Welcome to the Cove!
Now.... be patient with me as I try to understand your scenario.
You have a compression machine, labeled A. You have some load cells that are used on that compression machine, labeled B, C, D.
Your question stems around using the compression machine as a comparative device. Correct?
Does that mean using, B,C,D on A; or on another compression machine?
I guess I'm confused on exactly what you are going to be comparing. Do you have standard load cells you would use as comparison to B, C, D?
Sorry for all the questions.
Just trying to get a feel for your scenario.