Ax350_04a_oi_e.doc / May-18
Seite 51 / 54
Application Example:
We like to display the filling quantity (volume) of a tank as shown below, with use of a pressure sensor
mounted to the bottom of the tank. With this application the analogue pressure signal is proportional
to the filling level, but not to the filling quantity.
P01_x
P10_x
P15_x
P16_x
Pressure
Sensor
0-20 mA
P0
1_
x
P1
0_
x
P1
6_
x
P01_y
P07_y
P15_y
P16_y
Pressure
Volume
P1
5_
x
P10_y
To solve the problem, we divide the non-linear part of the tank into 14 parts. We enter the expected
display values of the pressure sensor to registers P01_x to P15 _x.
For the linear part of the tank it is sufficient to store the final pressure value to register P16_x.
Now we can easily calculate the appropriate filling quantities and enter these values to the registers
P01_y to P16_y.
