Endress+Hauser Profi Bus Levelflex M FMP40 - Page 36

6 Function group "linearisation" (04) Levelflex M
36 Endress+Hauser
horizontal cyl
The volume, mass etc. are calculated automatically in cylindrical horizontal tanks by entering the
"diameter vessel" (047), the "customer unit" (042) and the "max. scale" (046). The
"max. scale" (046) corresponds to an output of 100% (= 20 mA for HART).
manual
If the level is not proportional to the volume or weight within the set measuring range, you can enter
a linearisation table in order to measure in customer units. The requirements are as follows:
• The 32 (max.) value pairs for the linearisation curve points are known.
• The level values must be given in ascending order. The curve is monotonously increasing.
• The level heights for the first and last points on the linearisation curve correspond to empty and
full calibration respectively.
• The linearisation takes place in the basic setup unit ("distance unit" (0C5)).
Each point (2) in the table is described by a value pair: level (3) and, for example, volume (4). The
last value pair defines the 100% output (= 20 mA for HART).
100%
20
mA
0%
4
mA
kg, m
3
,ft
3
, ... = customer unit (042)
max.scale
(046)
diameter vessel (047)
100%
20
mA
0%
4
mA
(2)
(4)
(3)
kg, m
3
,ft
3
, ... = customer unit (042)