Recent content by Dijoz

  1. Dijoz

    Why do we use 4-20mA instead of 0-20mA current signal in industrial Automation?

    Thanks Mr David . I really missed to mention this point which is applicable for loop powered Transmitters. I take this opportunity to mention why we choose current signal transmission instead of voltage. Current signals are often used in sensors because the current response is usually more...
  2. Dijoz

    Why do we use 4-20mA instead of 0-20mA current signal in industrial Automation?

    Please Refer In process instrumentation, sensors are used to measure physical quantities such as pressure, temperature, flow etc. of the process. The sensor generates output in the form of voltage which is sent to the transmitter attached with the sensor. The transmitter converts voltage...
  3. Dijoz

    250 Ohms Resistor in a Transmitter circuit.

    Please visit below link The talking device transmits a current· The listening device picks up on voltageThe purpose of the ohm shunt resistor is to convert the transmitted current to a voltage the received can pick up. The ohm resistor converts the4- mA analog signals from the HART...
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