Endress+Hauser Micropilot FMR50 - Installation in Stilling Well

Micropilot FMR50 HART Installation
Endress+Hauser 25
Suitable thickness of the tank ceiling:
Penetrated material PE PTFE PP Perspex
DK / ε
r
2.3 2.1 2.3 3.1
Optimum thickness
1)
3.8 mm (0.15 in) 4.0 mm (0.16 in) 3.8 mm (0.15 in) 3.3 mm (0.13 in)
1) Other possible values for the thickness are multiples of the values listed (e.g. for PE: 7,6 mm (0.3 in), 11,4 mm
(0.45 in)
6.4 Installation in stilling well
1
90°
A0016841
 7 Installation in stilling well
1 Marking for antenna alignment
• For horn antenna: Align the marking towards the slots of the stilling well.
• 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 →  27.
6.4.1 Recommendations for the stilling well
• Metal (no enamel coating; plastic on request).
• Constant diameter.
• Diameter of stilling well not larger than antenna diameter.
• 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.