Endress+Hauser Micropilot FMR50, Руководство по эксплуатации

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Micropilot FMR51, FMR52 HART Installation
Hauser 27
Nozzle diameter D Maximum nozzle height
H
max
Recommended antenna
1)
100 mm (4 in) 500 mm (19.7 in) BD: Horn 100mm/4"
150 mm (6 in) 800 mm (31.5 in) BD: Horn 100mm/4"
1) Feature 070 of the product structure
If the antenna doesn't extend below the nozzle, observe the following:
• The nozzle end must be smooth and free of burrs. If possible its edge should be
rounded.
• An interference echo suppression must be performed.
• Please contact Hauser for applications with higher nozzles than those
indicated in the table.
• For mounting in heigh nozzles the device is available in a version with an antenna
extension of up to 1 000 mm (39.4 in)
4)
• The antenna extension may cause interference echoes in the near range. In this
case it may occur that the maximum measurable level is reduced.
Threaded connection
For devices with a threaded connection it may be necessary - depending on the
antenna size - to unmount the horn before fastening the device and to mount it again
afterwards.
• Tighten with the hexagonal nut only.
• Tool : 55 mm hexagonal wrench
• Maximum permissible torque: 60 Nm (44 lbf ft)
6.4.2 Mesurement 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)
4) Feature 610 "Accessory mounted" of the product structure.