It's for archaeology, so it needs to be accurate enough to detect ditches and walls underground. I've read that a 3 to 5% difference would be acceptable. I'm not expecting readings to be consistent within an ohm, but the different voltage directions are tens to hundreds of ohms out on the same section of soil, which suggests it's not working properly.
I think the problem is when testing a single pair of resistors the result is different calculated values for the load resistor for each voltage direction, and that problem carries over to measuring the soil.
I think the problem is when testing a single pair of resistors the result is different calculated values for the load resistor for each voltage direction, and that problem carries over to measuring the soil.
Statistics: Posted by TTSB — Wed May 01, 2024 9:12 pm
