Product Info

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Micropilot FMR50
Endress+Hauser V. 10, Rev. 2, 1-10-2019 43
Horn antenna with mounting bracket (FMR50)
A0016865
 21 Installation of the horn antenna with mounting bracket
Align the antenna vertically to the product surface using the mounting bracket.
NOTICE
The mounting bracket has no conductive connection to the transmitter housing.
Danger of electrostatic charge
‣
Connect the mounting bracket to the local potential equalization system.
Measurement from the outside through plastic walls (FMR50/FMR51)
• Dielectric constant of the medium: ε
r
> 10
• If possible, use an antenna 100 mm (4 in).
• 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 / 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)