Input; Measured Variable; Measuring Range - Endress+Hauser Prosonic T FMU30 Technical Information

Prosonic T FMU30

Measured variable

Measuring range

Endress+Hauser
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Input

The distance D between the sensor membrane and the product surface is measured, see also figure  ä 3.
Using the linearization function, the device uses D to calculate:
• Level L in any units
• Volume V in any units
• Flow Q across measuring weirs or open channels in any units
The measuring range is limited by the range of a sensor. The sensor range is, in turn, dependent on the
operating conditions. To estimate the actual range, proceed as follows (see also the calculation example in the
diagram):
1. Determine which of the influences shown in the following table are appropriate for your process.
2. Add the corresponding attenuation values.
3. From the total attenuation, use the diagram to calculate the range.
Fluid surface
Calm
Waves
Strong turbulence (e.g. stirrers)
Foaming
Bulk material surface
Hard, rough (e.g. rubble)
Soft (e.g. peat, dust-covered clinker)
Dust
No dust formation
Little dust formation
Heavy dust formation
Filling curtain in detection range
None
Small quantities
Large quantities
Temperature difference between
sensor and product surface
to 20 °C (68 °F)
to 40 °C (104 °F)
to 60 °C (140 °F)
Attenuation
0 dB
5 to 10 dB
10 to 20 dB
Please contact your Endress+Hauser sales representative.
Attenuation
40 dB
40 to 60 dB
Attenuation
0 dB
5 dB
5 to 20 dB
Attenuation
0 dB
5 to 10 dB
10 to 40 dB
Attenuation
0 dB
5 to 10 dB
10 to 15 dB
5