# I/P Converter calibration

**URL:** <https://forumautomation.com/t/i-p-converter-calibration/5994>\
**Category:** Calibration\
**Created:** [February 26, 2019, 4:42pm UTC](https://forumautomation.com/t/i-p-converter-calibration/5994 "2019-02-26T16:42:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sivaranjith](https://forumautomation.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@sivaranjith](https://forumautomation.com/u/sivaranjith)\
**Post date:** [February 26, 2019, 4:42pm UTC](https://forumautomation.com/t/i-p-converter-calibration/5994/1 "2019-02-26T16:42:22Z")

</div>

Current to pressure (I/P) converters receive an electrical current signal in a range of [**4 - 20 mA**](https://forumautomation.com/t/4-20ma-transmitter-basic/4524) and provide a corresponding pneumatic signal in a range of 3 - 15 PSI. The [**I/P converters**](https://forumautomation.com/t/current-to-pressure-convertion-using-flapper-nozzle-system/2691) are used in valve positioner, where a controller sends an electrical signal to I/P converter and the converter sends a corresponding pneumatic signal to valve positioners that control the valve.

## Calibration of I/P converter:

**Required Apparatus:**

1. Air Filter Regulator
2. I/P Converter
3. Master Pressure gauge (For Measurement of I/P Output pressure)
4. mA Source (to feed mA to I/P Converter)

## Calibration Procedure:

 ![ip%20con%20cali](https://cdn.forumautomation.com/original/2X/5/5472015790ce615a518d4608f45ad49c11814403.png)

- First remove the module final assembly from the housing.

- Position the range jumper in the Hi position for High Range

- Connect air supply to the input port, which is connected through the air supply regulator.

- Connect the output signal port with an accurate output indicator.

- Make sure the port of the output gauge is installed with an output gauge or a threaded plug. A threaded plug is provided for units shipped without output gauges.

- Apply a 4.0 mA signal (Vm = 1.0 V) and adjust the zero screw to reach the output of 3.0 psi. The output increases with the zero screw rotation in the clockwise direction.

- Repeat the last two steps to verify and complete the calibration.