Reverse-acting proportional pressure controller

[jim hardy]

I think the PB should be relating to the output which is mA in this question.

PB is the fraction of full scale input required to cause full scale output
Δin/Δout where Δout is 100%

80% of your 15 bar full scale input is 12 bar

 

[jim hardy]

https://www.physicsforums.com/attachments/234224

 

[David J]

I think, finally, after looking at this for hours it just hit home. Its been staring me in the face to be honest but I finally got it. It made me question my answer to the first part though, even though I had been told my answer was correct my graph wasn't so I ended up changing it. We are not even required to create a graph, I just did it to get a better understanding and I think given this problem in the future being able to plot a graph will be a big help

Thanks again for your help with this problem

 

[jim hardy]

I think, finally, after looking at this for hours it just hit home. Its been staring me in the face to be honest but I finally got it.

Isn't that a great feeling ?
Thanks for sharing your victory.
We old guys enjoy them too , if only vicariously.

You're equipped now to help your classmates.

In my plant we made such drawings of our analog reactor control and protection system for our own use.We called them "Scaling Diagrams".
Actually one young engineer made them to teach himself how it all worked and we all recognized their value. ( In case he's reading this , his initials were jpm , nice work Jorge !)
Ten years later our engineering department stumbled across them, cleaned them up and made them into official plant drawings.

As you have found a picture is worth a thousand words .

I'm glad to hear 'the light came on' for you, thanks for the feedback.
Now - Share the light !

old jim