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February 26, 2016 at 10:23 am #8723
Keymaster
Hi Greg and John,
This is correct, there’s a protection device inline that adds a few ohms. The device is a PTC fuse rated to 600V, so if you miswire the meter it won’t be damaged. PTC stands for positive temperature coefficient, which is why you saw the resistance drop when you put it in the freezer.
Hope this helps, best
~James