Mounting
Micropilot M FMR 240 with PROFIBUS PA
16
E Hauser
Measuring conditions
!
Note!
Please use FMR 230 respectively FMR 231 for boiling surfaces or in case of a
tendency for foaming. The maximum measuring range of the FMR244 may
decrease in case of heavy steam development, depending on density, temperature
and composition of the steam (
→
please use FMR 230 respectively FMR 231).
Please use FMR 230 in stilling well for the measurement of ammonia NH
3
.
•
The measuring range begins, where the beam hits the tank bottom. Particularly with
dish bottoms or conical outlets the level cannot be detected below this point.
•
In case of media with a low dielectric constant (groups A and B), the tank bottom can
be visible through the medium at low levels. In order to guarantee the required
accuracy in these cases, it is recommended to position the zero-point at a distance
C
above the tank bottom (see Fig.).
•
For FMR 240 the end of measuring range should not be chosen closer than
A
(see Fig.) to the tip of the antenna, especially if there is development of condensate.
•
The smallest possible measuring range
B
depends on the antenna version (see Fig.).
•
The tank diameter should be greater than
D
(see Fig.), the tank height at least
H
(see Fig.).
•
Depending on its consistence, foam can either absorb microwaves or reflect them off
the foam surface. Measurement is possible under certain conditions.
L00-FMR2xxxx-17-00-00-en-008
A [mm/inch]
B [m/inch]
C [mm/inch]
D [m/inch]
H [m/ft]
FMR 240
50 / 2
> 0,2 / > 8
50...150/2...6
> 0,2 / > 8
> 0,3 / > 1
100%
0%
B
A
C
H
Ø D
