Well, on DC voltage there is some reading, around 100-200 mv when floating but when i short the inputs it goes to zero, unlike the mysterious 40 ohms. Also i was going to ask about C1. In the manual it says it is a dc blocking capacitor but we are actually measuring dc voltage? And as far as i understand the potential representing the unknown resistance is measured at pin “OHS”, right? So if i short this pin to ground i must get a zero reading? And last question - there might be flux left under the chip. What would be the best to try cleaning it?
EDIT: Yesterday i left the meter on my desk with the battery removed. This morning i decided to give it another try. Now it it reading 28 megaohms and 13-14 ohms when shorted. And it hasn’t been touched at all.