Endress+Hauser Micropilot M FMR231, Operating Instructions Manual

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Micropilot M FMR231 with FOUNDATION Fieldbus Trouble-shooting
Hauser 79
9.4 Orientation of the Micropilot
For orientation a marker is found on the flange or threaded boss of the Micropilot. During
installation this must be oriented as follows (see Page 10):
• In tanks: to the vessel wall
• In stilling wells: to the slots
• In bypass pipes: vertical to the tank connectors
After commissioning the Micropilot, the echo quality indicates whether a sufficiently large
measuring signal is obtained. If necessary, the quality can be optimised later. Vice versa, the
presence of an interference echo can be used to minimise this by optimum orientation. The
advantage of this is that the subsequent tank mapping uses a somewhat lower level that causes an
increase in the strength of the measuring signal.
Proceed as follows:
#
Warning!
Subsequent alignment can lead to personal injury. Before you unscrew or loosen the process
connection, make sure that the vessel is not under pressure and does not contain any injurious
substances.
1. It is best to empty the container so that the bottom is just covered. However, alignment can be
carried out even if the vessel is empty.
2. Optimisation is best carried out with the aid of the envelope graph in the display or the
ToF Tool.
3. Unscrew the flange or loosen the threaded boss by a half a turn.
4. Turn the flange by one hole or screw the threaded boss by one eighth of a turn. Note the echo
quality.
5. Continue to turn until 360° is reached.
6. Optimum alignment:
L00-FMRxxxxx-19-00-00-en-002
Fig. 4: Vessel partly full, no interference echo obtained
L00-FMRxxxxx-19-00-00-en-003
Fig. 5: Vessel partly full, interference echo obtained: