I had already talked about this type of application in another thread I had opened, but I decided to create a new one because I have an INA118 available.
I've a load cell that gives [2m .. 24m]V for [0 .. 500]kg of weight, and I want a [0 .. 5]V output using INA118.

Since Vo = [306m ... 4.875]V I decided to apply about 200mV of offset to get 5V (when there is 24mV in the input); in fact, in the attached circuit that is what happens:

The problem is that the added offset gives me an output of 500mV when the input is 0mV
If you can give me some advice on how to set the potentiometer in order to get: [2m ... 24m]V input for [0 ... 5]V output would be appreciated.


In the meantime, I would like to ask if I imported the Spice model of the INA118 correctly, because I don't want to do dozens of tests on a model that is perhaps corrupted and/or that I made a mistake to importing ... So I am directly attaching the tutorial I saw:

(let me know if this is the right way to import a spice model)

Load Cell: http://www.diniargeo.it/prd/bilance/celle-di-carico/a-compressione/cpx.aspx

 

hi luca,
This is what the INA118 model I use shows.
E

 

hi luca,
This is what the INA118 model I use shows.
E
View attachment 269506

Thanks! I solved the problem by recalculating the gain because I had made some calculation error and set the potentiometer correctly. I would have liked to eliminate this trend however there is no option to eliminate it, so I will just say that it has been solved