Gents,
I would really appreciate your help on this. A system already exists that takes a 4 to 20 ma pressure transmitter output, most likely changes from current to voltage and goes into a microcontroller. What i would like to do is tap into the line ( a T connection) and measure the signal with a DAQ device (I will use DATAQ DI-155). The DI-155 measures only voltage so I plan to use a 250 ohm resistor to achieve a 1-5v output. My question is, if i do this, will i change the output signal from transmitter because im introducing the 250 ohm resistor to the circuit. What is the best approach for me to take this measurement?
I would really appreciate your help on this. A system already exists that takes a 4 to 20 ma pressure transmitter output, most likely changes from current to voltage and goes into a microcontroller. What i would like to do is tap into the line ( a T connection) and measure the signal with a DAQ device (I will use DATAQ DI-155). The DI-155 measures only voltage so I plan to use a 250 ohm resistor to achieve a 1-5v output. My question is, if i do this, will i change the output signal from transmitter because im introducing the 250 ohm resistor to the circuit. What is the best approach for me to take this measurement?