![]() Pick a value from the 4 to 20 mA linear input range column of the conversion table below, and find the corresponding value in the 3 to 30 psi linear output range column.Įnter input value in mA for a linear range from 4 to 20 mA to calculate output value in psi for a linear range from 3 to 60 psi. Pick a value from the 4 to 20 mA linear input range column of the conversion table below, and find the corresponding value in the 3 to 27 psi linear output range column.Įnter input value in mA for a linear range from 4 to 20 mA to calculate output value in psi for a linear range from 3 to 30 psi. Pick a value from the 4 to 20 mA linear input range column of the conversion table below, and find the corresponding value in the 3 to 15 psi linear output range column.Įnter input value in mA for a linear range from 4 to 20 mA to calculate output value in psi for a linear range from 3 to 27 psi. Sorry, a graphic could not be displayed here, because your browser does not support HTML5 Canvas. 4-20 mA to 3-15 psiĮnter input value in mA for a linear range from 4 to 20 mA to calculate output value in psi for a linear range from 3 to 15 psi. As displacement increases, back pressure to nozzle also increases which is fed to booster relay and as a result we get final pneumatic output (3 to 15) PSI proportional to applied electric signal (4 to 20) mA.Convert process control signal current inputs to pneumatic air pressure signal outputs. more the current produces more displacement of plunger from which a flapper nozzle system is attached. As shown in figure, current output is provided to magnetize coil which move its plunger proportionally i.e. In Electro-pneumatic converter, Analog output from controller is connected as (4-20) mA to its terminal and a pneumatic supply is connected which is to be controlled proportionally. Thus we finally get an output of (3-15) PSI.Īn arrangement showing how final output is generated is shown below. And a decrease in nozzle pressure, positions the valve to allow air to exhaust i.e. An increase in receiver nozzle pressure, it positions the valve in the booster stage to produce an increase in the transducer output signal. The receiver nozzle pressure controls the booster stage, which has a poppet valve design. The receiver nozzle pressure is the output pressure of the pilot stage. ![]() The receiver nozzle captures the air stream and converts it back to pressure. The supply nozzle is connected to the supply air and provides a high‐velocity air stream. It also contains the deflector, which is the moving element. Next the pilot stage contains one or two opposed fixed nozzles- the supply nozzle and the receiver nozzle. The actuator performs the task of converting electrical energy (current) to motion. A change to the level of coil current is made by the electronic circuit when it senses a discrepancy between the pressure measured by the sensor and the pressure required by the input signal. The electronic circuit controls the level of current flowing through the actuator coil, located in the pilot/actuator assembly. A solid‐state pressure sensor is part of the electronic circuit to monitor the booster stage output pressure. ![]() Input current signal received by the transducer’s electronic circuit and compared to the output pressure signal from the booster stage. Electronic Circuit with solid state pressure sensorĪ figure showing typical I/P converters are given below.The Main units with their function is given below.
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