XTR110 offset and span adjustment circuit

As shown in the figure, this is the offset and span adjustment circuit with 0-10V input voltage and 4-20mA output current. R1 is the offset adjustment potentiometer, and R2 is the span adjustment potentiometer.

Offset adjustment method: Set the input to a small non-zero voltage, adjust R1 so that the output has a correct current value, and then set the input to zero, the output will definitely be zero. Span adjustment method: Set the input voltage to the full scale of 10V, and adjust R2 so that the output current reaches the full scale output current of 20mA. Note that span adjustment will affect offset adjustment, so it is necessary to adjust repeatedly to achieve the best state.