Labom CI4 Series Operating Instructions Manual page 10

6.1.4 Calculating the fill weight
If a fill volume is available, the device calcu-
lates the fill weight from it using the density.
The fill volume and weight are proportional
to each other.
The level zero is also the reference point for
the fill weight.
6.1.5 Summary of the parameterisation concept
1. The fill height is calculated from the measured pressure using the density and height
offset.
2. The fill volume is calculated from the height using the tank shape table.
3. The fill weight is calculated from the volume using the density.
4. A manual selection determines which of these measurands should be issued at the
current output.
5. The current output is scaled using the parameters "Value at 4 mA" and "Value at 20
mA".
density
height
offset
tank
shape
density
BA_078 Rev 1F6 Level transmitter PASCAL Ci4 LEVEL
p pressure
ℎ= /( ∙ )-ℎ
h fill height
V
h
0
0
V
fill volume
= ∙
m
fill weight
Figure 11: Schematic diagram of the fill level measurement
V fill volume
m
fill weight
Figure 10: Calculating the fill weight from the fill vol-
h / V / m
W
20mA
W
4mA
4 mA 20 mA
I current
= ∙
ume
measurand
selector
value at
20 mA
value at
I
4 mA
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