Meaning of DP transmitter High and Low pressure ports

[mipapijose]

Awesome. Thanks this really helped me. I'm an apprentice and we use these around the plant but I was having trouble understanding them.

[sl33714]

Equal psi to both ports makes 12 mA? 0 DP = 12 mA? I don't get it..... shouldn't 0 DP input make 4 mA? Or are you saying that the output LRV is 12 mA?

[BTCInstrumentation]

@sl33714 "Let's say the transmitter were ranged in such a way so that with no pressure applied . . . the output of the transmitter is 12 mA". An example of this ranging might be -10 PSI to +10 PSI: with -10 PSI (10 PSI applied to the Low side) you get 4 mA, with +10 PSI (10 PSI applied to the High side) you get 20 mA, and with equal pressures (0 PSID) you get 12 mA. LRV = -10 PSI, URV = +10 PSI.

[sl33714]

Equal psi to both ports makes 12 mA? 0 DP = 12 mA? I don't get it..... shouldn't 0 DP input make 4 mA?

[domyaska]

excellent explanation!! thanks a lot for sharing!!!!!!!

[warrat300]

Well, sir, you should teach us industrial machines course...

Thank you for the explanation.