Installation
Micropilot M FMR250 FOUNDATION Fieldbus
18
Hauser
Measuring conditions
• The measuring range begins, where the beam hits the bottom. Particularly with conical outlets
the level cannot be detected below this point. The maximum measuring range can be increased
in such applications by using a top target positioner (
→
ä
16).
• In case of media with a low dielectric constant (groups A and B), the 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 bottom (see Fig.).
• In principle it is possible to measure up to the tip of the antenna with the FMR250. However, due
to considerations regarding abrasion and build-up and depending on the orientation of the
product surface (angel of repose), the end of the measuring range should be at a distance of
A
(see Fig.). If required, and if some conditions (high DC value, flat angle of repose) are met, shorter
distances can be achieved.
L00-FMR250xx-17-00-00-en-001
A [mm (in)]
C [mm (in)]
approx. 400 (15.7)
50...150 (1.97...5.91)
100%
0%
A
C
Measur
ing r
ange
