Installation Micropilot FMR51, FMR52 PROFIBUS PA
26 Endress+Hauser
• Diameter difference between horn antenna and inner diameter of the stilling well as small
as possible.
• Weld seam as smooth as possible and on the same axis as the slots.
• Slots offset 180° (not 90°).
• Slot width or diameter of holes max. 1/10 of pipe diameter, de-burred. Length and number
do not have any influence on the measurement.
• Select horn antenna as big as possible. For intermedaite sizes (e.g. 180 mm (7 in)) select
next larger antenna and adapt it mechanically (for horn antennas)
• At any transition (i.e. when using a ball valve or mending pipe segments), no gap may be
left exceeding 1 mm (0.04 in).
• The stilling well must be smooth on the inside (average roughness R
z
≤ 6.3 μm (248 μin)).
Use extruded or parallel welded metal pipe. An extension of the pipe is possible with welded
flanges or pipe sleeves. Flange and pipe have to be properly aligned at the inside.
• Do not weld through the pipe wall. The inside of the stilling well must remain smooth. In
case of unintentional welding through the pipe, the weld seam and any unevenness on the
inside need to be carefully removed and smoothened. Otherwise, strong interference echoes
will be generated and material build-up will be promoted.
• In the case of smaller nominal widths flanges must be welded to the pipe such that they
allow for a correct orientation (marker aligned toward slots).
6.6 Installation in bypass
A0019446
8 Installation in bypass
1 Marking for antenna alignment
2 Tank connectors
To Next Page
Loading...
