User's Manual

Table Of Contents
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Micropilot FMR51, FMR52
42 V. 1, Rev. 8, 4-10-2012 Endress+Hauser
Threaded connection
Tighten with the hexagonal nut only.
Tool : Hexagonal wrench 55 mm
Maximum permissible torque: 60 Nm (44 lbf ft)
Mesurement from the outside through plastic walls
If possible, use an antenna 100 mm (4").
The distance from the lower edge of the antenna to the tank ceiling should be about 100 mm (4 in).
If possible, avoid mounting locations where condensation or build-up might occur.
In case of outdoor mounting, the space between antenna and vessel has to be protected from the
elements.
Do not mount any potential reflectors (e.g. pipes) outside the tank in the signal beam.
Suitable thickness of the tank ceiling:
Penetrated material PE PTFE PP Perspex
DK / e
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)