Endress+Hauser Proline Prosonic Flow I 400 Operating Instructions Manual page 28

Mounting procedure
28
2. Mark the center line on the measuring pipe at the mounting location.

3. Draw the length of the arc (b) at the mounting position of the sensor holder from the
center line out to one side. Base the arc length on approx. 1/12 of the circumference
of the measuring pipe. Mark the first drill hole (drill hole diameter:
81 to 82 mm (3.19 to 3.23 in)). Extend the center line beyond the hole to be drilled.
4. Cut the first drill hole using a plasma cutter, for example. Measure the wall thickness
of the measuring pipe, if not already known.

b
5. Determine the sensor distance and arc length →  25.
6. Use the arc length that was determined to correct the center line.

7. Project and draw the corrected center line onto the opposite side of the measuring
pipe (half of measuring pipe circumference).
Proline Prosonic Flow I 400 Modbus RS485
e
A0044951
A0044957
A0044958
Endress+Hauser