Endress+Hauser Micropilot FMR51 - Installation in Bypass; Recommendations for the Bypass Pipe

Installation Micropilot FMR51, FMR52 FOUNDATION Fieldbus
32 Endress+Hauser
6.6 Installation in bypass
1
2
2
90°
90°
A0019446
 9 Installation in bypass
1 Marking for antenna alignment
2 Tank connectors
• Alighn the marker perpendicular (90°) to the tank connectors.
• Measurements can be performed through an open full bore ball valve without any
problems.
• After mounting, the housing can be turned 350° in order to facilitate access to the
display and the terminal compartment →  34.
6.6.1 Recommendations for the bypass pipe
• Metal (no plastic or enamel coating).
• Constant diameter.
• Select horn antenna as big as possible. For intermediate sizes (e.g. 95 mm (3.5 in))
select next larger antenna and adapt it mechanically (for horn antennas).
• Diameter difference between horn antenna and inner diameter of the bypass as small as
possible.
• At any transition (i.e. when using a ball valve or mending pipe segments), no gap may be
created exceeding 1 mm (0.04 in).
•
In the area of the tank connections (~ ±20 cm (7.87 in)) a reduced accuracy of the
measurement has to be expected.