Question

I/P Converter converts:

• A. (4-20)mA to (3-15)psi
• B. (0-20)mA to (3-15)psi
• C. (4-20)mV to (3-15)psi
• D. (0-20)mV to (3-15)psi

Hint:

"I" stands for electrical current (measured in mA).
"P" stands for pneumatic pressure (measured in psi).
The standard industrial linear mappings are always $4\text{ mA} \to 3\text{ psi}$ and $20\text{ mA} \to 15\text{ psi}$.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks for the standard conversion ranges associated with an industrial I/P (Current-to-Pressure) converter.

Step 2: Detailed Explanation:

• In industrial instrumentation, process variables are monitored and controlled using standardized analog transmission signals.

• The standard electronic analog signal range used worldwide for controllers and transmitters is $4\text{ to }20\text{ mA}$ direct current.

• For pneumatic control elements (such as pneumatic control valves), the standard operating air pressure range is $3\text{ to }15\text{ psi}$ (pounds per square inch).

• An I/P converter is an electro-pneumatic device that bridges these two domains.

• It takes the $4-20\text{ mA}$ electrical control signal from an electronic controller and converts it linearly into a proportional $3-15\text{ psi}$ pneumatic pressure signal to drive pneumatic actuators.

Step 3: Final Answer:
An I/P converter converts a $(4-20)\text{ mA}$ current signal to a $(3-15)\text{ psi}$ pressure signal.