Forenote: I'm not an EE, I'm a Controls Engineer.
So if need to measure a resistance value of 240Ω ±2%. I need to figure out what voltage and current range I would need to measure to within 4.8Ω (= 240Ω * 2% I assume I did that right).
So for example (not actual numbers just examples), if my voltage on the line being measure is 9V and voltage input measures 0-10V ±1% of full scale and my current input measures 4 to 20mA ±1% of full scale. How would I calculate my resistance measurement accuracy?
ETA: Side Note I need to ultimately use a PLC to measure this.
ETA2: I added a diagram of the
simulate this circuit – Schematic created using CircuitLab