Levelflex M FMP40 and FMP45 Installation
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3.4 Installation
3.4.1 General instructions for interface measurement
For the measurement of the interface level, the coaxial probe, the rod or rope probe may be used.
However, rope and rod probes may be used in bypass resp. stilling well only. Rope probes should be
used in exceptions only, e.g. if the measurement range extends for more than 4 meters or the
available space above the tank is too limited to introduce rod probes.
The following constraints for the Levelflex Interface Version have to be considered:
• The overall level has to be constant.
• The dielectric constant of the upper prodcut level has to be smaller than 10.
• The difference between the dielectric values of the two product levels should be 10 or bigger.
• The minimum product level of each product is 100mm.
!
Note!
If one of these conditions is not met, the interface level measurement is not possible!
3.4.2 Installation
• Coaxial probes may be mounted directly into the tank.
• Rope and Rod probes have to be mounted into a bypass or stilling well
• For the use of any probes into stilling wells it has to be made sure that the stilling well or bypass
is perforated in a way which allows the product level in the inner part of the stilling well to adjust
to the outer level.
• The diameter of the stilling well / bypass should not exceed DN150 / 6” and not be smaller than
DN 50 / 2”
For a bypass, the dimensions of the following diagram should be kept:
L00-FMP4xxxx-17-00-00-en-062
100 %
0%
recommendation min.
200 mm / 8
”
recommendation min.
200 mm / 8
”
50mm / 2” DN 150 mm / 6”<<
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