b
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