**I/P Converter (Current to pressure Converter)**

A current to pressure converter (I/P Converter) converts an analog signal (4 to 20 mA) to a proportional linear pneumatic output (3 to 15 psi or 0.2 to 1.0 Kg/cm^2).

Its purpose is to translate the analog output from a control system into a precise, repeatable pressure value to control pneumatic actuators/operators, pneumatic valves. The supply air for Current to Pressure Converter (I to P Converter) is 20 psi.

**I/P converter works on electromotive force balance principle.**

**Calibration of I/P Converter-**

We all know that the supply air for I to P converter is 20 psi. So, first of all, we will set supply air 20 psi. We will connect a pressure gauge in the output of I to P converter.

**The procedure of calibration of Current to Pressure Converter (I to P converter)**

- Apply 4 milliAmperes at the input of I to P converter, its output should be 0.2 kg/cm^2.
- Apply 8 milliAmperes at the input of I to P converter, its output should be 0.4 kg/cm^2
- Apply 12 milliAmperes at the input of I to P converter, its output should be 0.6 kg/cm^2
- Apply 16 milliAmperes at the input of I to P converter, its output should be 0.8 kg/cm^2
- Apply 20 milliAmperes at the input of I to P converter, its output should be 1.0 kg/cm^2

**4-20 milliAmperes signal can be provided to I to P converter using a milliAmpere source or we can also use a PID Controller to provide the 4-20 milliAmperes signal.**

If we are not getting the desired output, we can set it by the **Zero** and **Span** screws.

**4 milliAmperes are set using the Zero screw and 20 milliAmperes are set using the Span screw.**