The "I" and "P" in Controls?

Hiram,

I'm assuming you are asking about "I" & "P" as found in PID control. Please see the following link for some information on the subject. PID Info

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An I to P controller or requirements for such a controller are referring to transferring Pneumatic signals to electronic signals. If you have pneumatic actuators on dampers or valves and you want to use electronic thermostats or sensing devises you will need to convert those sensing devises or controls signals to pressure controlled outputs to open and close your valve or move your damper actuators as required. There are several manufacturer of the devises, just tell them the conversions you need to make 4-20 milliamp, 0-5 volts or what ever your electronic signal is, and they can match a controller to control the air pressure to the range you need to move your regulating devise. This is very common in upgraded old system where valves and dampers are reused, but the control system is upgraded to Honeywell, Teletrol, or Johnson Metasis. Call your local building automation contractor and they can hook you up. Good luck...

Very close to a complete description Guest so I will just toss in my two cents real quick.

An I to P (which is often written as I-P or the reverse P-I) converter is normally used to convert a 4-20mA signal to a 3-15psi signal. there are a number of uses for a 3-15psi signal but the most common application is on a pneumatic positioner that requires PID control or at least proportional control.

Thanks for all of your replies.

Regarding Comment #1, I'm aware of PID control and actually I sent the same link to someone yesterday. Thanks for the help and your information is valued.

Regarding Comment #2, This is the answer that I expected. The information that I had was just enough to pose the question. Thanks for the response.

Regards,

Thanks to you all.

An aside, is that some kind of hovercraft or RPV you show as your avatar? Would you post a larger image? (use the camera icon in your message editor to do this).

Thanks!

Hi,

I impressed by the observation that you've made! Good eye!

This is a picture of an AUV "Honeywell" and below is a brochure of this and others like it.

Reason:My motivation in engineering stems from designing robots and ROVs. I've worked with such systems for the past nine years. "Nines years of R&D" and I started a business.

Regards,

http://www.honeywell.com/sites/docs/DE56C67B6-92A0-DC69-7CDB-366064501844.pdf

I'm an instrument engineer : frist I wish to ask you :

are you mean " I to P " or " I & P "

I to P.