Engineering Units

[Ron Beaufort]

Does it [work] for all analog quantities like pressure, weight, temperature, strain etc?

it should work for all systems that are "linear" ... in other words, where the input and the output signals would both follow a STRAIGHT LINE if shown on a regular sheet of graph paper ...

but ...

some systems are NOT linear ... I'm retired now - and trying hard to forget everything that I ever knew about this subject - but maybe some of the other forum members can comment on those types of systems - just for completeness ...

 

[Meyers Mills]

Hi Jimtech!
Where FB is? FB input is
FB is the raw value?
Where Actual range is?

 

[drbitboy]

Hi Jimtech!
Where FB is? FB input is
FB is the raw value?
Where Actual range is?

Jsu0234m, ERCfarcontrol, Rson and Jimtech all provided exactly the same formula.


The only difference is in the exact form and names of the various parameters.


Again, I am not trying to demean you or your ability, but if you do not see that all four of those formulae are essentially the same, then I am not confident you should be trying to come up with an answer to whatever issue you are working on, at least not with some serious help from someone who understands your process and what it needs to do.

 

[mad4x4]

Y = MX + B

learn the ins and outs of the above equation and you can scale any hi/low to another hi/low (linear scaling).

You need to be clearer and also define M


M= (y2-y1)/(X2-x1) where :


Y1: EngMin
Y2: EngMax
X1: RawMin
X2: RawMax


B == Y when x0




See https://www.mathsisfun.com/equation_of_line.html

 

[drbitboy]

Here is everything you need to know about scaling.


https://www.plctalk.net/qanda/showpost.php?p=841644&postcount=10



Master that and your life will change for the better.




The entire thread is here:


https://www.plctalk.net/qanda/showthread.php?t=123939