Tolerance Of Probe Length; Surface Roughness Of Alloyc-Coated Flanges; Shortening Probes - Endress+Hauser Levelflex FMP51 Modbus Technical Information

Tolerance of probe length

Surface roughness of AlloyC-
coated flanges

Shortening probes

56
Over [m (ft)]
Up to [m (ft)]
Admissible tolerance [mm
(in)]
Over [m (ft)]
Up to [m (ft)]
Admissible tolerance [mm
(in)]
Ra = 3.2 μm; lower surface roughness levels are available on request.
This value is valid for flanges with "AlloyC>316/316L"; see product structure, feature 100 "Process
connection". For other flanges the surface roughness matches the corresponding flange standard.
If necessary, probes can be shortened. When doing so, the following must be observed:
Shortening rod probes
Rod probes must be shortened if the distance to the container floor or outlet cone is less than
10 mm (0.4 in). The rods of a rod probe are shortened by sawing at the bottom end.
Rod probes of FMP52 can not be shortened as they are coated.
Shortening rope probes
Rope probes must be shortened if the distance to the container floor or outlet cone is less than
150 mm (6 in).
Shortening coax probes
Coax probes must be shortened if the distance to the container floor or outlet cone is less than
10 mm (0.4 in).
Coax probes can be shortened max. 80 mm (3.2 in) from the end. They have centering units
inside, which fix the rod centrally in the pipe. The centerings are held with borders on the rod.
Shortening is possible up to approx. 10 mm (0.4 in) below the centering unit.
Rod and coax probes
— 1 (3,3)
1 (3,3) 3 (9,8)
-5 (-0,2) -10 (-0,39)
Rope probes
— 1 (3,3)
1 (3,3) 3 (9,8)
-10 (-0,39) -20 (-0,79)
Levelflex FMP51 Modbus
3 (9,8) 6 (20)
6 (20) —
-20 (-0,79) -30 (-1,18)
3 (9,8) 6 (20)
6 (20) —
-30 (-1,18) -40 (-1,57)
Endress+Hauser