Recent content by ionut1010

Can anyone point me in the right direction ??

First line... Yes one is a pressure sensor and the other is temperature sensor. Two separate loops. I guess my eyes are not the only ones getting crossed

Yes one is a pressure sensor and the other is temperature sensor. Two separate loops. I can not adjust the whole loop with the transducer/ transmitter since it will affect the whole loop. I need my unit to have span and zero adjustment. I am trying to build the circuit myself with an op amp. I...

I do not want any reference to ground. I need to put the least amount of load on the loop due to wire length and other devices on the loop. With the schematic above I can use a 100 ohm or lower resistor for this. I do not want to set the zero and span in software when I can have two trimpots...

Does anyone have a circuit where the 4mA(zero) and 20mA(span) can be adjusted. I would like a way to adjust the two. Or can anyone point me to where I can find such a circuit. I have search the internet for a circuit but can not find one that suits my needs. I am new to 4 to 20ma signals and...

Thanks for the replies. Yes I need the input to be non-grounded. That is why I want to measure the voltage across the resistor(R5). I need to tap into the loop and then feed the mA to the ADC of a microcontroller. Where can a put a trimpot to adjust the 4mA to be 1 v and the 20mA to be 5v. I...

I have found this circuit in my travels on the internet and it should suit my needs. I need to know what this configuration is called so I can calculate the resistors for the gain needed. If anyone knows of a similar circuit that has trimpots to adjust the 4mA to 1v and the 20mA t0 5v that...