Endress+Hauser Levelflex FMP51 Operating Instructions Manual page 41

Levelflex FMP51, FMP52, FMP54 PROFIBUS PA
Endress+Hauser
Replacing a displacer system in an existing displacer chamber
FMP51 and FMP54 are a perfect replacement for a conventional displacer system in an
existing displacer chamber. Flanges that suit Fisher and Masoneilan displacer chambers
are available for this purpose (special product for FMP51; feature 100 of the product
structure, options LNJ, LPJ, LQJ for FMP54). Thanks to menu-guided local operation,
commissioning the Levelflex only takes a few minutes. Replacement is also possible when
partially filled, and wet calibration is not required.
Your benefits:
• No moving parts, therefore zero-maintenance operation.
• Not affected by process influences such as temperature, density, turbulence and
vibrations.
• The rod probes can be easily shortened or replaced. Therefore, the probe can also be
easily adjusted on site.
1 Flange of the displacer chamber
Planning instructions:
• In normal cases, use a rod probe. When installing into a metal displacer chamber up to
150 mm, you have all the advantages of a coax probe.
• Contact between the probe and the side wall must be avoided. Where necessary, use a
centering disk or centering star at the bottom end of the probe.
• The centering disk or centering star must be adapted as accurately as possible to the
internal diameter of the displacer chamber to also ensure correct operation around the
probe end.
Additional information regarding interface measurement
• In the case of oil and water, the centering star should be positioned at the lower edge of
the lower outlet (water level).
• There should not be any changes in the diameter of the pipe. Use the coax probe if
necessary.
• It must be ensured that rod probes do not come into contact with the wall. Where
necessary, use a centering star at the end of the probe.
• The non-metal centering stars made of PEEK or PFA are recommended for interface
measurements. When using metal centering disks, it is important to ensure that the
lower medium covers the centering disk at all times. Otherwise, incorrect interface
measurements can result.
1
Mounting
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