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Split from logo 8 4-20ma pressure sensor and scale to kg.

With this height (7m) it seems to be a standing object, cylinder, quader or anything else. If you just want to know the height, then use example in attachment. If you also want to display the volume, then we need the exact dimensions of the tank.

Regards, Scorp

hello , thanks for answering .

the tank is round and its standing.

 i want to read the level of the liquid inside it.'

thank u

Scorp

With this height (7m) it seems to be a standing object, cylinder, quader or anything else. If you just want to know the height, then use example in attachment. If you also want to display the volume, then we need the exact dimensions of the tank.

Regards, Scorp

Yes, round and you want to measure liquid. Where are the exact dimensions of your tank, is it exactly a cylinder with the same diameter at each height ? The height you already have in my example, what do you want for liquid, Liter ?

Regards, Scorp

P.S. Explaining is difficult, if i don't know your basics. Do you understand the scaling of the example program ?

yes liter.

 for scaling  i just need how to convert the 4-20 mA  to signal . i know its through analog amplifier but the offset and gain i didn't get

You can see the scaling in my example. The easiest way is to select the appropriate sensor (4-20mA), then the Measurement Range, in your case e.g. 0...2000 with 3 decimal places in bar. You only need to change the analog input AI1 depend on your settings of the base module (0, 2 or 4 analog inputs) With 0 it stay on AI1, with 2 change to AI3 and with 4 change to AI5, if your analog module AM2 is the first analog module right of the base module.

The height is calculated with the arithmetic, just multpiplied with 10 in this case, because 0.7 bar will cause a value of 700 (0.700bar) x 10 = 7000mm

The volume in Liter you only can get, if you tell us the dimensions and the form exactly. Is it a uniform cylinder with your given width = diameter ?

Regards, Scorp

Thank you so much for your support .

and yes width = diameter = 1.8 meter

and 1 more thing , when i download the program , without connecting the sensor the  readings are -0.500 bars and the Hight is  -5000mm ?

shoudnt the pressure be 0 and hight be also 0

please refer to the attached photo

I have changed the program with additional Liter display. The negative values are okay without  sensor, because the sensor begins with 4mA / 0bar and without sensor it is 0mA / <0bar.

The program is presetted with 0 analog inputs on the base module, because you have a AC230V version without analog inputs. Therefore the first analog input of the AM2 module should be AI1. If you are asked for overwriting the AI settings, then click yes. Otherwise your analog input is numbered to AI3 or AI5 and on AI1 you don't get the value.

Regards, Scorp