Micropilot M
8
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 FMR240 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
•
In principle it is possible to measure up to the tip of the antenna. However, due to considerations
regarding corrosion and build-up, the end of the measuring range should not be chosen any
closer than 50 mm (2”) to the tip of the antenna.
•
The smallest possible measuring range (B) depends on the antenna version.
•
The tank diameter should be greater than (D), the tank height at least (H).
•
Depending on its consistence, foam can either absorb microwaves or reflect them off the foam
surface. Measurement is possible under certain conditions.
B [m / inch]
C [mm / inch]
D [m / inch]
H [m / ft]
FMR 230 / 231
> 0.5 / > 20
150…300 / 6…12
> 1 / > 40
> 1.5 / > 5
FMR 240
> 0.2 / > 8
50…150 / 2…6
> 0.2 / > 8
> 0.3 / > 1
L00-F
M
R2xxxx
-17
-00
-0
0-en-005
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AoteWell International.inc
Tel: +852-6563-2160
