9 Trouble-shooting
Micropilot S FMR 533
80
Hauser
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:
•
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
"
(056)
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:
a) Vessel partly full, no interference echo obtained:
b) Vessel partly full, interference echo obtained:
L
0
0
-F
M
Rxx
xxx-1
9
-0
0
-0
0
-e
n
-0
0
2
L00-F
M
Rx
x
x
x
x
-19-00-00-en-003