What do PI and PT mean in PID, and what is the difference between them?
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What do PI and PT mean in PID, and what is the difference between them? Thank you
PI — Pressure display; PT — Pressure transmitter. The difference is clear from the literal meanings: (
HG/T 20505-2014 4.1 Letter codes for instrument function indicators
In PID, there is P proportional control, I integral control, and PI proportional-integral control； PT temperature sensing element....
This post was last edited by ylb913 on 2018-9-25 at 19:19. The device used for measuring pressure is usually the primary gauge that can be seen on-site; it is actually a pressure transmitter that converts the pressure signals measured on-site into electrical signals for transmission to the control room. A PT is a measuring instrument installed on-site, and it includes a transmitter as well. PI is the pressure display on the indoor DCS.
This post shows the deficiencies in English! In English, PID can refer to proportionality. Integral and differential regulation can also refer to flowcharts with control points; replies show that there are responses of both types. If it were in Chinese, such two different answers wouldn’t occur.
In PID, P stands for proportional, I for integral, and D for derivative. In PT, P stands for pressure and T stands for remote transmission; together they refer to a remote pressure transmitter
They are all pressure transmitters, right? They can all be displayed on the monitoring screen
PI pressure display, PT pressure transmitter